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X-ray sky survey of bright, serendipitous sources with 2XMMi at the AIP

ESAC Summer Alumni Trainee Meeting 2009. X-ray sky survey of bright, serendipitous sources with 2XMMi at the AIP. Speaker: Alexander Kolodzig Origin: Humboldt-Uni Berlin, Germany Institute: AIP (Astronomical Institute Potsdam), Potsdam, Germany Tutor: Axel Schwope. The 2XMMi-Catalog.

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X-ray sky survey of bright, serendipitous sources with 2XMMi at the AIP

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  1. ESAC Summer Alumni Trainee Meeting 2009 X-ray sky surveyof bright, serendipitous sourceswith 2XMMi at the AIP Speaker: Alexander Kolodzig Origin: Humboldt-Uni Berlin, Germany Institute: AIP (Astronomical Institute Potsdam), Potsdam, Germany Tutor: Axel Schwope

  2. The 2XMMi-Catalog 2XMMi = The incremental second XMM-Newton serendipitous source catalogue • largest X-ray source catalogue (2009) 4117XMM-Newton observations (2000 – 2008) – each field is visually screened ~1.0% sky area covered independently 289083 rows of X-ray detections 221012 unique X-ray sources 300 columns of information per detection 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  3. source selection • selection conditions (among others): • inspired by Della Ceca et al. (2004) • bright sources: • SOFT-Band [0.5 - 4.5 keV] • Rate > 0.01 counts/sec Likelihood > 18 • HARD-Band [4.5 -12.0 keV] • Rate > 0.002 counts/sec Likelihood > 12 • serendipitous sources • just point sources • off axis angle ≥ 3 arcmin no center of the observation field • just certain Observation Field Classifications 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  4. source matching • matching with the catalogs: 1. SDSS (Sloan Digital Sky Survey) Data Release 6 2. BSS (XMM-Newton Bright Source Sample,Della Ceca et al. (2004)) • similar survey but of the BSS with 400 sources identified 3. NED (NASA/IPAC Extragalactic Database) 4. SIMBAD • identify possible optical counterparts • add information of: • optical magnitude • red shift • source type 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  5. SOFT-Band selection 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  6. SOFT-Band selection 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  7. HARD-Band selection 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  8. X-ray sky map • 2XMMi-Catalog (in ecliptic coordinates) 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  9. sky map ofidentified sources • SOFT-Band (in ecliptic coordinates) 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  10. sky map ofidentified sources • HARD-Band (in ecliptic coordinates) 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  11. distribution ofknown source types 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  12. distribution ofknown source types 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  13. sky map ofknown source types • SOFT-Band (in ecliptic coordinates) 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  14. sky map ofknown source types • HARD-Band (in ecliptic coordinates) 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  15. comparison ofstars, galaxies & QSO’s • ratio: X-ray flux / optical flux SOFT-Band HARD-Band 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  16. comparison ofstars, galaxies & QSO’s • optical flux [mag] vs. galactic latitude [deg] 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  17. comparison ofstars, galaxies & QSO’s • optical flux [mag] vs. galactic latitude [deg] 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  18. comparison ofstars, galaxies & QSO’s • optical flux [mag] vs. red shift [log(z)] 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  19. comparison ofstars, galaxies & QSO’s • optical flux [mag] vs. red shift [log(z)] 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  20. further applications • compare optical type and X-ray source • identify of additional or wrong optical counterparts • development of automatic type-identifying method for X-ray bright sources • new list of unknown, maybe interesting X-ray sources  characterisation of the X-ray sky 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  21. Thank You For Your Attention! Contributions or Questions? e-mail: alex_kolo@gmx.de

  22. Backup - Slides

  23. The 2XMMi-Catalog • 2XMMi-Catalog: • constructed by SSC (XMM-Newton Survey Science Centre) • serendipitous: found by coincidence 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  24. XMM-Newton Observatory 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  25. XMM-Newton Observatory • factsheet : • ESA Satellite, launched 1999 • most sensitive X-ray telescope (so far) • 3 independent X-ray cameras (PN, MOS1, MOS2) • energy range: 0.15 - 15 keV • field of view: 0.5 degree • 2 X-ray reflection grating spectrometers (RGS) • 1 independent optical/UV monitor (OM) • simultaneous longtime observations in x-ray and optical 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  26. XMM-Newton Observatory 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  27. Task - Overview • my tasks: 1. selecting the “bright, serendipitous sources” 2. matching with other catalogs 3. statistics 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  28. 1. Selecting • selection-conditions (among others): • serendipitous sources: • just point sources • Offaxis Angel ≥ 3 arcmin • no detection from the center of the observation field • Observation Field Classification: • f = all detections are potential target • n = the target was not detected or in the field 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  29. 1. Selecting • Selection-Conditions: • OBS_CLASS < 4 • Quality classification of the whole observation, <10% has been flagged • EP_EXTENT < 6 arsec • extent radius of a source detected, < 6" = point-source • M1,M2,PN_SubMode= “FullWindow/ExtentedWindow” • Tseries = True (has Light-Curve) • SPECTRA = True (has Spectra) • SUM_FLAG = 0 • summary flag of the source is derived from the EPIC flag, 0 = “none of the flags was set” • M2_OFFAX ≥ 3 arcmin, ≤ 13 arcmin just serendipitous sources • Rate and Likelihood for each BAND of the M2-Camera • SOFT: >0.01 counts/sec , Likelihood >18 • HARD: >0.002 counts/sec , Likelihood >12 • FIELD_CLASS: n,f just serendipitous sources • f - 'field', that is, all detections are potential target • n - the target was not detected or in the field , whole field is serendipitous 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  30. 1. Selecting • Data mainly from EPIC MOS2-Camera: • explained by the paper: http://xmmssc-www.star.le.ac.uk/XID/XMMBSDellaCeca04.pdf • detector pattern simplifies the analysis of the field • e.g. object source target is fully contained in the central chip • it has the best PSF • gaps between the EPIC MOS chips are narrower • sensitivity with the bright sources isn’t important 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  31. 2. Matching • Matching: • matching with coordinates (RA & DEC) • error-radius: 3arcsec • possible identification of wrong optical counterparts • Matching-Tool: “STILTS” (script-version of TOPCAT) • purpose: • identify possible optical counterparts • add Information of: • optical magnitude • red shift • source type 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  32. 2. Matching • matched with the following catalogs: 1. SDSS (Sloan Digital Sky Survey) Data Release 6 • 62.435sources (with known & unknown source types) • pre-matched catalog with 2XMMi 2. BSS (XMM-Newton Bright Source Sample, from SSC) • 400sources • similar but smaller survey of 2XMMi 3. NED (NASA/IPAC Extragalactic Database) • 163millionsources (with known & unknown source types) • Data-Extraction difficult 4. SIMBAD • 4.6 million sources 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  33. 3. Statistics offaxis angel distribution • Plot: normalized with the circle area 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  34. 3. Statistics • Results: Number of Sources SOFT HARD* Description 933 (0,4%) 217 (0,1%) serendipitous bright sources 468 (50%) 121 (56%)identify sources and known type 128 (14%) 23 (11%) identify sources but unknown type 337 (36%) 73 (34%) unknown sources (so far) *Hard-Band without “detections” which appear as well in the Soft-Band 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  35. 3. Statistics • Results: Number of Det./Src. SOFT HARD Stage 31711132 Det.: without Field-Class 1104543/234* Det.: total Selection 933 473/217*Src.: total Selection 0.42% 0.21%/0.10*% from now just source-numbers ? ?* identify with SDSS ?(?) ?*(?*) identify with BSS (additional) ?(?) ?*(?*) identify with NED (additional) ? (?%) ?* (?%) identify sources (known & unknown type) ? (?%) ?* (?%) unknown sources (so far) *Hard-Band without “detections” which appear as well in the Soft-Band 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  36. X-ray sky map • 2XMMi-Catalog (in ecliptic coordinates) 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  37. comparison ofstars, galaxies & QSO’s • X-ray flux [log(erg/(cm²s))] vs. red shift [log(z)] 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  38. comparison ofstars, galaxies & QSO’s • red shift [log(z)] vs. galactic latitude [deg] 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

  39. Overview • ? • ? • ? 2XMMi-Survey of bright sources at AIP - Alexander Kolodzig

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