Access to Astronomical Catalogues

← Click to display the menu
IX/32                  ROSAT Bright Survey                 (Fischer+, 1998-2000)

The ROSAT Bright Survey. I. Identification of an AGN sample with hard ROSAT X-ray spectra II. Catalogue of all high-galactic latitude RASS sources with PSPC countrate CR>0.2s-1. Fischer J.-U., Hasinger G., Schwope A.D., Brunner H., Boller T., Trumper J., Voges W., Neizvestny S., Schwarz R., Ugryumov A., Belage Yu. <Astron. Nachrichten 319, 347 (1998); 321, 1 (2000)> =1998AN....319..347F =2000AN....321....1S
ADC_Keywords: Surveys ; X-ray sources ; Active gal. nuclei Mission_Name: ROSAT Keywords: AGN - interacting galaxies - surveys: X-rays - surveys: AGN Description: The ROSAT Bright Survey (RBS, table "rosat.dat") aims to completely optically identify the 2072 brightest sources detected in the ROSAT all-sky survey (Cat. IX/10) at galactic latitudes |b|>30° (excluding LMC, SMC, Virgo cluster), with countrate above 0.2s-1; this program is 99.5% complete, and a sub-sample of 931 sources with countrate above 0.2s-1 in the hard spectral band between 0.5 and 2.0keV is 100% identified. The total survey area comprises 20391°2 at a flux limit of 2.4x10-12erg/cm2/s in the 0.5-2.0keV band. Tables 1 and 3 examine the "RHS" sub-sample of 66 bright point-like ROSAT survey sources with almost hard PSPC spectra (hardness ratio HR1>0.5) which could be nearly completely identified by low-resolution optical spectroscopy with the following breakdown into object classes: 31 Seyfert galaxies (20 Sy1), 22 BL Lac candidates, 5 clusters of galaxies, 1 cataclysmic variable, and 5 bright stars. Only one object remained unidentified and one X-ray source was a spurious detection. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 70 65 List of X-ray sources forming the ROSAT Hard Survey, RHS table3.dat 75 64 Summary of the optical identification program of the new sources in the RHS-sample. note3.dat 84 33 Notes from table3.dat rosat.dat 151 2072 The ROSAT Bright Survey (RBS) catalogue notes.dat 80 283 Individual notes of rosat.dat file
See also: IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1996) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 2 I2 --- RHS ROSAT Hard Survey sequential number 4- 7 I4 --- RBS ? ROSAT Bright Survey sequential number 9- 23 A15 --- 1RXSJ 1RXSJ (Cat. IX/10) designation 25- 26 I2 h RAh X-ray right ascension (J2000) 28- 29 I2 min RAm X-ray right ascension (J2000) 31- 34 F4.1 s RAs X-ray right ascension (J2000) 36 A1 --- DE- X-ray declination sign (J2000) 37- 38 I2 deg DEd X-ray declination (J2000) 40- 41 I2 arcmin DEm X-ray declination (J2000) 43- 44 I2 arcsec DEs X-ray declination (J2000) 46 A1 --- D [PH] Detector (P: PSPC, H: HRI) 48- 49 I2 arcsec e_Pos X-ray positional uncertainty 51- 54 F4.2 ct/s CRate Count rate (1) 56- 59 F4.2 ct/s e_CRate rms uncertainty on CRate 61- 65 F5.2 --- HR1 Hardness ratio 1 (1) 67- 70 F4.2 --- e_HR1 rms uncertainty on HR1
Note (1): X-ray count rates and hardness ratios are derived from the All-Sky Survey Bright Source Catalogue (1RXS, Voges et al., 1996, Cat. <IX/10), with the exception of RHS10, where the SASS1-processed survey data are used. HR1=(H+S)/(H-S) with the ROSAT-PSC count rates H in the hard band (0.5-2.0keV) and S in the soft band (0.1-0.4keV).
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 2 I2 --- RHS RHS number 5- 6 I2 h RAh Optical right ascension (J2000) 8- 9 I2 min RAm Optical right ascension (J2000) 11- 14 F4.1 s RAs Optical right ascension (J2000) 16 A1 --- DE- Optical declination sign (J2000) 17- 18 I2 deg DEd Optical declination (J2000) 20- 21 I2 arcmin DEm Optical declination (J2000) 23- 24 I2 arcsec DEs Optical declination (J2000) 27- 28 I2 arcsec Dox Positional difference between the optical and X-ray coordinates 32- 35 A4 --- Class Classification of the object 38- 46 A9 --- Type Type of the object 48- 52 F5.3 --- z ? Redshift 55- 58 F4.1 mag Vmag Optical brightness 60- 63 F4.1 10-15W/m2 FX Integrated X-ray flux between 0.5 and 2.0keV 65- 70 F6.1 mJy Fr ? Radio flux at 1.4GHz 72- 75 A4 --- Notes Notes detailed in note3.dat
Byte-by-byte Description of file: note3.dat
Bytes Format Units Label Explanations
1- 2 A2 --- Note Note designation in table3.dat 3 A1 --- --- [:] 5- 84 A80 --- Text Text of note
Byte-by-byte Description of file: rosat.dat
Bytes Format Units Label Explanations
1- 4 I4 --- RBS ROSAT Bright Survey number 6- 20 A15 --- 1RXSJ 1RXSJ X-ray coordinates (Cat. IX/10) 22- 23 I2 h RAh ? Optical right ascension (J2000) 25- 26 I2 min RAm ? Optical right ascension (J2000) 28- 31 F4.1 s RAs ? Optical right ascension (J2000) 33 A1 --- DE- Optical declination sign (J2000) 34- 35 I2 deg DEd ? Optical declination (J2000) 37- 38 I2 arcmin DEm ? Optical declination (J2000) 40- 41 I2 arcsec DEs ? Optical declination (J2000) 43- 45 I3 arcsec Dist ? Distance optical minus X positions 48- 50 I3 arcsec e_Pos X-ray positional uncertainty (1σ) as given in the 1RXS-catalog. The 90% confidence error radius is r90=1.65σ 52- 56 F5.2 ct/s CR RASS countrate in the total ROSAT window 0.1-2.4keV 58- 62 F5.2 ct/s CRH RASS countrate in the hard ROSAT window 0.5-2.0keV 64- 68 F5.2 --- HR1 hardness ratio (1) 70- 74 F5.2 --- HR2 hardness ratio (1) 76- 80 F5.2 10+20cm-2 NH Galactic hydrogen column density 82- 91 A10 --- Name (Truncated) Name in optical catalogues 93- 97 A5 ---- XClass Class of X-ray source (2) 99-108 A10 --- Type Type within class (2) 110-115 F6.4 --- z ? redshift 116 A1 --- u_z Uncertainy flag on z 118 A1 --- l_Mag Limit flag on Mag 119-122 F4.1 mag Mag ? Optical brightness (typically in the V-band, sometimes only through spectrograph slit 123 A1 --- u_Mag Uncertainty flag on Mag 124 A1 --- n_Mag [CSNBDRE] Band and origin of magnitude (3) 126-130 I5 10-17W/m2 FX Flux in ROSAT X-ray band 131-136 F6.2 --- logFX/Fo ? log flux ratio X-ray to optical 137-141 F5.1 10-7W logLX ? log of X-ray luminosity 143 A1 --- Note [Y] Y: Note detailed in notes.dat file
Note (1): Hardness ratio: HR1=(H+S)/(H-S) with H and S being the counts in the hard (0.5-2.0keV) and the soft (0.1-0.4keV) spectral bands, respectively. HR2=(D-C)/(D+C) with D and C being the count in the (0.9-2.0keV) and the (0.5-0.9keV) spectral bands, respectively. Note (2): A column indicates an uncertain identification. AGN: active galactic nucleus, X-rays originate from the central engine GALAX: normal galaxy without obvious nuclear activity. X-rays originate predominantly from the stellar constituents of the galaxy CLUST: cluster of galaxies GGRP: small (compact) group of galaxies STAR: coronal or photospheric emitter of X-rays CV: cataclysmic variable or related object (white dwarf accretor) XRB: X-ray binary (neutron star or black hole accretor) MC: Magellanic cloud source, not considered in the identification program VIRGO: X-ray source in the Virgo region, not considered in the identification program Note (3): Origin of magnitude: C: CDS/SIMBAD (V band) D: CDS/SIMBAD (D band) N: NED (a magnitude in the optical range) R: APM/ROE scan of POSS/ESO/SERC red (E) plate B: APM/ROE scan of POSS/ESO/SERC blue (O) plate S: below slit magnitude determined by folding a low-resolution spectrum with the sensitivity curve of a V-filter E: not specified
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 4 I4 --- RBS RBS number 6- 80 A75 --- Note Text of the note
Acknowledgements: A. Schowpe
(End) James Marcout, Patricia Bauer [CDS] 22-Jan-2002
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

catalogue service