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J/A+A/493/339       XMM-Newton serendipitous Survey. V.      (Watson+, 2009)

The XMM-Newton serendipitous Survey. V. The second XMM-Newton serendipitous source catalogue. Watson M.G., Schroder A.C., Fyfe D., Page C.G., Lamer G., Mateos S., Pye J., Sakano M., Rosen S., Ballet J., Barcons X., Barret D., Boller T., Brunner H., Brusa M., Caccianiga A., Carrera F.J., Ceballos M., Della Ceca R., Denby M., Denkinson G., Dupuy S., Farrell S., Fraschetti F., Freyberg M.J., Guillout P., Hambaryan V., Maccacaro T., Mathiesen B., McMahon R., Michel L., Motch C., Osborne J.P., Page M., Pakull M.W., Pietsch W., Saxton R., Schwope A., Severgnini P., Simpson M., Sironi G., Stewart G., Stewart I.M., Stobbart A-M., Tedds J., Warwick R., Webb N., West R., Worrall D., Yuan W. <Astron. Astrophys. 493, 339 (2009)> =2009A&A...493..339W
ADC_Keywords: Surveys ; X-ray sources Keywords: catalogues - surveys - X-rays general Abstract: Pointed observations with XMM-Newton provide the basis for creating catalogues of X-ray sources detected serendipitously in each field. This paper describes the creation and characteristics of the 2XMM catalogue. The 2XMM catalogue has been compiled from a new processing of the XMM-Newton EPIC camera data. The main features of the processing pipeline are described in detail. The catalogue, the largest ever made at X-ray wavelengths, contains 246897 detections drawn from 3491 public XMM-Newton observations over a 7-year interval, which relate to 191870 unique sources. The catalogue fields cover a sky area of more than 500deg2. The non-overlapping sky are a is ∼360deg2 (∼1% of the sky) as many regions of the sky are observed more than once by XMM-Newton. The catalogue probes a large sky area at the flux limit where the bulk of the objects that contribute to the X-ray background lie and provides a major resource for generating large, well-defined X-ray selected source samples, studying the X-ray source population and identifying rare object types. The main characteristics of the catalogue are presented, including its photometric and astrometric properties The 2XMMi catalogue is available as Cat. IX/40 in VizieR. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file obs.dat 140 3491 XMM-Newton observations and exposures included in the 2XMM catalogue (IX/40) (table D1 in the paper) table1.dat 98 10 Data modes of XMM-Newton exposures included in the 2XMM catalogue target.dat 166 3504 2XMM catalogue fields and targets identifications (table D2 in the paper) notes.dat 80 149 Notes
See also: IX/40 : XMM-Newton 2nd Inc. Source Cat. (2XMMi) (XMM-SSC, 2008) J/A+A/428/383 : XMM-Newton Bright Serendipitous Survey (Della Ceca+, 2004) J/A+A/469/27 : XMM-Newton serendipitous survey. III (Carrera+, 2007) J/A+A/476/1191 : XMM-Newton serendipitous survey. IV (Barcons+, 2007) Byte-by-byte Description of file: obs.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Rev Satellite revolution number (consecutive in time) 6- 15 I010 --- ObsID Observation number 17- 19 I3 --- ODF ODF (Observation Data File) version number 21- 30 F10.6 deg RAdeg Right ascension in decimal degrees (J2000) 32- 41 F10.6 deg DEdeg Declination in decimal degrees (J2000) 43- 62 A20 --- Target Target name 64 I1 --- q_Target [0/5] Quality classification, 0=best (1) 66- 68 I3 --- Ndet Number of detections in the field 70- 72 I3 --- Ngood Number of good detections in the field 74- 76 A3 --- --- (PN[) 77 I1 --- PNexp [1/3]? Number of the PN exposures merged for the source detection 78 A1 --- --- (]) 80- 82 A3 --- PNft Filter of the PN exposures (2) 84- 87 A4 --- PNmd PN observing mode (3) 89- 94 I6 s PNtm ? Total exposure time of the PN exposures 96- 98 A3 --- --- (M1[) 99 I1 --- M1exp [1/3]? Number of the MOS1 exposures merged for the source detection 100 A1 --- --- (]) 102-104 A3 --- M1ft Filter of the MOS1 exposures (2) 106-110 A5 --- M1md MOS1 observing mode (3) 112-117 I6 s M1tm ? Total exposure time of the MOS1 exposures 119-121 A3 --- --- (M2[) 122 I1 --- M2exp [1/3]? Number of the MOS2 exposures merged for the source detection 123 A1 --- --- (]) 125-127 A3 --- M2ft Filter of the MOS2 exposures (2) 129-133 A5 --- M2md MOS2 observing mode (3) 135-140 I6 s M2tm ? Total exposure time of the MOS2 exposures
Note (1): Quality classification of the whole observation based on the area flagged as bad in the manual flagging process as compared to the whole detection area, see Sect 7.4. The quality flag as follows: 0 = nothing has been flagged 1 = 0%<area<0.1% of the total detection mask has been flagged 2 = 0.1%≤area<1% has been flagged 3 = 1%≤ area<10% has been flagged 4 = 10%≤area<100% has been flagged 5 = the whole field was flagged as bad Note (2): Filters are Med = Medium, Tck = Thick, Tn1 = Thin1, Tn2 = Thin2. Note (3): Observing modes from table1, as follows: PFW = (MOS) Prime Full Window: covering full FOV PPW2 = (MOS) Prime Partial W2: small central window PPW3 = (MOS) Prime Partial W3: large central window PPW4 = (MOS) Prime Partial W4: small central window PPW5 = (MOS) Prime Partial W5: large central window FU = (MOS) Fast Uncompressed: central CCD in timing mode RFS = (MOS) Prime Partial RFS: central CCD with different frame time (Refreshed Frame Store) PFWE = (PN) Prime Full Window Extended: covering full FOV PFW = (PN) Prime Full Window: covering full FOV PLW = (PN) Prime Large Window: half the height of PFW/PFWE
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 A3 --- Inst Instrument (PN or MOS) 6- 9 A4 --- md Observing mode 11- 36 A26 --- Name Designation of the mode 38- 98 A61 --- Comments Description of the mode
Byte-by-byte Description of file: target.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Rev Satellite revolution number (consecutive in time) 6- 15 I010 --- ObsID Observation number 17 A1 -- n_ObsID [*] indicates a note in notes.dat file (1) 19- 21 I3 --- SRC ?=- Source number per observation of the identified 23- 28 I6 --- DETID ?=- Detection ID of the identified target 30 A1 --- Fld Field classification (2) 32 A1 --- Crd [nps- ] Coordinate preference between proposal position and Simbad position (3) 34- 36 A3 --- Categ Proposal category as taken from the XSA (4) 38- 42 A5 --- Prog Proposal program as taken from the XSA (5) 44- 53 F10.6 deg RAdeg ? Proposal right ascension in decimal degrees (J2000) (6) 55- 64 F10.6 deg DEdeg ? Proposal declination in decimal degrees (J2000) (6) 66- 85 A20 --- Target Proposal target name 87- 96 F10.6 deg RASdeg ?=- Simbad right ascension in decimal degrees (J2000) 98-107 F10.6 deg DESdeg ?=- Simbad declination in decimal degrees (J2000) 109-111 A3 --- Type Simbad object type 113-144 A32 --- SName ?=--- Simbad name for the field 146-155 F10.6 deg RAXdeg ? XSA right ascension (J2000) (7) 157-166 F10.6 deg DEXdeg ? XSA declination (J2000) (7)
Note (1): a star indicates if there is a note for this observation or for this proposal-ID (repeated for the several observations for this proposal) in notes.dat file. Note (2): Field classification as follows: p = point or point-like source s = small extended (r<3arcmin) l = large extended (r>3arcmin) e = extended source of unknown extent f = field (all detections are potential targets) x = X-ray shadow experiment and similar, that is, only the spectra of fore- and background objects are of interest (though the location of the field should be considered as target) t = two clearly identified targets (e.g., a double star) n = there is no target associated with the field u = unknown target, i.e., the target could not be classified or is of unknown nature Note (3): Coordinate preference between (p) proposal position and (s) Simbad position, depending on which defined the target better; in case of offset positions (usually indicated in the field name from the proposal) (n) no preference is given. Note (4): Proposal category as taken from the XMM Science Archive (XSA) as follows: I = Stars, White Dwarfs and Solar System II = White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, ULXs and Black Holes III = Supernovae, Supernova Remnants, Diffuse Emission, and Isolated Neutron Stars IV = Galaxies and Galactic Surveys V = Groups of Galaxies, Clusters of Galaxies, and Superclusters VI = Active Galactic Nuclei, Quasars, BL Lac Objects, and X-ray Background VII = X-ray Background and Surveys Note (5): Proposal program as taken from the XSA as follows: GO = Guest Observer Cal = Calibration ToO = Targets of Opportunity Cha = Co-Chandra ESO = Co-ESO Trig = Triggered Large = Large Note (6): The proposal position refers to the position given by the observer; this position is placed at a specified detector location which depends on the prime instrument (EPIC or RGS) as indicated by the observer and which avoids chip gaps, dead spots etc, unless an offset is indicated by the investigator. Note (7): The XMM Science Archive (XSA) gives the coordinates of the prime instrument viewing direction which are corrected for the star tracker mis-alignment.
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 10 I010 --- ObsID Observation number 12- 80 A69 --- Note Text of the note
Acknowledgements: Mike Watson, mgw(at) References: Watson et al., Paper I 2001A&A...365L..51W Barcons et al., Paper II 2002A&A...382..522B Carrera et al., Paper III 2007A&A...469...27C, Cat. J/A+A/469/27 Barcons et al., Paper IV 2007A&A...476.1191B, Cat. J/A+A/476/1191 History: 23-Dec-2008: on-line data 09-Dec-2010: file target.dat corrected (erroneous minus signs in DESdeg)
(End) Patricia Vannier [CDS] 23-Oct-2008
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