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XMM EPIC MOS Andy Read for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 EPIC Background Working Group Summary: Meeting.

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Presentation on theme: "XMM EPIC MOS Andy Read for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 EPIC Background Working Group Summary: Meeting."— Presentation transcript:

1 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 EPIC Background Working Group Summary: Meeting 11/04/07

2 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 BG web pages accessible from main XMM web page

3 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07

4 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07

5 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 XMM-ESAS : Example (SS/KK) XMM-ESAS processing of the two observations of Abell 1835 yield the same results. Temperature radial profiles for A1835 from two separate observations. Two observations have very different background conditions – one is very low BG – one is very soft proton flare dominated

6 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 XMM-ESAS : Background Subtracted and Exposure Corrected Images Background subtracted and exposure corrected images of Abell 1795 •2.0-8.0 keV •0.35-1.25 keV

7 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 XMM-ESAS - Mosaicked Images Mosaic of M101 observations.

8 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07

9 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 Blank Sky Analysis JAC/AMR Current status, April 2007 Files+software being used, comments + suggestions/questions coming in Paper published: A&A, 464, 1155, 2007 File issues from several users – dealt with individually – new products released/to be released RA/Dec Selector tool - trial in java Event Ghosting tool – available on web already: http://www.star.le.ac.uk/~jac48/tools/

10 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 A&A, 464, 1155, 2007A&A, submitted Papers accepted, submitted, in preparation...

11 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07

12 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 New MOS FWC files (each ~65MB) created from all of the FWC data for which: All chips were on in full imaging mode All chips were in their "normal" state

13 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 Can create images, spectra and time-series using XMM-SAS All-CCD pn multi-exposure-stacked FWC data (all modes) are also available

14 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07

15 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 Compares the flux in and out of the FOV for any EPIC event file to estimate the amount of residual Soft Proton flare contamination…

16 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 SN2004dj in NGC 2403 (M. Ehle, R. Willatt, W. Pietsch, M. Bauer) Runs cifbuild, odfingest, epchain, emchain, (omichain) Performs gti file preparation, gti cleaning, cleans bad pixels and columns, subtracts ooT events (pn) Makes images, exposure maps, masks, smoothes images, makes combined exposure map and mask Weighs pn against MOS cameras in each band Use images, exposure maps, masks and weights to combine images from all cameras Script to perform image creation + cleaning + exposure correcting + smoothing + …

17 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 WR25 Carina Nebula

18 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 M 83

19 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 Soft Proton Flaring (KK/SS) (JAC/AMR looking at pn equivalent) Soft proton flaring is very dependent on the geometry of the observation. Plotted here is the good-time fraction as a function of time of year and position of XMM in its orbit. Plotted here is the good-time fraction as a function of position of XMM in its orbit. The black lines show the position of the magnetosheath. Large values of GSE-X occur during summer.

20 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 BG pages accessible from main XMM front page Talks from all meetings available at EPIC-cal site…

21 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07

22 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 RGS background count rate - sensitive to both soft protons (few 100s keV) plus higher energy radiation (MeVs),

23 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 Step 1 – Filter the Data and Extract Spectra • Comparing the de Luca and Molendi ratio criteria (8-12 keV band) and the fitted flux for screened observations does aid in the identification of observations affected by residual contamination.

24 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 Step 2 – Model the Quiescent Particle Background •Temporal variation of the 0.3-10.0 keV count rate from the CCD corners

25 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 Step 2 – Model the Quiescent Particle Background •Temporal variation of the (2.5-5.0)/(0.4-0.8) keV ratio from the CCD corners

26 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 MOS1-4 Anonymous State • Images from MOS1-4 in 0.3-1.0 keV an the anonymous anomalous state. Values are the counts ks -1 for one ninth of the CCD • Monthly FWC exposures of 10ks would produce 20 counts for each CCD ninth, enough for some tracking of the state and sufficient to produce 2160 counts/chip/year (enough for spectral analysis) in the standard state

27 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07

28 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 •OMC2

29 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07

30 XMM EPIC MOS Andy Read (amr30@star.le.ac.uk) for the BGWG CAL/OPS/BG Meeting Palermo, Sicily 11-13/04/07 Flare-Free Fraction Total Observation Time (max~80 ks) Flare-Free Fraction as a function of orbital position (using ~entire EPIC dataset) GSE-X points towards the sun. GSE-X-GSE-Y plane is the plane of the ecliptic. GSE-Z is towards the north pole. Red indicates higher values. The best observations are made: When the spacecraft is as far from the earth as possible and at 180 degrees from the sun. Towards the sun seems to be better than 90 degrees from the sun. Given the orbit, the best observations will be done in Winter. to Sun K.Kuntz

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