XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06 EPIC BGWG XMM-Newton EPIC BackGround Working Group founded (~1 year ago) Steering and supervising committee to provide the user with clear information on the EPIC Background and (SAS)-Tools to treat the EPIC Background correctly for various scenarios (ESAC, Goddard, Leicester, MPE) Regular meetings (3 rd on 02/05/06) and telecons + presentations (SSC, NAM) Released: BG analysis web page with recommended information, papers, summary tables etc: XMM-ESAS XMM-Newton Extended Source Analysis Software package  model the quiescent particle background both spectrally and spatially for the EPIC MOS detectors XMM-Newton blank sky event files  used when the user has difficulty in extracting a suitable background region from their observation (clusters, SNRs, filled FOV etc…) Links to sets of closed EPIC event files Under development: SAS tool to perform professional flare screening for EPIC-MOS and EPIC-pn (SASdevel) XMM-ESAS for pn Various other BG analysis tools Long-term timeline of instrumental BG + soft proton flare spatial and spectral analysis Analysis of XRT+EPIC Straylight – out-of-FOV and out-of-window

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06 XMM-ESAS soft proton flare screening modeling the quiescent particle background both spectrally and spatially for the EPIC MOS detectors producing background spectra for user-defined regions of the detectors and background images (FITS standard) XMM-ESAS is based on the software used for the background modeling described in Snowden, Collier & Kuntz (2004, ApJ, 610, 1182). SS/KK Proton flare screening Fitted background subtracted spectrum Same fit as above but without the background subtracted from the data

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06 Background subtracted, exposure corrected, and Adaptively smoothed image of Abell 1795 in the keV band. XMM-ESAS

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06 Blank Sky Analysis Superposition of many pointed observations of pipeline product data from 2XMM – flare-cleaned, filtered, source-removed… Background events files and exposure maps - MOS1, MOS2, pn Mode (eFF, FF) Filter (thin, medium, thick) Type (filled, unfilled) Vignetting (with, without [Exp. Maps]) S/W Select BG events from a certain area of the sky Cast event files onto sky Re-project and rebin exposure maps onto sky All to match user’s own data and analysis Available from ESAC BG page Images from events files with sources removed Images from events files after event filling JAC/AMR

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06 Blank Sky Analysis MOS1FFThick123.01e5 MOS1FFMedium651.58e6 MOS1FFThin e6 MOS2FFThick133.44e5 MOS2FFMedium671.68e6 MOS2FFThin e6 PNFFThick102.37e5 PNFFMedium331.08e6 PNFFThin429.93e5 PNFFextThick PNFFextMedium304.62e5 PNFFextThin628.25e5 Instrument Mode Filter N OBS Exp.time (s)

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06 Instrumental BG for a typical MOS chip – KK/SS Rate Hardness Index

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06 Detector Phenomenology - Not all chips are well behaved…

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06 Detector Phenomenology •Not all chips are well behaved…

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06 Detector Phenomenology -Not all chips are well behaved… MOS1-4, MOS1-5, MOS2-2, MOS2-5 anomalous states occur at different times always characterized by high rates and low hardness

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06 Detector Phenomenology MOS1-4, MOS1-5, MOS2-2, MOS2-5 always characterized by high rates and low hardness due to low energy “plateau” “extra” component somewhat localized for some chips 2-5S2-5H keV

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06 MOS1-4, MOS1-5, MOS2-2, MOS2-5 “extra” component somewhat localized for some chips, but not so clear in other cases MOS1-4 anomalous state does not generally appear in the corner pixels Detector Phenomenology keV 1-4S1-4H

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06 Detector Phenomenology Summary of States S: “standard state” V: “verification” : 1-4, 2-2, 2-5 for Rev<41.5 H: “high”:1-4, 1-5, 2-5, detectable in corner pixels A: “anonymous”: 1-4, not detectable in corner pix. No other chip has yet been detected in A state But since A state can only be detected in FWC data… Need to understand what causes these states Are there detector parameters that can be used to detect these states independently? Particularly important for the A states!

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06 Soft Proton Flares

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06 Soft Proton Flares - Only small scale feature is low energy “hot” edge of MOS1-2, none seen in MOS2 - Distribution flat at low energies, peaked at higher energies

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06 EPIC Background Working Group: For updates on: knowledge, understanding, software (ESAS), files (blank sky, closed) etc. …

XMM EPIC MOS Andy Read EPIC CAL/OPS Meeting MPE, Germany 04-05/05/06