XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05 Blank sky data scripts Jenny Carter, University.

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XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05 Blank sky data scripts Jenny Carter, University of Leicester Andy Read, University of Leicester

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05 Plan Aim: Creation of long exposure blank sky BG event files A1 – Writing of the tasks/scripts Leicester A2 – Compiling list(s) of observationsLeicester/ESAC ?? A3 – Creating BG event and other filesESAC A4 – Stacking BG event and other filesLeicester - low BG, long duration observations, no diffuse sources, few central targets So far achieved: Using 2XMM pipeline products Script 1 – creates event files and exposure maps Script 2 – merges created event files Script 3 – merges created exposure maps

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05 General Procedure List of observations no bright sources, long exposure etc Create event lists and exposure maps Merge event lists and exposure maps One great big event list with an exposure map Per instrument, filter and mode combination:

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05 Background event file srcradius30″ gti threshold MOS (jjb)2 gti threshold PN (mjf)60 region – creates region files from the common source list evselect – remove sources tabgti – gti creation from background light curve evselect – pattern, energy and flag selection, keep out-of-FOV evselect – gti correction, flare removal

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05 Original pps product event fileSource-removed, BG-flare-filtered, plus energy, pattern, flag & FOV filtering BG Blank Sky data analysis

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05 Exposure map mask file – provided, to account for area lost in source removal attcalc – calculate sky-coordinates on mask file evselect – remove sources from sky mask evselect – create an area map evselect – make an exposure map image eexpmap – use the exposure map image to create an exposure map Finally, combine the area map and exposure map to create source removed exposure map

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05 Other products - Information file Contains summary on the run of script - Revolution number - Observation number - Instrument - Filter - Mode - ONTIME, original values - Fraction of original ONTIME removed / Flag in case of run failure

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05 Merging - Events extension - Exposure extensions - Adapts keywords, e.g. LIVETIME - Adapts primary header - Adapts events extension header - Exposure maps - Tested by creating images, spectra and lightcurves

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05 2XMM test runs - “Final” files in 2XMM reprocessing - 8 observations tested - Mean time reduced PN: Mean time reduced M1: Mean time reduced M2:

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05 Exposure maps

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05 Extensions and improvements Currently remove sources from the event files Left with holes IDL code to fill Called by BGcreate

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05 How to fill in holes … - Match the area of the hole to the area of a ring surrounding a hole - Copy the events in the ring - Randomise the DETX, DETY positions of these copied events inside the ring - Add these events to the event file - Consider complicated situations - (attcalc back to (0, 0, 0) to correct X, Y positions – in updated script)

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05 Exposure map mask file – provided, to account for area lost in source removal attcalc – calculate sky-coordinates on mask file evselect – remove sources from sky mask evselect – create an area map evselect – make an exposure map image eexpmap – use the exposure map image to create an exposure map Finally, combine the area map and exposure map to create source removed exposure map

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05 Example, MOS events events

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05 PN example

XMM EPIC MOS Jenny Carter 2 nd EPIC BG WG Meeting MPE, Germany 24/11/05-25/11/05 Observation list MOS1FFThin515/ e7 MOS1FFMedium659 / e7 MOS1FFThick87 / e6 MOS2FFThin541 / e7 MOS2FFMedium689 / e7 MOS2FFThick96 / e6 PNFFThin329 / e7 PNFFMedium343 / e7 PNFFThick52 / e6 PNFFextThin143 / e6 PNFFextMedium101 / e6 PNFFextThick10 / e5 Instrument Mode Filter N OBS Exp.time (s) Time threshold: 20 ks