XMM EPIC MOS Andy Read (amr30@star.le.ac.uk)†8 th EPIC BG WG Meeting Mallorca, Spain...

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Transcript of XMM EPIC MOS Andy Read (amr30@star.le.ac.uk)†8 th EPIC BG WG Meeting Mallorca, Spain...

  • Slide 1
  • XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) 8 th EPIC BG WG Meeting Mallorca, Spain 30/03/09 EPIC BG working group: 8th meeting: 30/03/09 Mallorca Location : Hotel Delfin Mar, Santa Ponsa, Mallorca Agenda ~15:00 - ~18:00 [Minutes - IdC] Introduction and action items from last meeting [AR] The status of the Blank Sky files and software[JC] The EPIC-MOS background[KK] Integrating ESAS into SAS[CG] SOC view of the FWC data[IdC] Discussion: Web Pages, BG Components, FWC data, new scripts/tools, long-term BG trends etc. [AR + all] Summing-up - AOB - Plans for the next period - Next meeting
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  • XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) 8 th EPIC BG WG Meeting Mallorca, Spain 30/03/09 Apologies: MJF SS
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  • XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) 8 th EPIC BG WG Meeting Mallorca, Spain 30/03/09 Open Action Items from Minutes (1/2) AI_EPIC_BG_WG_01_12: on MF: Once any BG or Closed fits files had been obtained, the user can change their CCF_PATH etc. setup so that a new cifbuild would incorporate these extra files. This enables the BG/Closed events files (e.g. the ones used in SS's task) to be used in the SAS, without them having to be included in the CCF files. - ONGOING - Interface TBD (MF & RS) AI_EPIC_BG_WG_03_07: on ME: test soft proton screening s/w SAS tool.espfilt. v0.8.2 available in SAS 7.1: MOS & pn data looks OK, some plotting range adjustments needed. 4/5th CLOSED ? AI_EPIC_BG_WG_03_08: on MF: UHB update section 3.2.4: outside FoV eff. area (up to 80 arcmin), Update of CCF (currently not supported, calview, 15 arcmin, TBC) OPEN. provide numbers from simulations by B. Aschenbach AI_EPIC_BG_WG_03_10: on SM: provide BGWG with script on bkg treatment in spectral analysis (after publication of related paper). OPEN AI_EPIC_BG_WG_03_11: on AR: check HK parameters for anomalous MOS FWC data - ONGOING AI_EPIC_BG_WG_04_02: on SS/K. Kuntz: try to extend MOS tools such that they also work for EPIC-pn by about June 2007. ONGOING AI_EPIC_BG_WG_04_08: on AR: trigger the generation of smaller sub-sets of EPIC-pn FWC data (with M. Freyberg) update of FWC web page needed. OPEN - ONGOING
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  • XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) 8 th EPIC BG WG Meeting Mallorca, Spain 30/03/09 Open Action Items from Minutes (2/2) AI_EPIC_BG_WG_06_01: On SS/KK: After reception of more 10 ksec FWC data, re-discuss observing strategy: is it useful to collect FWC at start/end of orbit or during slew observations? OPEN - discuss AI_EPIC_BG_WG_06_03: On SS/ME: release of a new ESAS (MOS only) version updated for SAS v7.1 - OPEN/ONGOING ? AI_EPIC_BG_WG_06_05: On WP: ask M. Bauer about the possibility to convert the new BG handling method into a script/tool for general usage - OPEN (to be released as web page?) CLOSED web page AI_EPIC_BG_WG_06_06: On WP: ask M. Bauer to compare the new method with the principal method used by XMM-ESAS, i.e. not subtracting but modelling of the background; SS is interested to help when files are available from M. Bauer OPEN - CLOSED M. Bauer left astronomy AI_EPIC_BG_WG_06_07: On SM: to provide new threshold numbers for the Fin/Fout tool to AR to allow him another update of that script (specifically to account for the MOS1 CCD6 loss). OPEN
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  • XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) 8 th EPIC BG WG Meeting Mallorca, Spain 30/03/09 New Action Items from Minutes AI_EPIC_BG_WG_07_01 On JC: to provide ME with a list on major performed updates on blank sky files (as input for next UG meeting report) CLOSED AI_EPIC_BG_WG_07_02 On ME: to draft next UG presentation and distribute to AR/SS for check and comments CLOSED AI_EPIC_BG_WG_07_03 On JC: to draft a section on the release of BGSelector for an XMM-Newton Newsletter CLOSED AI_EPIC_BG_WG_07_04 On JC: to provide descriptions of limitations of refilled blank-sky event files on the blank sky web page (Watchout section) and continue investigation of possible solutions to ghosting problem CLOSED AI_EPIC_BG_WG_07_05 On JC: to provide descriptions on the scaling of exposure maps and on the workaround for the skycast problem (both related to blank sky fields) on the blank sky web page CLOSED AI_EPIC_BG_WG_07_06 On JC & AR: to include descriptions mentioned under AI_WG_07_05 also in related scripts and tools CLOSED AI_EPIC_BG_WG_07_07 On CG & IC: to check BGWG pages from a users point of view and to provide ideas for further improvement of the documentation -? AI_EPIC_BG_WG_07_08 On CG & IC: to consider preparation of simple analysis threads and recipes for the analysis of extended sources (mentioning complexity & different approaches) -? AI_EPIC_BG_WG_07_09 On CG: clarify (with R. Saxton) arfgen problem reported by S. Snowden which is related to the planned ESAS update -?
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  • XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) 8 th EPIC BG WG Meeting Mallorca, Spain 30/03/09
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  • XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) 8 th EPIC BG WG Meeting Mallorca, Spain 30/03/09 Changes to the Web Pages
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  • XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) 8 th EPIC BG WG Meeting Mallorca, Spain 30/03/09
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  • XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) 8 th EPIC BG WG Meeting Mallorca, Spain 30/03/09 Changes to the Web Pages
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  • XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) 8 th EPIC BG WG Meeting Mallorca, Spain 30/03/09
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  • XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) 8 th EPIC BG WG Meeting Mallorca, Spain 30/03/09 Changes to the Web Pages
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  • XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) 8 th EPIC BG WG Meeting Mallorca, Spain 30/03/09
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  • XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) 8 th EPIC BG WG Meeting Mallorca, Spain 30/03/09 Changes to the Web Pages
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  • XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) 8 th EPIC BG WG Meeting Mallorca, Spain 30/03/09 Changes to BGWG FWC Files Users reported problems using BGWG FWC datasets in sky co- ordinates (`corrupted` X/Y co-ordinates) Sky X/Y co-ordinates are meaningless (events collected from different pointings, and are in FWC mode anyway) Suggested (AR) fix to users: Skycast (i.e. attcalc) FWC file to fixed point in the sky To prevent re-occurrences, all the pn and MOS BGWG FWC datasets have been skycast to RA=0, Dec=0, PA=0 (IdC) These files have been checked (AR, IdC) and now replace the older files on the BGWG web pages
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  • XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) 8 th EPIC BG WG Meeting Mallorca, Spain 30/03/09 EPIC FWC Closed Observations in the RCP Needed to look at reducing FWC observation time Current situation: 12x10 ks per year in FWC 1 st proposal: Reduce to 2x10 ks per year in FWC pn OK - instrumental BG appears quite stable, but MOSs show some instrumental BG variability - every 6 months is too sparse Current proposal: 2x10 ks per year in FWC, plus every 4 th MOS slew in FWC (other 3 of 4 MOS slews in CAL CLOSED, [pn slews used for science]) This is not a problem for OPS Current proposal is acceptable by MOS and pn BG teams
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  • XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) 8 th EPIC BG WG Meeting Mallorca, Spain 30/03/09 End
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  • XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) 8 th EPIC BG WG Meeting Mallorca, Spain 30/03/09 ME Maria is asking about the long term planning for the filter wheel closed observations that we have introduced first as NRCO and now as routineEPIC calibration: There are several questions: - for how long will these dedicated observations be needed? -can they be done at the end/start of an orbit where there is a higher risk of radiation? I understand for this you first need to look into the recently collected data to see if there is a difference between observations done in different parts of the orbit - did you already find the time to look into these observations? -Question to pn:- is there a possibility to merge shorter extended full frame mode closed filter exposures to reach your calibration goals? The reason for asking is that currently the dedicated observations are rather long due to the very long instrument overhead time of this pn readout mode. If shorter & merged observations are fine for you as well, this could significantly reduce the time needed for these now routine cal observations.
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  • XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) 8 th EPIC BG WG Meeting Mallorca, Spain 30/03/09 MF I had not attended the relevant meeting when the NRCO had been discussed and initiated. So I cannot answer this for EPIC- pn(I guess MOS had been the driver for this). For EPIC-pn the main goal is to monitor the high-energy particle background (intensity, spectrum, spatial) induced in the camera. Therefore representative measurements are desired, i.e. Conditions during the FILTER=CLOSED exposures similar to those in guest observe observations. EPIC-pn has always used parasitically other calibration observations for FILTER=CLOSED set-up (in various instrument modes)for this purpose, preferentially in the middle of an orbit. Soft proton flares do not affect the goal of these FILTER=CLOSED exposures, however, radiation at the start/end of an orbit may doso (e.g. change in intensity of camera background).At the very highest levels also the spectrum may change. One idea at the EPIC-Cal (actually BGWG) Meeting was to add a new extension to EPIC-pn event files with the discarded column counter lightcurve as a particle background monitor. This, however, had increased the memory ne