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Detailed Description of J/MNRAS/311/456 :
RIXOS source catalogue (Mason+, 2000)

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Note : this is the description file of the original catalog. This HTML page corresponds well to the original description, but some minor changes in the format may have been introduced in the FITS output files in order to allow for arithmetic operations on quantities such as coordinates and times. h:m:s and d:m:s units are normally converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the units; the value given in the HTML files supersedes the value indicated in the ReadMe file for this catalogue.
J/MNRAS/311/456     RIXOS source catalogue                   (Mason+, 2000)
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The ROSAT International X-ray/Optical Survey (RIXOS): source catalogue
    Mason K.O., Carrera F.J., Hasinger G., Andernach H.,
    Aragon-Salamanca A., Barcons X., Bower R., Brandt W.N.,
    Branduardi-Raymont G., Burgos-Martin J., Cabrera-Guerra F., Carballo R.,
    Castander F., Ellis R.S., Gonzalez-Serrano J.I., Martinez-Gonzalez E.,
    Martin-Mirones J.M., McMahon R.G., Mittaz J.P.D., Nicholson K.L.,
    Page M.J., Perez-Fournon I., Puchnarewicz E.M., Romero-Colmenero E.,
    Schwope A.D., Vila B., Watson M.G., Wonnacott D.
  <Mon. Not. R. Astron. Soc. 311, 456 (2000)>
  =2000MNRAS.311..456M
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ADC_Keywords: X-ray sources ; Surveys

Mission_Name: ROSAT

Keywords: surveys - stars: late-type - galaxies: active -
          galaxies: clusters: general - quasars: general - X-rays: general

Description:
    We describe the ROSAT International X-ray/Optical Survey
    (RIXOS), a medium-sensitivity survey and optical identification
    of X-ray sources discovered in ROSAT high Galactic latitude
    fields (|b|>280) and observed with the Position Sensitive Proportional
    Counter (PSPC) detector. We presents a catalogue of the RIXOS sources
    and their optical identifications.

File Summary:

FileName Lrecl Records Explanations
× 80 . This file × ReadMe 80 . This file × rixos.dat 188 404 RIXOS Source Catalogue (table2 of paper) × table1.dat 86 82 ROSAT fields used in the RIXOS survey × table3.dat 54 58 Catalogue of identifications of RIXOS sources
Byte-by-byte Description of file: rixos.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [RXJ] 4- 18 A15 --- RXJ Source designation, derived from the J2000 coordinates of the X-ray centroid 20- 22 I3 arcsec r90 ? X-ray 90% confidence positional radius 24- 25 I2 h RAh Right ascension (J2000) (1) 27- 28 I2 min RAm Right ascension (J2000) (1) 30- 34 F5.2 s RAs Right ascension (J2000) (1) 36 A1 --- DE- Declination sign (J2000) (1) 37- 38 I2 deg DEd Declination (J2000) (1) 40- 41 I2 arcmin DEm Declination (J2000) (1) 43- 46 F4.1 arcsec DEs Declination (J2000) (1) 48- 52 F5.1 10-17W/m2 SX ? X-ray flux (0.5-2.0 keV) derived from the measured count rate assuming a spectral slope of {alpha}=-1. (2) 54- 58 F5.1 10-17W/m2 SX2 ? X-ray flux (0.5-2.0 keV) derived from the best fit spectral slope and (with the exception of stellar IDs) after correcting for Galactic absorption 60- 64 F5.1 ct/ks XCR ? X-ray count rate per 1000s. 66- 68 F3.1 ct/ks e_XCR ? rms uncertainty on XCR 70- 73 I4 ct MLC ? Tolal X-ray counts based on maximum likelihood fits 75- 78 F4.1 --- SI ? X-ray spectral index (3) 80- 82 F3.1 --- e_SI ? rms uncertainty on SI 84 A1 --- n_Mag Magnitude considered (4) 85- 89 F5.2 mag Mag ? Magnitude of the optical counterpart (or the brightest galaxy for clusters) 91- 95 F5.1 --- SIopt ? Slope of the optical continuum (5) 97 A1 --- u_ID uncertainty flag on ID 99-106 A8 --- ID Category of optical ID (6) 107-114 A8 --- Type ID subtype. 118 A1 --- u_z Uncertainty flag on z 120-124 F5.3 --- z ? Redshift of extragalactic counterparts 126-172 A47 --- EmLines Emission lines observed in AGN and ELG IDs 174-175 I2 1000km/s FWHM ? FWHM of the emission line followed by "*", rounded down to the nearest integer (7) 176 A1 --- u_FWHM rms uncertainty on FWHM 178-180 A3 --- Note [NIC ] Note (8) 182-188 A7 --- RIXOS RIXOS Field (ID) and Source ID (SID) for cross reference to other RIXOS papers
Note (1): J2000 coordinates of the optical counterpart if it is a single object. For clusters and unidentified sources the X-ray centroid is given. Note (2): Flux used to define membership in the catalogue. Note (3): X-ray spectral index defined such that FX{prop.to}E{alpha}X_^ and derived by fitting three colour X-ray data assuming Galactic absorption (except for stellar IDs). See Mittaz et al. (1999MNRAS.308..233M) for details. Note (4): the origin of the magnitude is: C - from other catalogues (see Table 3); E - from APM measurements of POSS-E plates; O - from APM measurements of POSS-O plates; R - from R-band CCD images; V - from V-band CCD images; S - slit magnitudes derived by folding the spectrum through and R-band response. The typical accuracy of the slit magnitudes is about 30% (see Puchnarewicz et al., 1996MNRAS.281.1243P). Note (5): Uncertainties in the slope are about 50% and dominated by systematic effects. See Puchnarewicz et al. (1996MNRAS.281.1243P). Note (6): The number in parenthesis following the category "Clus" indicates the number of cluster galaxies whose redshifts have been measured. Note (7): Preference is given to the H{beta} or MgII lines when they are available and well defined. Otherwise the best defined permitted line in the spectrum is used. More complete details of emission line measurements are given in Puchnarewicz et al (1997MNRAS.291..177P). Note (8): Signifies that there is a catalogue cross-reference in table 3 (C), an additional note in section 3.2 (N), or that there is a CCD image of the field in Fig. 4 (I).
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1 A1 --- n_RIXOS [*] *: RIXOS3 sample 3- 5 I3 --- RIXOS RIXOS field ID 7- 13 A7 --- ROR ROSAT observation request number 15- 19 F5.2 10+20cm-2 NH Galactic absorbing column in the direction of the field centre derived from Stark et al. (1992ApJS...79...77S) in 1020atoms/cm2 21- 25 I5 s ExpTime Total ROSAT exposure time used for the detection 27- 31 I5 s SpeTime ? ROSAT exposure time used for the spectral analysis 32 A1 --- Note [abc] Note about the original data (1) 34- 35 I2 h RAh Field center right ascension (J2000) 37- 38 I2 min RAm Field center right ascension (J2000) 40- 41 I2 s RAs [0/60] Field center right ascension (J2000) 43 A1 --- DE- Field center declination sign (J2000) 44- 45 I2 deg DEd Field center declination (J2000) 47- 48 I2 arcmin DEm Field center declination (J2000) 50- 51 I2 arcsec DEs [0/60] Field center declination (J2000) 53- 56 F4.2 arcmin Rad Excluded radius around the target 58- 59 I2 --- Ntot Total number of RIXOS sources in the field 61- 62 I2 --- Nid Number of secure identifications in field 64 I1 --- Np Number of probable identifications 66- 86 A21 --- Target Name of the ROSAT target
Note (1): the following symbols are used: a = No ROSAT public data available at the time of the spectral analysis b = Detection image coadded from several individual images. The ROR number given correspond to the single longest exposure, that was also used for the spectral analysis. c = No spectral analysis performed because no sources were detected in this field above the survey flux limit
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [RXJ] 4- 18 A15 --- RXJ RIXOS source name 20- 54 A35 --- Names Identification in other catalogues
Acknowledgements: Francisco J. Carrera fjc@mssl.ucl.ac.uk History: * 07-Feb-2000: Original version (communicated by Francisco J. Carrera) In this version, the source RXJ111809.9+212554 (RIXOS 123_84) was inadvertently omitted at CDS * 22-Nov-2013: the missing source RIXOS 123_84 was added. ================================================================================ (End) Patricia Bauer [CDS] 07-Feb-2000