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Screening Issues for 2XMM / Reprocessing

Screening Issues for 2XMM / Reprocessing. Anja Schröder, Univ of Leicester, UK. Outline. Reprocessing: all products 2XMM: additional automatic source flagging manual source flagging. Reprocessing. Screening for reprocessing. As part of the pipeline: Automatic source flagging

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Screening Issues for 2XMM / Reprocessing

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  1. Screening Issuesfor2XMM / Reprocessing Anja Schröder, Univ of Leicester, UK

  2. Outline • Reprocessing: all products • 2XMM: • additional automatic source flagging • manual source flagging

  3. Reprocessing

  4. Screening for reprocessing As part of the pipeline: • Automatic source flagging • Extraction of information about attitude shift and pileup • Easier presentation of PNG and PDF files To do manually: • View all html, PNG and PDF files • View images and source overlays • Give formalized comments about problems

  5. Screening for reprocessing: time estimate ODFs: 5137 in total (plus real-time observations from now on) Screening: ~ 20 minutes per ODF on average Man power in hours/week (excluding real-time screening): CESR 4 (+ ~full time from January) Saclay 5 MPE 5+5 AIP 5 OA full for 5 weeks LUX 20+8

  6. Screening for reprocessing: time estimate ODFs: 5137 in total (plus real-time observations from now on) Screening: ~ 20 minutes per ODF on average Man power in hours/week (excluding real-time screening): CESR 4 (+ ~full time from January) Saclay 5 MPE 5+5 AIP 5 OA full for 5 weeks LUX 20+8 __________ ~80 hours/week -> 21 weeks -> ~6 months

  7. Screening for reprocessing: Early revolutions Rev < 0054 – 0060: ‘new’ ODFs from commissioning phase and very early observations -> often testing of various modes etc -> not always recognized -> not processed properly? => how to screen?

  8. Automatic source flagging (dpssflag) • Flag 1: MASKFRAC (camera) < 0.5 • Flag 2: Near bright source (-> circle) • Flag 3: within extended (-> circle) • Flag 4 – 6: conditions for spurious extended sources (according to scheme by G. Lamer) • Flag 7: probably spurious extended source • Flag 8 – M1: on MOS 1 bright corner (central CCD/window) in bands 1, 2, 3 • Flag 9 – M1: near MOS 1 bright corner (central CCD/window) in bands 1, 2, 3 • Flag 8 - PN: on PN bright column in band 1

  9. Flag 1 and MOS1 flag 8 flag 1: red diamond (-> MASKFRAC) flag 8 for M1: red square

  10. PN flag 8: bright columns in band 1 PN band 1 image

  11. PN flag 8: bright columns in band 1 PN band 1 image 41% observations have at least one flag 9 31% of the flagged detections are apparently caused by a bright column

  12. Flag 2 & 4: near source flag 2:yellow circle point sources: r = 65*SQRT(RATE) rmin = 10" rmax = 400" => 91% of cases radius is fine flag 4 (not shown): prob. spurious extended detection

  13. Flag 3: in extended emission extended sources: r = 4 x EXT ["] rmax = 200” point sources src 1: EXT = 2.5 px src 2: EXT = 2.9 px

  14. Flag 3: in extended emission extended sources: r = 4 x EXT ["] rmax = 200” point sources flag 3:yellow diamonds

  15. Flag 5 & 7: probably spurious extended emission extended sources: r = 160” rate ratio <= 0.4 point sources flag 5/7: white ellipse

  16. Reprocessing: No automatic flags Not flagged are: • OOT events (-> spur detections when src piled up) • RGA reflection spike • single reflections:

  17. Screening Sources for 2XMM

  18. 2XMM Source Screening Source flagging: • automatic flagging done in the pipeline • additional automatic flagging (work in progress -> Masa): • OOT events • RGA scattered light spike • cannot automatically flag all spurious detections -> manual flagging is necessary for the catalogue !

  19. Additional automatic flagging: OOT events green and cyan: detections yellow: flags 2 and 3 white ellipse: likely spurious det if source piled-up -> OOT events are detected automatic flagging by: Masa Sakano

  20. Additional automatic flagging: RGA spike RGA scattered light spike … but no source

  21. Additional automatic flagging: RGA spike RGA scattered light spike … but no source

  22. Manual flagging: extended source point sources: r = 65*SQRT(RATE) extended sources: r = EXT ["]

  23. Manual flagging: extended source point sources: r = 65*SQRT(RATE) extended sources: r = EXT ["] ds9 contour: level: 3,5,10 smooth = 32 yellow polygon region: by hand

  24. Manual flagging: point source

  25. Manual flagging: point source yellow polygon region mask flag all sources within the region (warning flag only!) exclude inside region for sky coverage (log N – log S) conversion by: Maite Ceballos

  26. Screening for 2XMM: time estimate ODFs: 5137 in total Screening: 750 proprietary ~20% no EPIC data ~50%have no obvious spurious detections => ~1800 ODFs with <5 minutes per ODF Estimate: 2 persons at 2 hr/day: ~ 5 weeks

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