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Date: Mon, 2 Jul 2012 12:22:44 GMT From: angelgimenez@ua.es To: xmmhelp@sciops.esa.int Cc: angelgimenez@ua.es Subject: Pile-up in Cen X-3 observation: 0400550201
Full_Name: Angel Gimenez Submission from: (NULL) (193.145.230.6) Hello, I'm writting because using the Cen X-3 observation 0400550201, I have problems to remove the pile-up. I find some features around 2 keV that don't fit with the theoretical prediction and it doesn't fit better when I remove the central columns. Thanks for advance, Regards, Angel.
From: Matthias Ehle <xmmhelp@sciops.esa.int> To: angelgimenez@ua.es Subject: Re: Pile-up in Cen X-3 observation: 0400550201 (PR#50461) Date: Tue Jul 3 07:21:58 2012
Dear Angel, the recommended method to check if pile-up is still an issue, even after cutting out the central emisison peak is described in our thread http://xmm.esac.esa.int/sas/current/documentation/threads/epatplot.shtml i.e. use epatplot to check if the pattern distribution in your created event list agrees with model predictions. Please have a look at it. If there are significant deviations still, more central flux will need to be excised, unfortunately. You might also find the following threads useful that discuss the generation of spectra for MOS and pn in timing mode: http://xmm.esac.esa.int/sas/current/documentation/threads/MOS_spectrum_thread.shtml http://xmm.esac.esa.int/sas/current/documentation/threads/PN_spectrum_timing_thread.shtml Regards, Matthias -- Dr Matthias Ehle XMM-Newton User Support Group European Space Astronomy Centre
Date: Tue, 03 Jul 2012 10:56:12 +0200 From: Angel Gimenez <angelgimenez@ua.es> To: Matthias Ehle <xmmhelp@sciops.esa.int> Subject: Re: Pile-up in Cen X-3 observation: 0400550201 (PR#50461)
This is a multi-part message in MIME format. --------------010807060100040209080409 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Dear Mathhias, What happens when the deviations are still present after removing most of the central flux? I have attached the epatplot result after removing the 'n' central columns ('n' is the number in the end of the files name). The source region I choose is 21 columns broad, but removing more columns the deviations don't improve. What should I do with this observation? On 07/03/2012 09:21 AM, Matthias Ehle wrote: > Dear Angel, > > the recommended method to check if pile-up is still an issue, even after > cutting out the central emisison peak is described in our thread > http://xmm.esac.esa.int/sas/current/documentation/threads/epatplot.shtml > i.e. use epatplot to check if the pattern distribution in your created > event list agrees with model predictions. Please have a look at it. > > If there are significant deviations still, more central flux will need to > be excised, unfortunately. > > You might also find the following threads useful that discuss the generation > of spectra for MOS and pn in timing mode: > http://xmm.esac.esa.int/sas/current/documentation/threads/MOS_spectrum_thread.shtml > http://xmm.esac.esa.int/sas/current/documentation/threads/PN_spectrum_timing_thread.shtml > > Regards, > Matthias > > -- > Dr Matthias Ehle > XMM-Newton User Support Group > European Space Astronomy Centre > > 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. --------------010807060100040209080409 Content-Type: application/postscript; name="pile-up_source_region.ps" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="pile-up_source_region.ps" %!PS-Adobe-3.0 EPSF-3.0 %%For: angel %%Title: PGPLOT PostScript plot %%Creator: PGPLOT [PSDRIV 6.6] %%CreationDate: 2-Jul-2012 13:37 %%BoundingBox: (atend) %%DocumentFonts: (atend) %%LanguageLevel: 1 %%Orientation: Portrait %%Pages: (atend) %%EndComments %%BeginProlog /L {moveto rlineto currentpoint stroke moveto} bind def /C {rlineto currentpoint stroke moveto} bind def /D {moveto 0 0 rlineto currentpoint stroke moveto} bind def /LW {5 mul setlinewidth} bind def /BP {newpath moveto} bind def /LP /rlineto load def /EP {rlineto closepath eofill} bind def /MB {gsave translate MFAC dup scale 1 setlinewidth 2 setlinecap 0 setlinejoin newpath} bind def /ME /grestore load def /CC {0 360 arc stroke} bind def /FC {0 360 arc fill} bind def /G {1024 div setgray} bind def /K {3 -1 roll 1024 div 3 -1 roll 1024 div 3 -1 roll 1024 div setrgbcolor} bind def % Uncomment next line to convert color to grey shades %/K {3 -1 roll 3413 div 3 -1 roll 1739 div 3 -1 roll 9309 div add add setgray} bind def %%EndProlog %%BeginSetup /#copies 1 def %%EndSetup %%Page: 1 1 %%BeginPageSetup /PGPLOT save def 0.072 0.072 scale 350 250 translate 1 setlinejoin 1 setlinecap 1 LW 1 %%EndPageSetup %%PageBoundingBox: (atend) 1024 1024 1024 K 1 LW 0 0 BP 7800 0 LP 0 11029 LP -7800 0 EP 973 973 973 K 468 10698 BP 6552 0 LP 0 221 LP -6552 0 EP 0 0 0 K 0 -63 5763 10829 L 6 6 5763 10820 L 6 3 C 9 0 C 6 -3 C 6 -6 C 3 -9 C 0 -6 C -3 -9 C -6 -6 C -6 -3 C -9 0 C -6 3 C -6 6 C 3 -3 5817 10850 L 3 3 C -3 3 C -3 -3 C 0 -42 5820 10829 L 0 -63 5844 10850 L 36 0 5865 10811 L 0 6 C -3 6 C -3 3 C -6 3 C -9 0 C -6 -3 C -6 -6 C -3 -9 C 0 -6 C 3 -9 C 6 -6 C 6 -3 C 9 0 C 6 3 C 6 6 C 54 0 5922 10814 L 0 -30 6000 10829 L 3 -9 C 6 -3 C 9 0 C 6 3 C 9 9 C 0 -42 6033 10829 L 0 -63 6057 10829 L 6 6 6057 10820 L 6 3 C 9 0 C 6 -3 C 6 -6 C 3 -9 C 0 -6 C -3 -9 C -6 -6 C -6 -3 C -9 0 C -6 3 C -6 6 C 54 0 6102 10781 L -3 6 6201 10820 L -9 3 C -9 0 C -9 -3 C -3 -6 C 3 -6 C 6 -3 C 15 -3 C 6 -3 C 3 -6 C 0 -3 C -3 -6 C -9 -3 C -9 0 C -9 3 C -3 6 C -6 -3 6234 10829 L -6 -6 C -3 -9 C 0 -6 C 3 -9 C 6 -6 C 6 -3 C 9 0 C 6 3 C 6 6 C 3 9 C 0 6 C -3 9 C -6 6 C -6 3 C -9 0 C 0 -30 6279 10829 L 3 -9 C 6 -3 C 9 0 C 6 3 C 9 9 C 0 -42 6312 10829 L 0 -42 6336 10829 L 3 9 6336 10811 L 6 6 C 6 3 C 9 0 C -6 6 6408 10820 L -6 3 C -9 0 C -6 -3 C -6 -6 C -3 -9 C 0 -6 C 3 -9 C 6 -6 C 6 -3 C 9 0 C 6 3 C 6 6 C 36 0 6426 10811 L 0 6 C -3 6 C -3 3 C -6 3 C -9 0 C -6 -3 C -6 -6 C -3 -9 C 0 -6 C 3 -9 C 6 -6 C 6 -3 C 9 0 C 6 3 C 6 6 C 54 0 6471 10781 L 0 -42 6540 10829 L 3 9 6540 10811 L 6 6 C 6 3 C 9 0 C 36 0 6576 10811 L 0 6 C -3 6 C -3 3 C -6 3 C -9 0 C -6 -3 C -6 -6 C -3 -9 C 0 -6 C 3 -9 C 6 -6 C 6 -3 C 9 0 C 6 3 C 6 6 C 0 -48 6666 10829 L -3 -9 C -3 -3 C -6 -3 C -9 0
From: Matthias Ehle <xmmhelp@sciops.esa.int> To: angelgimenez@ua.es Subject: Re: Pile-up in Cen X-3 observation: 0400550201 (PR#50461) Date: Tue Jul 3 11:26:43 2012
Dear Angel, looking at the epatplot plots, we think that the residuals you see around 2 keV actually are due to an effect described in the following CCF Release Note: http://xmm2.esac.esa.int/docs/documents/CAL-SRN-0265-1-1.ps.gz i.e. they actually have nothing to do with pile-up, rather with the calibration of the PATTERN fraction at source positions close to the macro-pixel border. Could you, please, still let us know source+background count rate in the 0.7-10 keV band? Regards, Matthias
Date: Tue, 03 Jul 2012 13:38:13 +0200 From: Angel Gimenez <angelgimenez@ua.es> To: Matthias Ehle <xmmhelp@sciops.esa.int> Subject: Re: Pile-up in Cen X-3 observation: 0400550201 (PR#50461)
This is a multi-part message in MIME format. --------------040207040508080609050801 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Dear Matthias, I have attached a fits file with the light curve including all the events with pattern<=4 and energy between 0.7-10 keV (I used: expression='#XMMEA_EP && (PI>700&&PI<10000) && (PATTERN<=4)') The count rate is around 500 c/s. Regards, Angel On 07/03/2012 01:26 PM, Matthias Ehle wrote: > Dear Angel, > > looking at the epatplot plots, we think that the residuals you see around 2 keV > > actually are due to an effect described in the following CCF Release Note: > http://xmm2.esac.esa.int/docs/documents/CAL-SRN-0265-1-1.ps.gz > > i.e. they actually have nothing to do with pile-up, rather with the calibration > > of the PATTERN fraction at source positions close to the macro-pixel border. > > Could you, please, still let us know source+background count rate in the > 0.7-10 keV band? > > Regards, > Matthias > > > > 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. --------------040207040508080609050801 Content-Type: application/octet-stream; name="rate_07-10kev.fits" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="rate_07-10kev.fits" U0lNUExFICA9ICAgICAgICAgICAgICAgICAgICBUIC8gZmlsZSBkb2VzIGNvbmZvcm0gdG8g RklUUyBzdGFuZGFyZCAgICAgICAgICAgICBCSVRQSVggID0gICAgICAgICAgICAgICAgICAg IDggLyBudW1iZXIgb2YgYml0cyBwZXIgZGF0YSBwaXhlbCAgICAgICAgICAgICAgICAgIE5B WElTICAgPSAgICAgICAgICAgICAgICAgICAgMCAvIG51bWJlciBvZiBkYXRhIGF4ZXMgICAg ICAgICAgICAgICAgICAgICAgICAgICAgRVhURU5EICA9ICAgICAgICAgICAgICAgICAgICBU IC8gRklUUyBkYXRhc2V0IG1heSBjb250YWluIGV4dGVuc2lvbnMgICAgICAgICAgICBYUFJP QzAgID0gJ2V2c2VsZWN0IHRhYmxlPWNsZWFuX29icy5maXRzIGZpbHRlcmVkc2V0PWZpbHRl cmVkLmZpdHMgd2l0aGZpbHRlcmUmJ0NPTlRJTlVFICAnZHNldD1ubyBrZWVwZmlsdGVyb3V0 cHV0PW5vIGZsYWdjb2x1bW49RVZGTEFHIGZsYWdiaXQ9LTEgZGVzdHJ1Y3Q9eSYnQ09OVElO VUUgICdlcyBkc3NibG9jaz0nJycnIGV4cHJlc3Npb249JycjWE1NRUFfRVAgJiYgKFBJPjcw MCYmUEk8MTAwMDApICYmIChQJidDT05USU5VRSAgJ0FUVEVSTjw9NCknJyBmaWx0ZXJ0eXBl PWV4cHJlc3Npb24gY2xlYW5kc3M9bm8gdXBkYXRlZXhwb3N1cmU9eWVzIGYmJ0NPTlRJTlVF ICAnaWx0ZXJleHBvc3VyZT15ZXMgd3JpdGVkc3M9eWVzIGJsb2Nrc3RvY29weT0nJycnIGF0 dHJpYnV0ZXN0b2NvcHkmJyAgQ09OVElOVUUgICc9JycnJyBlbmVyZ3ljb2x1bW49UEhBIHpj b2x1bW49V0VJR0hUIHplcnJvcmNvbHVtbj1FV0VJR0hUIHdpdGh6ZXJyJidDT05USU5VRSAg J29yY29sdW1uPW5vIHdpdGh6Y29sdW1uPW5vIGlnbm9yZWxlZ2FsbGltaXRzPW5vIGltYWdl c2V0PWltYWdlLmZpdHMmJ0NPTlRJTlVFICAnIHhjb2x1bW49UkFXWCB5Y29sdW1uPVJBV1kg eGltYWdlYmluc2l6ZT0xIHlpbWFnZWJpbnNpemU9MSBzcXVhcmVwaSYnQ09OVElOVUUgICd4 ZWxzPW5vIHhpbWFnZXNpemU9NjAwIHlpbWFnZXNpemU9NjAwIGltYWdlYmlubmluZz1pbWFn ZVNpemUgeGltYWdlJidDT05USU5VRSAgJ21pbj0xIHhpbWFnZW1heD02NDAgd2l0aHhyYW5n ZXM9bm8geWltYWdlbWluPTEgeWltYWdlbWF4PTY0MCB3aXRoeXImJ0NPTlRJTlVFICAnYW5n ZXM9bm8gaW1hZ2VkYXRhdHlwZT1SZWFsNjQgd2l0aGltYWdlZGF0YXR5cGU9bm8gcmFpbWFn ZWNlbnRlcj0wICYnQ09OVElOVUUgICdkZWNpbWFnZWNlbnRlcj0wIHdpdGhjZWxlc3RpYWxj ZW50ZXI9bm8gd2l0aGltYWdlc2V0PW5vIHNwZWN0cnVtc2V0JidDT05USU5VRSAgJz1zcGVj dHJ1bS5maXRzIHNwZWN0cmFsYmluc2l6ZT01IHNwZWNjaGFubmVsbWluPTAgc3BlY2NoYW5u ZWxtYXg9MTEmJ0NPTlRJTlVFICAnOTk5IHdpdGhzcGVjcmFuZ2VzPW5vIHdpdGhzcGVjdHJ1 bXNldD1ubyByYXRlc2V0PXJhdGVfMDctMTBrZXYuZml0cyYnQ09OVElOVUUgICcgdGltZWNv bHVtbj1USU1FIHRpbWViaW5zaXplPTEwMCB0aW1lbWluPTAgdGltZW1heD0xMDAwIHdpdGh0 aW1lcmFuJidDT05USU5VRSAgJ2dlcz1ubyBtYWtldGltZWNvbHVtbj15ZXMgbWFrZXJhdGVj b2x1bW49eWVzIHdpdGhyYXRlc2V0PXllcyBoaXN0b2cmJ0NPTlRJTlVFICAncmFtc2V0PWhp c3RvLmZpdHMgaGlzdG9ncmFtY29sdW1uPVRJTUUgaGlzdG9ncmFtYmluc2l6ZT0xIGhpc3Rv Z3JhbSYnQ09OVElOVUUgICdtaW49MCBoaXN0b2dyYW1tYXg9MTAwMCB3aXRoaGlzdG9yYW5n ZXM9bm8gd2l0aGhpc3RvZ3JhbXNldD1ubyAjIChlJidDT05USU5VRSAgJ3ZzZWxlY3QtMy42 MS4xKSBbeG1tc2FzXzIwMTIwNTIzXzE3MDItMTIuMC4wXScgICAgICAgICAgICAgICAgICAg ICAgIFhEQUwwICAgPSAncmF0ZV8wNy0xMGtldi5maXRzIDIwMTItMDctMDNUMTE6MzI6MjAu MDAwIENyZWF0ZSBldnNlbGVjdCAoZXZzZWxlYyYnQ09OVElOVUUgICd0LTMuNjEuMSkgW3ht bXNhc18yMDEyMDUyM18xNzAyLTEyLjAuMF0gSGlnaCBTQVNfTUVNT1JZX01PREVMPSBTQVNf JidDT05USU5VRSAgJ1JPV1M9IFNBU19aRVJPX1JPV1M9IFNBU19DT0xVTU5fV0lTRT0gJyAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgIENSRUFUT1IgPSAnZXZzZWxlY3QgKGV2c2Vs ZWN0LTMuNjEuMSkgW3htbXNhc18yMDEyMDUyM18xNzAyLTEyLjAuMF0nIC8gbmFtZSBvZiBj REFURSAgICA9ICcyMDEyLTA3LTAzVDExOjMyOjIwLjAwMCcgLyBjcmVhdGlvbiBkYXRlICAg ICAgICAgICAgICAgICAgICAgICAgICAgICBPUklHSU4gID0gJ0xlaWNlc3Rlci9TU0MnICAg ICAgLyBvcmlnaW4gb2YgRklUUyBmaWxlICAgICAgICAgICAgICAgICAgICAgICAgICAgIE9E U1ZFUiAgPSAnMTYuOTExICAnICAgICAgICAgICAvIE9EUyB2ZXJzaW9uICAgICAgICAgICAg I
From: Matthias Ehle <xmmhelp@sciops.esa.int> To: angelgimenez@ua.es Subject: Re: Pile-up in Cen X-3 observation: 0400550201 (PR#50461) Date: Tue Jul 3 13:54:21 2012
Dear Angel, I further discussed your report with the EPIC calibration scientist: We think that at the current state you should just continue with your spectral analysis. As far as we understand, all what you see are wiggles in the count spectrum. Do you positively know that these wiggles translate into residuals against the best-fit model? And of which size (in units of data/model ratio)? That the effective area has strong gradients around the Si and Au edge is well known. Normally, they are calibrated at a level better then 5%, once the data reduction and analysis is done following standard recommendations, see the EPIC and Cross calibration status documents available at http://xmm2.esac.esa.int/external/xmm_sw_cal/calib/index.shtml Regards, Matthias
Date: Tue, 03 Jul 2012 16:01:44 +0200 From: Angel Gimenez Garcia <angelgimenez@ua.es> To: Matthias Ehle <xmmhelp@sciops.esa.int> Subject: Re: Pile-up in Cen X-3 observation: 0400550201 (PR#50461)
Ok, I don't positively know if the wiggles translate into residuals, so I will go on with the spectral analysis. Thanks a lot :) Regards, Angel. On 07/03/2012 03:54 PM, Matthias Ehle wrote: > Dear Angel, > > I further discussed your report with the EPIC calibration scientist: > > We think that at the current state you should just continue with your spectral > analysis. As far as we understand, all what you see are wiggles in the count > spectrum. Do you positively know that these wiggles translate into residuals > against the best-fit model? And of which size (in units of data/model ratio)? > > That the effective area has strong gradients around the Si and Au edge is well > known. Normally, they are calibrated at a level better then 5%, once the > data reduction and analysis is done following standard recommendations, see > the EPIC and Cross calibration status documents available at > http://xmm2.esac.esa.int/external/xmm_sw_cal/calib/index.shtml > > Regards, > Matthias > > > > 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.