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IX/32 ROSAT Bright Survey (Fischer+, 1998-2000)
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The ROSAT Bright Survey.
I. Identification of an AGN sample with hard ROSAT X-ray spectra
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. Nachr. 319, 347 (1998)>
=1998AN....319..347F
The ROSAT Bright Survey.
II. Catalogue of all high-galactic latitude RASS sources with PSPC
countrate CR>0.2s^-^1
Schwope A., Hasinger G., Lehmann I., Schwarz R., Brunner H.,
Neizvestny S., Ugryumov A., Balega Yu., Trumper J., Voges W.
<Astron. Nachr. 321, 1 (2000)>
=2000AN....321....1S
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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{deg}
(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{deg}^2^ at a flux limit of 2.4x10^-12^erg/cm^2^/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:
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FileName Lrecl Records Explanations
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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
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See also:
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1996)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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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 (2000)
28- 29 I2 min RAm X-ray right ascension (2000)
31- 34 F4.1 s RAs X-ray right ascension (2000)
36 A1 --- DE- X-ray declination sign (2000)
37- 38 I2 deg DEd X-ray declination (2000)
40- 41 I2 arcmin DEm X-ray declination (2000)
43- 44 I2 arcsec DEs X-ray declination (2000)
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
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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).
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- RHS RHS number
5- 6 I2 h RAh Optical right ascension (2000)
8- 9 I2 min RAm Optical right ascension (2000)
11- 14 F4.1 s RAs Optical right ascension (2000)
16 A1 --- DE- Optical declination sign (2000)
17- 18 I2 deg DEd Optical declination (2000)
20- 21 I2 arcmin DEm Optical declination (2000)
23- 24 I2 arcsec DEs Optical declination (2000)
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
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Byte-by-byte Description of file: note3.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Note Note designation in table3.dat
3 A1 --- --- [:]
5- 84 A80 --- Text Text of note
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Byte-by-byte Description of file: rosat.dat
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Bytes Format Units Label Explanations
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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 (1{sigma}) as
given in the 1RXS-catalog. The 90% confidence
error radius is r_90_=1.65{sigma}
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
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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
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- RBS RBS number
6- 80 A75 --- Note Text of the note
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Acknowledgements: A. Schowpe <aschwope@aip.de>
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(End) James Marcout, Patricia Bauer [CDS] 22-Jan-2002