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Detailed Description of J/A+A/335/467 : High galactic latitude RASS X-ray sources (Thomas+ 1998)
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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/A+A/335/467 High galactic latitude RASS X-ray sources (Thomas+ 1998)
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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)
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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
× 80 . This file
× 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 hcthomas@MPA-Garching.MPG.DE
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(End) Patricia Bauer [CDS] 27-Nov-1998