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Date: Thu, 15 Mar 2012 09:42:01 GMT From: s.broersen@uva.nl To: xmmhelp@sciops.esa.int Cc: s.broersen@uva.nl Subject: calview RGS
Full_Name: Sjors Broersen Submission from: (NULL) (145.18.214.170) Hello, I am trying to correct RGS data of an extended source for vignetting. However, the calview program can only show (order -1, 600eV, phi = 0) the effective area as a function of postive theta's. Due to the nature of the instrument I would expect the offaxis effective area to be asymmetric around theta = 0. Is there a way in which I can make the effective area visible for negative theta's? Thanks in advance, Sjors
From: Nora Loiseau <xmmhelp@sciops.esa.int> To: s.broersen@uva.nl Subject: Re: calview RGS (PR#49762) Date: Fri Mar 16 11:39:08 2012
Dear Sjors, The SAS developer in charge of calview informed us that the vignetting that CALVIEW shows for RGS is a combination of the telescope vignetting (fn of theta), the RGS obscuration factor (function of phi) and the RGS self-vignetting factor (function of Beta). CALVIEW can show what he think you want by putting, e.g. order=-1, E=600 eV, Theta=100" and then View->Vignetting vs Phi This gives a plot that I am sending to you in a separate message. Please inform us if you need more details. Best regards, Nora > > I am trying to correct RGS data of an extended source for vignetting. However, > the calview program can only show (order -1, 600eV, phi = 0) the effective area > as a function of postive theta's. Due to the nature of the instrument I would > expect the offaxis effective area to be asymmetric around theta = 0. > > Is there a way in which I can make the effective area visible for negative > theta's? > > Thanks in advance, > > Sjors > > ---- Dr. Nora Loiseau XMM-Newton User Support Group
From: Nora Loiseau <xmmhelp@sciops.esa.int> To: S.Broersen@uva.nl Subject: Re: calview RGS (PR#49762) Date: Fri Mar 16 16:19:52 2012
Dear Sjors, the theta that we were talking about was the off centre angle. I do not find now documentation about the effect of the incident angle, I will ask the experts and come back to you as soon as I have their inputs. Best regards, Nora > > Thanks for your quick answer. What I am looking for however is the change in > effective area as a function of incident angle theta. And this change can be > positive and negative. I don't understand the plot that you suggested gives me > this information. > > Can you explain a bit more? > > Best regards, Sjors > > On Mar 16, 2012, at 12:39 PM, Nora Loiseau wrote: > >> Dear Sjors, >> >> The SAS developer in charge of calview informed us that the vignetting that >> CALVIEW shows for RGS is a combination of the telescope vignetting (fn of >> theta), the RGS obscuration factor (function of phi) and the RGS >> self-vignetting factor (function of Beta). >> >> CALVIEW can show what he think you want by putting, >> >> e.g. order=-1, E=600 eV, Theta=100" >> >> and then View->Vignetting vs Phi >> >> This gives a plot that I am sending to you in a separate message. >> >> Please inform us if you need more details. >> >> Best regards, >> >> Nora >> >>> >>> I am trying to correct RGS data of an extended source for vignetting. >> However, >>> the calview program can only show (order -1, 600eV, phi = 0) the effective >> area >>> as a function of postive theta's. Due to the nature of the instrument I would >>> expect the offaxis effective area to be asymmetric around theta = 0. >>> >>> Is there a way in which I can make the effective area visible for negative >>> theta's? >>> >>> Thanks in advance, >>> >>> Sjors >>> >>> ---- >> Dr. Nora Loiseau >> XMM-Newton User Support Group >> >> This message and any attachments are intended for the use of the addressee or > addressees only. The unauthorised disclosure, use, dissemination or copying > (either in whole or in part) of its content is not permitted. If you received > this message in error, please notify the sender and delete it from your system. > Emails can be altered and their integrity cannot be guaranteed by the sender. >> >> Please consider the environment before printing this email. >> > > > ---- Dr. Nora Loiseau XMM-Newton User Support Group
From: Nora Loiseau <xmmhelp@sciops.esa.int> To: S.Broersen@uva.nl Subject: Re: calview RGS (PR#49762) Date: Tue Mar 20 15:05:54 2012
Dear Sjors, I am consulting the RGS calibration scientist about your questions. He understands that you want to analyse RGS data of an extended source correcting for vignetting and other effects. He said that the problem is not simple, it would help him to give a proper advice if you can provide him the Observation ID of the data that you are analysing and the final aim of your analysis. Best regards, Nora > > I think part of the information I need is in the file RGS?_QUANTUMEF_000*.CCF. > It gives the reflection efficiency as a function of incident angle alpha for > different lambda. However, I still don't see information regarding negative > alphas in that file. > > I have an additional question: > > When plotting the effective area as a function of theta, there is no more > effective area beyond theta = 1200''. Is that because there really is no more > effective area (due to self-vignetting / obscuration)? > > Best regards, > > Sjors > > On Mar 16, 2012, at 5:19 PM, Nora Loiseau wrote: > >> Dear Sjors, >> >> the theta that we were talking about was the off centre angle. >> I do not find now documentation about the effect of the incident >> angle, I will ask the experts and come back to you as soon >> as I have their inputs. >> >> Best regards, >> >> Nora >> >>> >>> Thanks for your quick answer. What I am looking for however is the change in >>> effective area as a function of incident angle theta. And this change can be >>> positive and negative. I don't understand the plot that you suggested gives >> me >>> this information. >>> >>> Can you explain a bit more? >>> >>> Best regards, Sjors >>> >>> On Mar 16, 2012, at 12:39 PM, Nora Loiseau wrote: >>> >>>> Dear Sjors, >>>> >>>> The SAS developer in charge of calview informed us that the vignetting that >>>> CALVIEW shows for RGS is a combination of the telescope vignetting (fn of >>>> theta), the RGS obscuration factor (function of phi) and the RGS >>>> self-vignetting factor (function of Beta). >>>> >>>> CALVIEW can show what he think you want by putting, >>>> >>>> e.g. order=-1, E=600 eV, Theta=100" >>>> >>>> and then View->Vignetting vs Phi >>>> >>>> This gives a plot that I am sending to you in a separate message. >>>> >>>> Please inform us if you need more details. >>>> >>>> Best regards, >>>> >>>> Nora >>>> >>>>> >>>>> I am trying to correct RGS data of an extended source for vignetting. >>>> However, >>>>> the calview program can only show (order -1, 600eV, phi = 0) the effective >>>> area >>>>> as a function of postive theta's. Due to the nature of the instrument I >> would >>>>> expect the offaxis effective area to be asymmetric around theta = 0. >>>>> >>>>> Is there a way in which I can make the effective area visible for negative >>>>> theta's? >>>>> >>>>> Thanks in advance, >>>>> >>>>> Sjors >>>>> >>>>> ---- >>>> Dr. Nora Loiseau >>>> XMM-Newton User Support Group >>>> >>>> This message and any attachments are intended for the use of the addressee >> or >>> addressees only. The unauthorised disclosure, use, dissemination or copying >>> (either in whole or in part) of its content is not permitted. If you received >>> this message in error, please notify the sender and delete it from your >> system. >>> Emails can be altered and their integrity cannot be guaranteed by the sender. >>>> >>>> Please consider the environment before printing this email. >>>> >>> >>> >>> ---- >> Dr. Nora Loiseau >> XMM-Newton User Support Group >> >> This message and any attachments are intended for the use of the addressee or > addressees only. The unauthorised disclosure, use, dissemination or copying > (either in whole or in part) of its content is not permitted. If you received > this message in error, please notify the sender and delete it from your system. > Emails can be altered and their integrity cannot be guaranteed by the sender. >> >> Please consider the environment before pr
From: Nora Loiseau <xmmhelp@sciops.esa.int> To: S.Broersen@uva.nl Subject: Re: calview RGS (PR#49762) Date: Tue Mar 20 15:49:36 2012
Dear Sjors, > I know that it is not an easy problem, but we have a solution now that works. It > is not perfect, however. I only wanted to check if there is nothing better > available in the RGS calibration files than what I have found so far. > > Perhaps you can put me in contact with the RGS expert directly? > The RGS expert is very interested in knowing your solution, and in discussing possible issues with you. He prefers to do it through this helpdesk system where we keep track of these issues, which could be helpful for future SAS developments. In this case in particular these messages are private, therefore hidden for the rest of the users. Best regards, Nora > On Mar 20, 2012, at 4:05 PM, Nora Loiseau wrote: > >> Dear Sjors, >> >> I am consulting the RGS calibration scientist about your questions. He >> understands that you want to analyse RGS data of an extended source >> correcting for vignetting and other effects. He said that the >> problem is not simple, it would help him to give a proper advice >> if you can provide him the Observation ID of the data that you are >> analysing and the final aim of your analysis. >> >> Best regards, >> >> Nora >> >>> >>> I think part of the information I need is in the file >> RGS?_QUANTUMEF_000*.CCF. >>> It gives the reflection efficiency as a function of incident angle alpha for >>> different lambda. However, I still don't see information regarding negative >>> alphas in that file. >>> >>> I have an additional question: >>> >>> When plotting the effective area as a function of theta, there is no more >>> effective area beyond theta = 1200''. Is that because there really is no more >>> effective area (due to self-vignetting / obscuration)? >>> >>> Best regards, >>> >>> Sjors >>> >>> On Mar 16, 2012, at 5:19 PM, Nora Loiseau wrote: >>> >>>> Dear Sjors, >>>> >>>> the theta that we were talking about was the off centre angle. >>>> I do not find now documentation about the effect of the incident >>>> angle, I will ask the experts and come back to you as soon >>>> as I have their inputs. >>>> >>>> Best regards, >>>> >>>> Nora >>>> >>>>> >>>>> Thanks for your quick answer. What I am looking for however is the change >> in >>>>> effective area as a function of incident angle theta. And this change can >> be >>>>> positive and negative. I don't understand the plot that you suggested gives >>>> me >>>>> this information. >>>>> >>>>> Can you explain a bit more? >>>>> >>>>> Best regards, Sjors >>>>> >>>>> On Mar 16, 2012, at 12:39 PM, Nora Loiseau wrote: >>>>> >>>>>> Dear Sjors, >>>>>> >>>>>> The SAS developer in charge of calview informed us that the vignetting >> that >>>>>> CALVIEW shows for RGS is a combination of the telescope vignetting (fn of >>>>>> theta), the RGS obscuration factor (function of phi) and the RGS >>>>>> self-vignetting factor (function of Beta). >>>>>> >>>>>> CALVIEW can show what he think you want by putting, >>>>>> >>>>>> e.g. order=-1, E=600 eV, Theta=100" >>>>>> >>>>>> and then View->Vignetting vs Phi >>>>>> >>>>>> This gives a plot that I am sending to you in a separate message. >>>>>> >>>>>> Please inform us if you need more details. >>>>>> >>>>>> Best regards, >>>>>> >>>>>> Nora >>>>>> >>>>>>> >>>>>>> I am trying to correct RGS data of an extended source for vignetting. >>>>>> However, >>>>>>> the calview program can only show (order -1, 600eV, phi = 0) the >> effective >>>>>> area >>>>>>> as a function of postive theta's. Due to the nature of the instrument I >>>> would >>>>>>> expect the offaxis effective area to be asymmetric around theta = 0. >>>>>>> >>>>>>> Is there a way in which I can make the effective ar
From: Nora Loiseau <xmmhelp@sciops.esa.int> To: S.Broersen@uva.nl Subject: Re: calview RGS (PR#49762) Date: Fri Mar 23 15:58:31 2012
Dear Sjors, > The solution is the same as was used in Vink et al. 2003 (Slow temperature > equilibration behind the shock front of SN 1006) and is to convolve the response > matrix with the emission profile of the source. We agree with this. > This is also similar to XSPEC > module rgsrmfsmooth, which doesn't take vignetting into account. > I have a description of the offaxis response, obtained by plotting it in > calview and making an ascii dump of it. However, the offaxis response for > negative theta should be different from positive theta, due to the layout > of the instrument. In calview theta is defined as the off-axis distance (in arcsec) of a certain point to the center of the field of view, and phi is the angle measured counter-clockwise from the dispersion axis. To know the effect of vignetting along the cross-dispersion axis, you can put phi=90 (i.e. to be in the positive cross-dispersion axis), and then you can get the plot of vignetting (or effective area) versus distance for theta from 0 to about 1200" (the instrument size is 300" this is why it is cut). To get the plot for the other (negative) half cross dispersion axis you can put phi=270, and you will notice that vignetting is symmetric. For more details please see: http://xmm2.esac.esa.int/external/xmm_sw_cal/calib/documentation/CALHB/node7.html Best regards, Nora ---- Dr. Nora Loiseau XMM-Newton User Support Group
From: Nora Loiseau <xmmhelp@sciops.esa.int> To: S.Broersen@uva.nl Subject: Re: calview RGS (PR#49762) Date: Tue Mar 27 10:29:23 2012
Dear Sjors The task 'calview' is intended to visualise some of the most relevant instrumental details, not to access the calibration data themselves. Then, though extremely useful, this task lacks some flexibility to select all possible parameters and/or options. Therefore in some cases, it might be necessary to access the CCF directly to examine the calibration data in detail. For the normal processing of the data, this is not needed, as SAS takes into account all necessary corrections. The grating efficiency as a function of incidence angle, as you mentioned in a previous mail, is stored in extension #11 of the CCF RGSX_QUANTUMEF_00XX.CCF (extension RGA_EFF) (see a brief description of the contents and structure of the different CCFs in the Calibration Handbook: http://xmm2.esac.esa.int/external/xmm_sw_cal/calib/documentation/CALHB/node653.html ) There, the grating efficiency is given for 60 wavelengths (from 5 to 60 A), and 27 incidence angles,from 0.28 to 2.98 degrees. This incidence angle is defined as alpha = alpha0 + disp being alpha0 the nominal on-axis incidence angle (1.576191 deg), and 'disp' the angular distance in the dispersion direction (i.e. disp can be positive or negative). The header of this extension contains also information about the RGA self-vignetting, through the keyword BETA_VIG, see http://xmm2.esac.esa.int/external/xmm_sw_cal/calib/documentation/CALHB/node433.html. Best regards, Nora ---- Dr. Nora Loiseau XMM-Newton User Support Group
From: Nora Loiseau <xmmhelp@sciops.esa.int> To: S.Broersen@uva.nl Subject: Re: calview RGS (PR#49762) Date: Tue Mar 27 11:50:04 2012
Dear Sjors, yes, thanks, I am making it public. Cheers, Nora > Thanks Nora, this is exactly what I needed to know! > > If you think this email conversation might be useful for other RGS users, feel > free to make it public. > > Cheers, > Sjors > > On Mar 27, 2012, at 12:29 PM, Nora Loiseau wrote: > >> Dear Sjors >> >> The task 'calview' is intended to visualise some of the most relevant >> instrumental details, not to access the calibration data themselves. Then, >> though extremely useful, this task lacks some flexibility to select all > possible >> parameters and/or options. >> >> Therefore in some cases, it might be necessary to access the CCF directly to >> examine the calibration data in detail. >> >> For the normal processing of the data, this is not needed, as SAS takes into >> account all necessary corrections. >> >> The grating efficiency as a function of incidence angle, as you mentioned in a >> previous mail, is stored in extension #11 of the CCF RGSX_QUANTUMEF_00XX.CCF >> (extension RGA_EFF) (see a brief description of the contents and structure of >> the different CCFs in the Calibration Handbook: >> http://xmm2.esac.esa.int/external/xmm_sw_cal/calib/documentation/CALHB/node653.html >> ) >> >> There, the grating efficiency is given for 60 wavelengths (from 5 to 60 A), > and >> 27 incidence angles,from 0.28 to 2.98 degrees. >> >> This incidence angle is defined as >> >> alpha = alpha0 + disp >> >> being alpha0 the nominal on-axis incidence angle (1.576191 deg), and 'disp' > the >> angular distance in the dispersion direction (i.e. disp can be positive or >> negative). >> >> The header of this extension contains also information about the RGA >> self-vignetting, through the keyword BETA_VIG, see >> http://xmm2.esac.esa.int/external/xmm_sw_cal/calib/documentation/CALHB/node433.html. >> >> Best regards, >> >> Nora >> ---- >> Dr. Nora Loiseau >> XMM-Newton User Support Group >> >> This message and any attachments are intended for the use of the addressee or > addressees only. The unauthorised disclosure, use, dissemination or copying > (either in whole or in part) of its content is not permitted. If you received > this message in error, please notify the sender and delete it from your system. > Emails can be altered and their integrity cannot be guaranteed by the sender. >> >> Please consider the environment before printing this email. >> > > > ---- Dr. Nora Loiseau XMM-Newton User Support Group
Date: Fri, 16 Mar 2012 12:41:44 +0100 From: Nora Loiseau <nora.loiseau@sciops.esa.int> To: s.broersen@uva.nl Cc: helpdesk <xmmhelp@sciops.esa.int> Subject: Re: calview RGS (PR#49762)
This is a multi-part message in MIME format. --------------080006030909030400040807 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Dear Sjors, please find attached a plot produced by CALVIEW when putting, e.g. order=-1, E=600 eV, Theta=100" and then View->Vignetting vs Phi Best regards, Nora --------------080006030909030400040807 Content-Type: image/gif; name="RGS1_Vig_v_phi.gif" Content-Transfer-Encoding: base64 Content-Disposition: inline; filename="RGS1_Vig_v_phi.gif" R0lGODdh1AOlA/cAAAQCBASqHISCfKzC3GxmZKSinAR6FOTi3KyinCQiHKyWhLSyrISG5Kx2 vMzCvERCPJSSjFxaVGxq7NTSzDQyLLyyrBQSDPT29JSOhHR2dMSqrLy6tKyuzExOTNzazIyK hFyGZOzq5KyqpCwqJGRmZDw6NBwaFMS6tMzKxJyalIyCdHRylGRiXIR+dAwKBGxubIS6jOzm 3Ky+rJye1MR2nExKRIRe1NzSxPz+/Ly6xFxWVOTa1ESyVLSqpMTCvKSi1CwmJMyOnJyWjGRe XDw2NBwWFPz29Hx+lFRWVDQuLEQ+PCQeHNTKvGS2bDSyRISGfKSmpNzm9KymnCQmJKyaxLSy xJSC1MzGvExGRFxeXDQ2NMSytBQWFJyOfHx2dLy+vFROTNze3IyOhOzu5CwuLDw+PBweHMS+ tKSelIyGhAwODHRubMxylJR2zNzWzLSupMTGxPz69NTOxAQGBAyuJISChGxqZKSipCx+POTm 5CQiJLSytIyK3KR+xERCRJSWlFxaXJRqxHS2hHR27FSyZGRqfLSqxKSazLSWvLS+tNTW1MSu tIyGfLy2rLy+xOTe1Hx6dFRSTHRybDQyNBQSFJSOjLy6vNza1IyKjOzq7KyqrCwqLDw6PBwa HJyanGRiZIR+fAwKDOzm5MR2pExKTNzSzMTCxJyWlNTKxKympMzGxMS+vLSurPz6/KAS7QcA v+AoMKIA2BOg7QgHvwA8AQAAAADYoADYKADtFAC/CB9cFggC8AYABQgACABoCAAYEACVlQAJ CVhzeAJiAKCOoAcAB9AkmNn7F+0glb8ACWs+7AGrAAAUAAADKKVoMAMY2ACV7QAJv9RcCgMC AOj0VtmTAe2IAL8AACUIMAAQ2AEkAwD7AAAgAK34+CfY1w3t7Qi/vxZP/wCo/6AU/wcA//jQ cdkV0u2ViL8JAAFoOwAYuQCVjgAJAABcGAAC2AAA7QAAvwDg7ACilQATEgAIAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACwAAAAA1AOlAwAI/gDnABA4h1OJEgYRHkzIcKFD hRAbRnwosSLFixMzWtSIcaPHjiA5ivw4MiTJkyZTllyJkqXKljBfynRJM2bNmTZz4tx5s6dO nzx/Cg1KFKjRoUeLIl2qtGnSpwQR4phKtarVq1izat3KtavXr2DDih1LtqzZs2jTql3Ltq3b t3Djyp1Lt67du3jz6t3LN63UqQM5TR1DuLDhw4gTK17MuLHjx5AjS55MubLly5gza97MubPn z6BDix5NurTp06hTq17NurXmqUpCjCmII4TtEJls58atuzfv37uD+xYOfLjx4siJKz++PDnz 586jN58Onbr06tiva7fOPXv37d7D/oMf/728ePPkz6tPzx69+/Xv28OfL79+/Pv08dvPz3+/ dhUABiiggMQNaGCABR5o4G0hyBEbAILZJgoBp1Ro4YUXEiDKhjFw6KEoHYL4YYgkjmiiiCiW mOKJKrbI4osrxuiijDDOaGONONKo44075sjjjz4G2eOQQBIpZJFIHqmkkUwm2eSSTkYJ5ZRP VimllVReqWWWXGLp5ZZfKqnCV2NuKMqYXpW5IZpdjRmCKHKUIIpgIMYQgyZV5XDKH3ueEgZV mtjZoZ11FkrooYMmaqiiiC7qaKOQMirpo5NGSumllmZa6aaYcqppp6B+KqqnpIZa6qimporq qqe2qqqr/qy+KmustMJq66y31orrrrr2muuvvALra7DE1hoDI7UxqCyDx+IQg5vLRtvss8lG qyy1dsZZgrOC4mlEGAeEkcG4GXgCbiY4BCrouuy26+678MYr77z01mvvvfjmq+++/Pbr778A ByzwwAQXbPDBCCes8MIMN+zwwxAvrKaZFJs56JjUVqyxiNhOvDHF2MYQpxI4HGDyAXhqgkkd mLTs8hErp3vAIzHQbHPNON+sc8487+xzz0D/LHTQRA9tdNFIH6100kwv7XTTUD8tddRUT211 1VhfrXXWXG/tdddgfy122GSPbXbZaJ+tdtpsf41xvSq0EjK9cc8975gz32AQ/g6P9B1DKopg wsEhdWQBhSOIS4DIHzL3PbPjfT/yuOSRT2555ZhDrjnlm1/eeeach+656KCPbnrpqH+uOumr n9566qzH7rrssM9ue+24v6477ZrvUIcWagCgBhkE5M778berDgAAmKy+fPPJH08KF89zvvz1 y6tOShHVUz599ZOrogP1lHDStw56hAJAJ5+UwvkOWnQf/ehaTIIG8sbPn//+u+vfP//4+58A A0hA/xUQgAZMIAAxdoAYNPCBDhTFAx8xJgo6q4HYw94EK8jAGCwPgh90oAVphgqp2OwRmkhh DxSQgQ44ggMnoAIb+MA4TZzwEaKIXA77tkMc6vCH/jwEog+DSMQhGrGHSBRiEou4xCMq8YlM hKITo0jFKVqxiViUYharuMUravGLXASjF8NIxinO7HFumMRA/DAEMJgBAE7cwRjn2MUtnjFy y/tAzSj3uJkNgQULEOMS70i5TvhheZWA3B//qAcALGFyPTwAFw4JAD1GzgSUTCTlUEE9ImTB jX0DwBQiQEks+O0RJLieJcu4Q0LODJGCjCUrZUlHWtbRlricpS5ructb9jKXvAymL4NZM2Qd IIcOfOAEcaaCOGDLZBm83s2a+cwDXA+ay8tZBR+hLb5FLoVPSIQMNHEHRwwiCIFYRQ4gkK7I ufOd8IynPOdJz3ra8574/synPvfJz376858ADahAB8rPCQnvBO6sQCgBQAAyMO8RFZgEJQAQ ikmIIHKnmIT69LCHvmECCMKLBCoW+gF5ZnSjHY3oRENBhFS8spI6AAAp+raK5fngEXmkWRr0 MAdKgAEFj0gDADbxiFIsTxWP4AQAJPFOy+V0j5FzQ/Ce4Dc5urNmOXWnNSt5QkAAwA6aO8BF JWeHgUTOEwCARFbhWYkkhGIOm6hEDOQIS5wCoBLRJKhe98rXvvr1r4ANrGADizE+nlJyNZtZ My04Mw8a1pp3XCzebJbXyLaib3ojWeWgkEJH5OAHjrACGxhQhS84ooZaDSvn+rhayLHWsK19 /q0rXata2bYWtqy1rW5ry9vY9ja3v6Wtb4cLXOIKt7jIPa5ycbvc2TL3uc6N7m2lu1vjTo56 YI3n9cqgg/uhQQs6yIIaQzFSTCyvBIAgQgoeAQoAcAEQapwCXR/6WvMCAL3qfcR3wzvekeZx AQNxX1mVsNDmtZcLOlDjJnZQUwCUIgWI3IFAFEpId+bUqpE78CXg+bj5Ni90F+4b9ZSghoIo 9J0EEGXfHKAGP9j1w6ETqkw7sLw0LNTGdv1AFpbHCRYMIXPUDS50p0vk6iZ3yEZubpGFHGTj IpnJS3Zyk488ZSUn+clSjjKVtby5RyArn5L1Jk7hCcfIhfmd2INn/tz61k13phATX6jCIDTQ gApUIQeOWAVqI4fhvvXZqn/2szsBPWhB89nQhg70IxTN6EIv2tGNPvSjJR3pREP60pTGtKUz zelNe3rSlQa1pkXdaVJ/mtClRvWpEW3qVvf5EQLBcSekadcavDMVkvDx8k7xiCUAoAOR2/Ab HzAErwIACo/YwAZu8Ope/1rSuNY1AHid000AQACPmPUfSPqIN/qBBcZG9qxTQAA1IFgEwmO1 hbn6zjC80Qv2XCse2b3QUOjA2mqQgzshMJBUPMINZFjCBHIczzdGoG9eNQO3CS5vV7Na1Q6f 9KolHvFQQ/ziD884xTG+cY1b3OOj5vjH/jtO8pGbPOQgT3XKJ67od24TyPBkRBxGGEoyu1Pm NJ939lzuzRsQQTBuTuEX+EADG3DAEV8QBCFO206Jy7Hljn5nsykuaanHc+pYv7rW4Zl1rm/d 6l4PO9jHHvWyV93s6k471dXedbKf/e1s/zra1073tk8au32ThFLheInl1cGdO85gSWuM5mhi ANFPv/E7A4+9wXP1CQCYRCrcu+Ed5DSaXEUCAEiwiQe4cQ0yhbrl6R05vIZCDolv9ug/kPhF yzt4GXjEFXbt509QNAVyZIUoH/CA5W0CrK1fHrYfIYDsrX4HfefqWu0O97rLvfnMj7vY5x59 508f+s+Xvtu1/k/97Ft/+9/v/vW5j32xt97LOGj901Pft8V++RF9h/8jwgB/OFrV/WJOPvY2 bOaZ70AOeyNob7YIbbAIM/AFTtAEPBAAX7Bn6qZ+j4Zh7Cdo5zeBEeh0F0iBGFiBGXiBEtiB FhiCIDiCHFiCG3iCH2iCKYiCh6aCLciCGriCMviCMxiDNHiDNpiDHoiDGbgDQwAAlHBTO/AB OxdiEgYALOAGs8dVbxQJT7dhs1ZSG+YDcqRsE/BqO9CET3iESbiEjsd6peACABA/2ZVjWchV U9g3/JYAaQ
From: "Broersen, Sjors" <S.Broersen@uva.nl> To: Nora Loiseau <xmmhelp@sciops.esa.int> Subject: Re: calview RGS (PR#49762) Date: Fri, 16 Mar 2012 15:14:07 +0000
Dear Nora, Thanks for your quick answer. What I am looking for however is the change in effective area as a function of incident angle theta. And this change can be positive and negative. I don't understand the plot that you suggested gives me this information. Can you explain a bit more? Best regards, Sjors On Mar 16, 2012, at 12:39 PM, Nora Loiseau wrote: > Dear Sjors, > > The SAS developer in charge of calview informed us that the vignetting that > CALVIEW shows for RGS is a combination of the telescope vignetting (fn of > theta), the RGS obscuration factor (function of phi) and the RGS > self-vignetting factor (function of Beta). > > CALVIEW can show what he think you want by putting, > > e.g. order=-1, E=600 eV, Theta=100" > > and then View->Vignetting vs Phi > > This gives a plot that I am sending to you in a separate message. > > Please inform us if you need more details. > > Best regards, > > Nora > >> >> I am trying to correct RGS data of an extended source for vignetting. > However, >> the calview program can only show (order -1, 600eV, phi = 0) the effective > area >> as a function of postive theta's. Due to the nature of the instrument I would >> expect the offaxis effective area to be asymmetric around theta = 0. >> >> Is there a way in which I can make the effective area visible for negative >> theta's? >> >> Thanks in advance, >> >> Sjors >> >> ---- > Dr. Nora Loiseau > XMM-Newton User Support Group > > This message and any attachments are intended for the use of the addressee or addressees only. The unauthorised disclosure, use, dissemination or copying (either in whole or in part) of its content is not permitted. If you received this message in error, please notify the sender and delete it from your system. Emails can be altered and their integrity cannot be guaranteed by the sender. > > Please consider the environment before printing this email. >
From: "Broersen, Sjors" <S.Broersen@uva.nl> To: Nora Loiseau <xmmhelp@sciops.esa.int> Subject: Re: calview RGS (PR#49762) Date: Mon, 19 Mar 2012 10:54:58 +0000
Dear Nora, I think part of the information I need is in the file RGS?_QUANTUMEF_000*.CCF. It gives the reflection efficiency as a function of incident angle alpha for different lambda. However, I still don't see information regarding negative alphas in that file. I have an additional question: When plotting the effective area as a function of theta, there is no more effective area beyond theta = 1200''. Is that because there really is no more effective area (due to self-vignetting / obscuration)? Best regards, Sjors On Mar 16, 2012, at 5:19 PM, Nora Loiseau wrote: > Dear Sjors, > > the theta that we were talking about was the off centre angle. > I do not find now documentation about the effect of the incident > angle, I will ask the experts and come back to you as soon > as I have their inputs. > > Best regards, > > Nora > >> >> Thanks for your quick answer. What I am looking for however is the change in >> effective area as a function of incident angle theta. And this change can be >> positive and negative. I don't understand the plot that you suggested gives > me >> this information. >> >> Can you explain a bit more? >> >> Best regards, Sjors >> >> On Mar 16, 2012, at 12:39 PM, Nora Loiseau wrote: >> >>> Dear Sjors, >>> >>> The SAS developer in charge of calview informed us that the vignetting that >>> CALVIEW shows for RGS is a combination of the telescope vignetting (fn of >>> theta), the RGS obscuration factor (function of phi) and the RGS >>> self-vignetting factor (function of Beta). >>> >>> CALVIEW can show what he think you want by putting, >>> >>> e.g. order=-1, E=600 eV, Theta=100" >>> >>> and then View->Vignetting vs Phi >>> >>> This gives a plot that I am sending to you in a separate message. >>> >>> Please inform us if you need more details. >>> >>> Best regards, >>> >>> Nora >>> >>>> >>>> I am trying to correct RGS data of an extended source for vignetting. >>> However, >>>> the calview program can only show (order -1, 600eV, phi = 0) the effective >>> area >>>> as a function of postive theta's. Due to the nature of the instrument I > would >>>> expect the offaxis effective area to be asymmetric around theta = 0. >>>> >>>> Is there a way in which I can make the effective area visible for negative >>>> theta's? >>>> >>>> Thanks in advance, >>>> >>>> Sjors >>>> >>>> ---- >>> Dr. Nora Loiseau >>> XMM-Newton User Support Group >>> >>> This message and any attachments are intended for the use of the addressee > or >> addressees only. The unauthorised disclosure, use, dissemination or copying >> (either in whole or in part) of its content is not permitted. If you received >> this message in error, please notify the sender and delete it from your > system. >> Emails can be altered and their integrity cannot be guaranteed by the sender. >>> >>> Please consider the environment before printing this email. >>> >> >> >> ---- > Dr. Nora Loiseau > XMM-Newton User Support Group > > This message and any attachments are intended for the use of the addressee or addressees only. The unauthorised disclosure, use, dissemination or copying (either in whole or in part) of its content is not permitted. If you received this message in error, please notify the sender and delete it from your system. Emails can be altered and their integrity cannot be guaranteed by the sender. > > Please consider the environment before printing this email. >
From: "Broersen, Sjors" <S.Broersen@uva.nl> To: Nora Loiseau <xmmhelp@sciops.esa.int> Subject: Re: calview RGS (PR#49762) Date: Tue, 20 Mar 2012 15:29:18 +0000
Dear Nora, I know that it is not an easy problem, but we have a solution now that works. It is not perfect, however. I only wanted to check if there is nothing better available in the RGS calibration files than what I have found so far. Perhaps you can put me in contact with the RGS expert directly? Best regards, Sjors On Mar 20, 2012, at 4:05 PM, Nora Loiseau wrote: > Dear Sjors, > > I am consulting the RGS calibration scientist about your questions. He > understands that you want to analyse RGS data of an extended source > correcting for vignetting and other effects. He said that the > problem is not simple, it would help him to give a proper advice > if you can provide him the Observation ID of the data that you are > analysing and the final aim of your analysis. > > Best regards, > > Nora > >> >> I think part of the information I need is in the file > RGS?_QUANTUMEF_000*.CCF. >> It gives the reflection efficiency as a function of incident angle alpha for >> different lambda. However, I still don't see information regarding negative >> alphas in that file. >> >> I have an additional question: >> >> When plotting the effective area as a function of theta, there is no more >> effective area beyond theta = 1200''. Is that because there really is no more >> effective area (due to self-vignetting / obscuration)? >> >> Best regards, >> >> Sjors >> >> On Mar 16, 2012, at 5:19 PM, Nora Loiseau wrote: >> >>> Dear Sjors, >>> >>> the theta that we were talking about was the off centre angle. >>> I do not find now documentation about the effect of the incident >>> angle, I will ask the experts and come back to you as soon >>> as I have their inputs. >>> >>> Best regards, >>> >>> Nora >>> >>>> >>>> Thanks for your quick answer. What I am looking for however is the change > in >>>> effective area as a function of incident angle theta. And this change can > be >>>> positive and negative. I don't understand the plot that you suggested gives >>> me >>>> this information. >>>> >>>> Can you explain a bit more? >>>> >>>> Best regards, Sjors >>>> >>>> On Mar 16, 2012, at 12:39 PM, Nora Loiseau wrote: >>>> >>>>> Dear Sjors, >>>>> >>>>> The SAS developer in charge of calview informed us that the vignetting > that >>>>> CALVIEW shows for RGS is a combination of the telescope vignetting (fn of >>>>> theta), the RGS obscuration factor (function of phi) and the RGS >>>>> self-vignetting factor (function of Beta). >>>>> >>>>> CALVIEW can show what he think you want by putting, >>>>> >>>>> e.g. order=-1, E=600 eV, Theta=100" >>>>> >>>>> and then View->Vignetting vs Phi >>>>> >>>>> This gives a plot that I am sending to you in a separate message. >>>>> >>>>> Please inform us if you need more details. >>>>> >>>>> Best regards, >>>>> >>>>> Nora >>>>> >>>>>> >>>>>> I am trying to correct RGS data of an extended source for vignetting. >>>>> However, >>>>>> the calview program can only show (order -1, 600eV, phi = 0) the > effective >>>>> area >>>>>> as a function of postive theta's. Due to the nature of the instrument I >>> would >>>>>> expect the offaxis effective area to be asymmetric around theta = 0. >>>>>> >>>>>> Is there a way in which I can make the effective area visible for > negative >>>>>> theta's? >>>>>> >>>>>> Thanks in advance, >>>>>> >>>>>> Sjors >>>>>> >>>>>> ---- >>>>> Dr. Nora Loiseau >>>>> XMM-Newton User Support Group >>>>> >>>>> This message and any attachments are intended for the use of the addressee >>> or >>>> addressees only. The unauthorised disclosure, use, dissemination or copying >>>> (either in whole or in part) of its content is not permitted. If you > received >>>> this message in error, please notify the sender and delete it from your >>> system. >>>> Emails can be altered and their integrity cannot be guaranteed by the
From: "Broersen, Sjors" <S.Broersen@uva.nl> To: Nora Loiseau <xmmhelp@sciops.esa.int> Subject: Re: calview RGS (PR#49762) Date: Tue, 20 Mar 2012 16:45:32 +0000
Dear Nora, The solution is the same as was used in Vink et al. 2003 (Slow temperature equilibration behind the shock front of SN 1006) and is to convolve the response matrix with the emission profile of the source. This is also similar to XSPEC module rgsrmfsmooth, which doesn't take vignetting into account. I have a description of the offaxis response, obtained by plotting it in calview and making an ascii dump of it. However, the offaxis response for negative theta should be different from positive theta, due to the layout of the instrument. My question is only if I can obtain this data somewhere, or that I have to make a guess. Kind regards, Sjors On Mar 20, 2012, at 4:49 PM, Nora Loiseau wrote: > Dear Sjors, > > >> I know that it is not an easy problem, but we have a solution now that works. > It >> is not perfect, however. I only wanted to check if there is nothing better >> available in the RGS calibration files than what I have found so far. >> >> Perhaps you can put me in contact with the RGS expert directly? >> > The RGS expert is very interested in knowing your solution, and > in discussing possible issues with you. He prefers to do it through > this helpdesk system where we keep track of these issues, which could > be helpful for future SAS developments. > In this case in particular these messages are private, therefore > hidden for the rest of the users. > > Best regards, > > Nora > >> On Mar 20, 2012, at 4:05 PM, Nora Loiseau wrote: >> >>> Dear Sjors, >>> >>> I am consulting the RGS calibration scientist about your questions. He >>> understands that you want to analyse RGS data of an extended source >>> correcting for vignetting and other effects. He said that the >>> problem is not simple, it would help him to give a proper advice >>> if you can provide him the Observation ID of the data that you are >>> analysing and the final aim of your analysis. >>> >>> Best regards, >>> >>> Nora >>> >>>> >>>> I think part of the information I need is in the file >>> RGS?_QUANTUMEF_000*.CCF. >>>> It gives the reflection efficiency as a function of incident angle alpha > for >>>> different lambda. However, I still don't see information regarding negative >>>> alphas in that file. >>>> >>>> I have an additional question: >>>> >>>> When plotting the effective area as a function of theta, there is no more >>>> effective area beyond theta = 1200''. Is that because there really is no > more >>>> effective area (due to self-vignetting / obscuration)? >>>> >>>> Best regards, >>>> >>>> Sjors >>>> >>>> On Mar 16, 2012, at 5:19 PM, Nora Loiseau wrote: >>>> >>>>> Dear Sjors, >>>>> >>>>> the theta that we were talking about was the off centre angle. >>>>> I do not find now documentation about the effect of the incident >>>>> angle, I will ask the experts and come back to you as soon >>>>> as I have their inputs. >>>>> >>>>> Best regards, >>>>> >>>>> Nora >>>>> >>>>>> >>>>>> Thanks for your quick answer. What I am looking for however is the change >>> in >>>>>> effective area as a function of incident angle theta. And this change can >>> be >>>>>> positive and negative. I don't understand the plot that you suggested > gives >>>>> me >>>>>> this information. >>>>>> >>>>>> Can you explain a bit more? >>>>>> >>>>>> Best regards, Sjors >>>>>> >>>>>> On Mar 16, 2012, at 12:39 PM, Nora Loiseau wrote: >>>>>> >>>>>>> Dear Sjors, >>>>>>> >>>>>>> The SAS developer in charge of calview informed us that the vignetting >>> that >>>>>>> CALVIEW shows for RGS is a combination of the telescope vignetting (fn of > >>>>>>> theta), the RGS obscuration factor (function of phi) and the RGS >>>>>>> self-vignetting factor (function of Beta). >>>>>>> >>>>>>> CALVIEW can show what he think you want by putting, >>>>>>> >>>>>>> e.g. order=-1, E=600 eV, Theta=100" >>>>>>> >>>>>>> and then View->
From: "Broersen, Sjors" <S.Broersen@uva.nl> To: Nora Loiseau <xmmhelp@sciops.esa.int> Subject: Re: calview RGS (PR#49762) Date: Sat, 24 Mar 2012 11:19:26 +0000
--_000_F67F28EEE69F4820A886F593C1731654uvanl_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Dear Nora, Thanks for your reply. I want, however the vignetting in the direction of t= he dispersion axis, not the cross dispersion axis. In this calibration docu= ment, http://www.sron.nl/divisions/hea/xmm/internal/documents//rgs-sron-tn-= cal-98_002.pdf, the top half of figure 8 shows the response as a function o= f off-axis angle. The linear line are the data. While the mirror vignetting= is clearly symmetric, the vignetting is clearly not. This is to be expecte= d, because the grating is positioned at a certain angle with respect to the= incoming photons. A change in the angle of the incoming photon in one dire= ction will thus have a different effect than a change in the other directio= n, because the beam size on the grating changes among with the reflection e= fficiency. (the instrument size is 300" this is why it is cut). This I don't really understand. I know that the field of view (FOV) of the = RGS is about 5' in the cross dispersion direction. However, in the dispersi= on direction the FOV is much larger. Could you elaborate on the above two points a bit more? Thanks, Sjors On Mar 23, 2012, at 4:58 PM, Nora Loiseau wrote: Dear Sjors, The solution is the same as was used in Vink et al. 2003 (Slow temperature equilibration behind the shock front of SN 1006) and is to convolve the response matrix with the emission profile of the source. We agree with this. This is also similar to XSPEC module rgsrmfsmooth, which doesn't take vignetting into account. I have a description of the offaxis response, obtained by plotting it in calview and making an ascii dump of it. However, the offaxis response for negative theta should be different from positive theta, due to the layout of the instrument. In calview theta is defined as the off-axis distance (in arcsec) of a certa= in point to the center of the field of view, and phi is the angle measured counter-clockwise from the dispersion axis. To know the effect of vignetting along the cross-dispersion axis, you can p= ut phi=3D90 (i.e. to be in the positive cross-dispersion axis), and then you = can get the plot of vignetting (or effective area) versus distance for theta from 0 to about 1200" (the instrument size is 300" this is why it is cut). To get the plot for the other (negative) half cross dispersion axis you can= put phi=3D270, and you will notice that vignetting is symmetric. For more details please see: http://xmm2.esac.esa.int/external/xmm_sw_cal/calib/documentation/CALHB/node= 7.html Best regards, Nora ---- Dr. Nora Loiseau XMM-Newton User Support Group This message and any attachments are intended for the use of the addressee = or addressees only. The unauthorised disclosure, use, dissemination or copy= ing (either in whole or in part) of its content is not permitted. If you re= ceived this message in error, please notify the sender and delete it from y= our system. Emails can be altered and their integrity cannot be guaranteed = by the sender. Please consider the environment before printing this email. --_000_F67F28EEE69F4820A886F593C1731654uvanl_ Content-Type: text/html; charset="us-ascii" Content-ID: <022919A75B264D4B81A900B2D9557455@uva.nl> Content-Transfer-Encoding: quoted-printable <html> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"= > </head> <body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin= e-break: after-white-space; "> <div>Dear Nora,</div> <div><br> </div> <div>Thanks for your reply. I want, however the vignetting in the direction= of the dispersion axis, not the cross dispersion axis. In this calibration= document, <a href=3D"http://www.sron.nl/divisions/hea/xmm/internal/do= cuments//rgs-sron-tn-">http://www.sron.nl/divisions/hea/xmm/internal/docume= nts//rgs-sron-tn-</a>cal-98_002.pdf, the top half of figure 8 shows the response as a function of off-axis angl= e. The linear line are the data. While the mirror vignetting is clearly sym= metric, the vignetting is clearly not. This is to be expected, because the = grating is positioned at a certain angle with respect to the incoming photons. A change in the angle of the i= ncoming photon in one direction will thus have a different effect than a ch= ange in the other direction, because the beam size on the grating changes a= mong with the reflection efficiency. </div> <div><br> </div> <div> <blockquote type=3D"cite"> <div>(the instrument size is 300" this is why it is cut).</div> </blockquote> </div> <div><br> </div> <div>This I don't really understand. I know that the field of view (FOV) of= the RGS is about 5' in the cross dispersion direction. However, in the dis= pers
From: "Broersen, Sjors" <S.Broersen@uva.nl> To: Nora Loiseau <xmmhelp@sciops.esa.int> Subject: Re: calview RGS (PR#49762) Date: Tue, 27 Mar 2012 10:49:54 +0000
Thanks Nora, this is exactly what I needed to know! If you think this email conversation might be useful for other RGS users, feel free to make it public. Cheers, Sjors On Mar 27, 2012, at 12:29 PM, Nora Loiseau wrote: > Dear Sjors > > The task 'calview' is intended to visualise some of the most relevant > instrumental details, not to access the calibration data themselves. Then, > though extremely useful, this task lacks some flexibility to select all possible > parameters and/or options. > > Therefore in some cases, it might be necessary to access the CCF directly to > examine the calibration data in detail. > > For the normal processing of the data, this is not needed, as SAS takes into > account all necessary corrections. > > The grating efficiency as a function of incidence angle, as you mentioned in a > previous mail, is stored in extension #11 of the CCF RGSX_QUANTUMEF_00XX.CCF > (extension RGA_EFF) (see a brief description of the contents and structure of > the different CCFs in the Calibration Handbook: > http://xmm2.esac.esa.int/external/xmm_sw_cal/calib/documentation/CALHB/node653.html > ) > > There, the grating efficiency is given for 60 wavelengths (from 5 to 60 A), and > 27 incidence angles,from 0.28 to 2.98 degrees. > > This incidence angle is defined as > > alpha = alpha0 + disp > > being alpha0 the nominal on-axis incidence angle (1.576191 deg), and 'disp' the > angular distance in the dispersion direction (i.e. disp can be positive or > negative). > > The header of this extension contains also information about the RGA > self-vignetting, through the keyword BETA_VIG, see > http://xmm2.esac.esa.int/external/xmm_sw_cal/calib/documentation/CALHB/node433.html. > > Best regards, > > Nora > ---- > Dr. Nora Loiseau > XMM-Newton User Support Group > > This message and any attachments are intended for the use of the addressee or addressees only. The unauthorised disclosure, use, dissemination or copying (either in whole or in part) of its content is not permitted. If you received this message in error, please notify the sender and delete it from your system. Emails can be altered and their integrity cannot be guaranteed by the sender. > > Please consider the environment before printing this email. >
From: "Broersen, Sjors" <S.Broersen@uva.nl> To: Nora Loiseau <xmmhelp@sciops.esa.int> Subject: Re: PRIVATE: calview RGS (PR#49762) Date: Thu, 29 Mar 2012 09:55:14 +0000
Dear Nora, One final question: What is the source of the off-axis response data in the RGSX_QUANTUMEF_00XX.CCF file? Is it in-flight calibration or ground measurements? Thanks, Sjors On Mar 27, 2012, at 1:50 PM, Nora Loiseau wrote: > Dear Sjors, > > yes, thanks, I am making it public. > > Cheers, > > Nora > > >> Thanks Nora, this is exactly what I needed to know! >> >> If you think this email conversation might be useful for other RGS users, > feel >> free to make it public. >> >> Cheers, >> Sjors >> >> On Mar 27, 2012, at 12:29 PM, Nora Loiseau wrote: >> >>> Dear Sjors >>> >>> The task 'calview' is intended to visualise some of the most relevant >>> instrumental details, not to access the calibration data themselves. Then, >>> though extremely useful, this task lacks some flexibility to select all >> possible >>> parameters and/or options. >>> >>> Therefore in some cases, it might be necessary to access the CCF directly to >>> examine the calibration data in detail. >>> >>> For the normal processing of the data, this is not needed, as SAS takes into >>> account all necessary corrections. >>> >>> The grating efficiency as a function of incidence angle, as you mentioned in > a >>> previous mail, is stored in extension #11 of the CCF RGSX_QUANTUMEF_00XX.CCF >>> (extension RGA_EFF) (see a brief description of the contents and structure > of >>> the different CCFs in the Calibration Handbook: >>> http://xmm2.esac.esa.int/external/xmm_sw_cal/calib/documentation/CALHB/node653.html >>> ) >>> >>> There, the grating efficiency is given for 60 wavelengths (from 5 to 60 A), >> and >>> 27 incidence angles,from 0.28 to 2.98 degrees. >>> >>> This incidence angle is defined as >>> >>> alpha = alpha0 + disp >>> >>> being alpha0 the nominal on-axis incidence angle (1.576191 deg), and 'disp' >> the >>> angular distance in the dispersion direction (i.e. disp can be positive or >>> negative). >>> >>> The header of this extension contains also information about the RGA >>> self-vignetting, through the keyword BETA_VIG, see >>> http://xmm2.esac.esa.int/external/xmm_sw_cal/calib/documentation/CALHB/node433.html. >>> >>> Best regards, >>> >>> Nora >>> ---- >>> Dr. Nora Loiseau >>> XMM-Newton User Support Group >>> >>> This message and any attachments are intended for the use of the addressee > or >> addressees only. The unauthorised disclosure, use, dissemination or copying >> (either in whole or in part) of its content is not permitted. If you received >> this message in error, please notify the sender and delete it from your > system. >> Emails can be altered and their integrity cannot be guaranteed by the sender. >>> >>> Please consider the environment before printing this email. >>> >> >> >> ---- > Dr. Nora Loiseau > XMM-Newton User Support Group > > This message and any attachments are intended for the use of the addressee or addressees only. The unauthorised disclosure, use, dissemination or copying (either in whole or in part) of its content is not permitted. If you received this message in error, please notify the sender and delete it from your system. Emails can be altered and their integrity cannot be guaranteed by the sender. > > Please consider the environment before printing this email. >
From: Rosario Gonzalez Riestra <xmmhelp@sciops.esa.int> To: S.Broersen@uva.nl Subject: Re: calview RGS (PR#49762) Date: Fri Mar 30 14:37:53 2012
Dear Sjors, I am aswering you on behalf of Nora, that is on mission. Most of the calibrations included in the QUANTUMEF CCF come from ground measurements. Some other corrections (e.g. RGS1 to RGS2 and 2nd to 1st order correction factors), as detailed in the "RGS Calibration Status document" [http://xmm2.esac.esa.int/docs/documents/CAL-TN-0030.pdf] were derived from observations. Regards Rosario Gonzalez-Riestra XMM-SOC User Support Group