XMM EPIC MOS Andy Read OPS/CAL/BG (OCB) Meeting Mallorca, Spain 05-07/11/07 Report from the BGWG (05/11/07) Andy Read, on behalf of the EPIC-BGWG Jenny Carter, Matthias Ehle, Michael Freyberg, Kip Kuntz, Silvano Molendi, Wolfgang Pietsch, Steve Snowden
XMM EPIC MOS Andy Read OPS/CAL/BG (OCB) Meeting Mallorca, Spain 05-07/11/07 22 Matthias Ehle - SCI-OAX Reaction from User Group Meeting: 7-8 June 2007 (ME) Immediately after presentation: UG chair (M. Arnaud) expressed thanks for all the work done by EPIC BGWG R. Mushotzky asked about maintainability of ESAS plan is to get it into SAS Lack of enough FWC data to properly characterize instrumental BG deferred for general discussion M. Arnaud asked about tool to select blank sky fields based on galactic coordinates (not only RA/Dec). During Discussions: UG recognized and was impressed by tremendous amount of work done by BGWG ! Lack of enough FWC data to properly characterize instrumental BG Recommendation /45: The UG recommends that the BGWG makes a study of the needs for closed filter data This study exists as shown by S. Snowden during previous BGWG meeting “Filter Wheel Closed Calibration Observations” Quick solution: NRCO#70 approved for 2007 in August; now in EPIC routine cal plan: monthly 10 ksec dedicated FWC full frame exposures in ‘good part’ of orbit:
XMM EPIC MOS Andy Read OPS/CAL/BG (OCB) Meeting Mallorca, Spain 05-07/11/07 XMM-ESAS update (SS) Acceptance for publication of the Analysis Methods/Cluster Catalog Paper Available through Astro-Ph (and here) Acceptance for publication of the Particle Background Paper Available here (not yet in Astro-Ph) Modification required for SAS V7.1 Still a work in progress Requires patches which are not yet available PN Modifications Slow progress until MOS update for SAS 7.1 PN data processing by K.Kuntz ~finished -> Couple months of CPU
XMM EPIC MOS Andy Read OPS/CAL/BG (OCB) Meeting Mallorca, Spain 05-07/11/07 BGWG Blank Sky Summary (JAC/AMR) New release of files May 2007 addressing issues: low-E residual sources in some files small correction to vignetted exposure maps addition exposure maps with extra flags made available Updates to pages count rate graphs added in SSC bands Investigation/consideration of: ghosting problem, scaling of exposure maps, addition of new modes and increasing the size of the component file sets BGSelector tool improved, generic version of SelectRADec select on eq./gal coordinates, nH, revn., exposure, time ready for upload to pages keV
XMM EPIC MOS Andy Read OPS/CAL/BG (OCB) Meeting Mallorca, Spain 05-07/11/07 Fin_over_Fout [New – Available] Warnings put in regarding use of the MOS1 algorithm with post Rev-961 MOS1 CCD6 loss [New numbers calculated by SM – will be input v.soon] Smaller Scripts/Tasks - New
XMM EPIC MOS Andy Read OPS/CAL/BG (OCB) Meeting Mallorca, Spain 05-07/11/07 Input: ANY" Sky template: e.g.4.35"Sky output: 4.35" BGrebinimage2SKY [New – Available] Now can rebin and reproject any DETX/DETY image of any binning onto the sky to the spatial scale and sky X/Y position of a user input image Smaller Scripts/Tasks - New
XMM EPIC MOS Andy Read OPS/CAL/BG (OCB) Meeting Mallorca, Spain 05-07/11/07
XMM EPIC MOS Andy Read OPS/CAL/BG (OCB) Meeting Mallorca, Spain 05-07/11/07
XMM EPIC MOS Andy Read OPS/CAL/BG (OCB) Meeting Mallorca, Spain 05-07/11/07
XMM EPIC MOS Andy Read OPS/CAL/BG (OCB) Meeting Mallorca, Spain 05-07/11/07
XMM EPIC MOS Andy Read OPS/CAL/BG (OCB) Meeting Mallorca, Spain 05-07/11/07
XMM EPIC MOS Andy Read OPS/CAL/BG (OCB) Meeting Mallorca, Spain 05-07/11/07 Conclusions based mainly on RGS – within scatter, no difference between instruments EPIC-pn data more scarce & RGS on longer time at end of rev
XMM EPIC MOS Andy Read OPS/CAL/BG (OCB) Meeting Mallorca, Spain 05-07/11/07 Evolution of the BG (years) Instruments generally agree No clear trend in evolution of BG Largest changes seen at end of rev – peaks of BG increase from 2000 to and then decline
XMM EPIC MOS Andy Read OPS/CAL/BG (OCB) Meeting Mallorca, Spain 05-07/11/07 Evolution of the BG (months) Seasonal dependence due to asymmetry of the Earth’s magnetic field along the sun- antisun line. Beginning: Strong seasonal effect – high Feb-Aug – lower for rest of year – min in Dec & Jan – variation factor can be ~8 Apogee: Similar – marked minimum in Dec & Jan – variation only <3 (only <1.5 in Mar-Oct) End: Highest levels and strongest variations – Max in Apr (~8x Aug-Sep) – plus yearly effect
XMM EPIC MOS Andy Read OPS/CAL/BG (OCB) Meeting Mallorca, Spain 05-07/11/07 Evolution of the XMM BG (Years)
XMM EPIC MOS Andy Read OPS/CAL/BG (OCB) Meeting Mallorca, Spain 05-07/11/07 Evolution of the XMM BG (Months)
XMM EPIC MOS Andy Read OPS/CAL/BG (OCB) Meeting Mallorca, Spain 05-07/11/07