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J/A+A/335/467       High galactic latitude RASS X-ray sources (Thomas+ 1998)

Identification of soft high galactic latitude RASS X-ray sources. I. A complete count-rate limited sample. Thomas H.-C., Beuermann K., Reinsch K., Schwope A.D., Truemper J., Voges W. <Astron. Astrophys. 335, 467 (1998)> =1998A&A...335..467T (SIMBAD/NED BibCode)
ADC_Keywords: X-ray sources ; Cross identifications Keywords: X-rays: galaxies - X-rays: stars - galaxies: Seyfert - novae, cataclysmic variables - white dwarfs - stars: coronae Abstract: We present a summary of spectroscopic identifications for a complete sample of bright soft high galactic latitude X-ray sources drawn from the ROSAT All-Sky Survey which have PSPC count-rates CR>0.5cts/s and hardness ratios HR1<0. Of a total of 397 sources, 270 had catalogued counterparts although most of these were not previously known as X-ray sources; of the remaining 127 sources neither X-ray nor optical properties were previously known. Of the whole sample of very soft X-ray sources 155 were also discovered by the Wide-Field-Camera on board ROSAT. We present spectroscopic identifications of 108 sources and other identifications for further 18 sources; 1 source remains unidentified so far. In practically all cases a unique optical counterpart exists facilitating identification. The largest source classes are AGN, magnetic cataclysmic variables, and hot white dwarfs. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 52 270 Summary of the optical identification program for previously known sources in our sample. table3.dat 97 127 Summary of the optical identification program for new sources in our sample. notes.dat 145 36 Individual notes
See also: IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1996) J/MNRAS/274/1165 : The 2RE Source Catalogue (Pye+ 1995) J/MNRAS/274/1194 : Optical Identifications of ROSAT EUV Sources (Mason+ 1995) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 15 A15 --- 1RXS 1RXS designation 16 A1 --- n_1RXS [*] Note on the object (1) 18- 31 A14 --- Name Name of the optical counterpart 33- 42 A10 --- SpType Spectral type of the counterpart 44- 47 F4.1 arcsec Sep Separation between optical and X-ray positions 49- 51 F3.1 --- Sep(r90) Separation between optical and X-ray positions in units of the 90% confidence radii
Note (1): 1RXS J035025.0+171455 (V471 Tau): HR1=-0.7, white dwarf companion (Werner & Rauch, 1997A&A...324L..25W and references therein) 1RXS J041521.5-073843 (40 Eri): HR1=-0.3, white dwarf companion 1RXS J132511.6-110932 (Spica): HR1=-0.9, coronal emission (Cassinelli et al., 1994ApJ...421..705C)
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 15 A15 --- 1RXS 1RXS designation 17- 18 I2 h RAh ? Optical counterpart right ascension (J2000) 20- 21 I2 min RAm ? Optical counterpart right ascension (J2000) 23- 26 F4.1 s RAs ? Optical counterpart right ascension (J2000) 28 A1 --- DE- Declination sign 29- 30 I2 deg DEd ? Optical counterpart declination (J2000) 32- 33 I2 arcmin DEm ? Optical counterpart declination (J2000) 35- 36 I2 arcsec DEs ? Optical counterpart declination (J2000) 38- 41 F4.1 arcsec Sep ? Separation between optical and X-ray positions in arcsec 43- 45 F3.1 --- Sep(r90) ? Separation between optical and X-ray positions in units of the 90% confidence radii 47- 50 F4.2 ct/s CR RASS BSC PSPC count-rate 52- 53 I2 10-2ct/s e_CR rms uncertainty on CR 55- 59 F5.2 --- HR1 Hardness ratio HR1 61- 62 I2 10-2 e_HR1 rms uncertainty on HR1 64- 68 A5 --- Class Classification of the optical counterpart 70- 76 A7 --- Type Type of the optical counterpart 78- 82 F5.3 --- z ? Redshift if extragalactic 83 A1 --- u_z Uncertainty flag on z 85- 88 F4.1 mag Vmag ? V magnitude 90- 96 A7 --- Note Notes (1)
Note (1): 1: spectroscopic identification, this work 2: WFC identification (Pye et al., 1995, Cat. J/MNRAS/274/1165, Mason et al., 1995, Cat. J/MNRAS/274/1194) 3: Hamburg/RASS identification (Bade et al., 1998A&AS..127..145B) 4: Grupe et al., 1998A&A...330...25G 5: inferred identification from the Digitized Sky Survey (see Sect. 3.2) 6: radio source (see Sect. 3.2) 7: blank field 8: Remarks to individual sources in notes.dat file
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 16 A16 --- 1RXS 1RXS designation 18-145 A128 --- Note Text of the note
Acknowledgements: Hans-Christoph Thomas
(End) Patricia Bauer [CDS] 27-Nov-1998
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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