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J/A+A/439/413       XMDS/VVDS 4σ catalogue             (Chiappetti+, 2005)

The XMM-LSS survey: The XMDS/VVDS 4σ catalogue. Chiappetti L., Tajer M., Trinchieri G., Maccagni D., Maraschi L., Paioro L., Pierre M., Surdej J., Garcet O., Gosset E., Le Fevre O., Bertin E., McCracken H.J., Mellier Y., Foucaud S., Radovich M., Ripepi V., Arnaboldi M. <Astron. Astrophys. 439, 413 (2005)> =2005A&A...439..413C
ADC_Keywords: Surveys ; X-ray sources ; QSOs Keywords: X-ray: general - surveys - quasars: general - catalogs Description: We present a catalogue of 286 X-ray sources with their optical identification taken from the XMDS survey (using the XMM-Newton EPIC instrument). This first version is limited to sources detected at 4σ at least in one energy band, AND falling in the area covered by the optical VVDS survey. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file xmds1.dat 160 364 The XMDS catalogue
See also: B/xmm : XMM-Newton Observation Log (XMM-Newton SOC, 2002) J/A+A/403/857 : VLA-VIRMOS Deep Field (Bondi+, 2003) J/ApJ/591/640 : XMM-LSS low-frequency radio counterparts (Cohen+, 2003) Byte-by-byte Description of file: xmds1.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Seq *Internal sequence identifier 6- 9 A4 --- --- [XMDS] 11- 26 A16 --- XMDS *Catalog name of the object 28- 29 I2 h RAh Right ascension (J2000) 31- 32 I2 min RAm Right ascension (J2000) 34- 37 F4.1 s RAs Right ascension (J2000) 39 A1 --- DE- Declination sign (J2000) 40- 41 I2 deg DEd Declination (J2000) 43- 44 I2 arcmin DEm Declination (J2000) 46- 49 F4.1 arcsec DEs Declination (J2000) 51- 56 F6.1 ct CountB Number of net counts in 0.5-2keV band 58- 61 F4.1 ct e_CountB Error on CountB 63- 67 F5.1 ct CountCD Number of net counts in 2-10keV band 69- 72 F4.1 ct e_CountCD Error on CountCD 74- 78 F5.1 10-18W/m2 FluxB Flux in 0.5-2keV band 80- 84 F5.1 10-18W/m2 FluxCD flux in 2-10keV band 86- 87 A2 --- bBand *[A B CD] band which has highest S/N ratio 89 I1 --- Gap *[0/2]? Gap flag 91 I1 --- Rank *[0/4] Identification rank 93- 96 F4.1 arcsec DistXO *? Distance between X-ray source and counterpart 98-102 F5.2 mag Rmag *? R magnitude of counterpart 104-107 F4.2 mag e_Rmag ? Error on Rmag 109-113 F5.2 mag Imag *? I magnitude of counterpart 115-118 F4.2 mag e_Imag ? error on Imag 120 I1 --- Opt *[0/2]? photometry reliability flag 122 A1 --- VR *[V] Presence of radio counterpart in VIMOS1.4GHz (J/A+A/403/857) 124 A1 --- LR *[L] Presence of radio counterpart in XMM-LSS 325MHz (J/ApJ/591/640) 126-155 A30 --- CatName *Name of counterpart in external catalogues 157-160 I4 --- --- Repetition of Seq column
Note on Seq: If the X-ray source has more possible counterparts, all X-ray columns from Name to Gap are repeated. Note on XMDS: Name of the object, built from uncorrected J2000 coordinates as provided by the XMM-SAS. The coordinate columns actually provide corrected positions which frequently differ from the last digits in the RA and DEC parts of the name. Note on bBand: The X-ray energy band which has the best S/N ratio is coded as follows: A = 0.3-0.5 keV B = 0.5-2.0 keV C = 2.0-4.5 keV D = 4.5-10 keV CD = 2-10 keV Note on Gap: This flag indicates the reliability of the X-ray flux, due to the fact the source falls on inter-CCD gaps in one or more of the EPIC cameras, or close to the edge (or outside) of the FOV of one EPIC camera and is based on the ratio of the punctual exposures in each camera to the maximum exposure in the FOV also for each camera. The coding is as follows: 0 = maximum reliability, no problems 1 = fair reliability, X-ray position could fall near a CCD border or gap 2 = poor reliability, X-ray position almost surely falls close to CCD border or gap) An additional code of -1 indicates the fact the source falls outside of the FOV in at least one camera (this does not occur for the present subsample) Note on Rank: The rank gives the quality of the identification with the counterpart, coded as follows: 0 = optimal (e.g. only counterpart, or brightest and closest) 1 = good 2 = ambiguous (e.g. typically more than one possible counterparts listed) 4 = blank field (unidentified source) Note on DistXO: The distance between the X-ray source position and, in the following order of preference: - the VVDS optical counterpart (if any) - or the radio counterpart in the VIMOS1.4GHz catalogue (Bondi et al., 2003, Cat. J/A+A/403/857) - or the radio counterpart in the XMM-LSS 325MHz catalogue (Cohen et al., 2003, Cat. J/ApJ/591/640 - or the catalogued NED object - or the catalogued SIMBAD object It is blank if there are no counterparts. Note on Rmag and Imag: This note applies to all optical columns from Rmag to e_Imag inclusive. The magnitudes are given when there is a valid measurement in the VVDS catalogue. They may be left blank in case of radio counterparts only, or of (usually very bright) objects present only in external (SIMBAD) catalogues Note on Opt: This flag gives the quality of the VVDS photometry, as follows: 0 = magnitudes flagged as good 1 = magnitudes flagged as possibly bad, but not saturated 2 = magnitudes flagged as bad because saturated Note on VR: A "V" in this column indicates an association with a radio source in the or the radio counterpart in the VIMOS1.4GHz catalogue (Bondi et al., 2003, Cat. J/A+A/403/857). Otherwise the column is left blank Note on LR: A "L" in this column indicates an association with a radio source in the of the radio counterpart in the XMM-LSS 325 MHz catalogue (Cohen et al., 2003, Cat. J/ApJ/591/640). Otherwise the column is left blank Note on CatName: The name of the counterpart in external sites like NED or SIMBAD or in the XMM-LSS 325 MHz catalogue (Cohen et al., 2003, Cat. J/ApJ/591/640) (preferred order). The VIRMOS 1.4GHZ catalog (Bondi et al., 2003, Cat. J/A+A/403/857) is in SIMBAD.
Acknowledgements: Lucio Chiappetti, lucio(at) History: * 06-May-2005: Original version * 24-Jan-2006: ReadMe revisited (note on XMDS column)
(End) Patricia Vannier [CDS] 06-May-2005
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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