J/A+A/347/47 High galactic latitude RASS X-ray sources. II. (Beuermann+, 1999)
Identification of soft high galactic latitude RASS X-ray sources. II.
Sources with PSPC count rate CR<0.5cts/s.
Beuermann K., Thomas H.-C., Reinsch K., Schwope A.D., Truemper J., Voges W.
<Astron. Astrophys. 347, 47 (1999)>
=1999A&A...347...47B 1999A&A...347...47B
ADC_Keywords: X-ray sources ; Cross identifications
Keywords: stars: novae, cataclysmic variables - galaxies: actives -
galaxies: nuclei - galaxies: quasars: general - galaxies: Seyfert -
X-rays: general
Abstract:
We present a summary of spectroscopic identifications of bright soft
high galactic latitude X-ray sources from the ROSAT All-Sky Survey
with total PSPC count rates 0.11<CR<0.5cts/s and hardness ratios
HR1<0. This study supplements the identification program of a complete
sample of sources with CR≥0.5cts/s presented previously.
Spectroscopic identifications are presented for 70 of 77 sources, 5
sources are identified by other means, and subsidiary information is
given for 2 as yet unidentified sources. In practically all cases, a
unique optical counterpart exists. As for the brighter fraction of the
sample, the largest source classes are Seyfert 1 galaxies, magnetic
cataclysmic variables, and hot white dwarfs. In the Galactic Pole caps
at |b|>400, Seyfert galaxies dominate, whereas at intermediate
latitudes galactic objects as magnetic cataclysmic variables and white
dwarfs become relatively more frequent.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 95 77 Summary of optical identification program of
new bright soft high-galactic-latitude RASS
sources with HR1<0.
notes.dat 79 51 Individual notes of table3.dat
table3.tex 72 324 LaTeX version of table3
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See also:
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1996)
J/A+A/335/467 : High galactic latitude RASS X-ray sources (Thomas+ 1998)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name J2000 X-ray position from the RASS BSC
16 A1 --- n_Name [X] X when source in RASS BSC
18- 19 I2 h RAh ? Optical counterpart right ascension (J2000)
21- 22 I2 min RAm ? Optical counterpart right ascension (J2000)
24- 27 F4.1 s RAs ? Optical counterpart right ascension (J2000)
29 A1 --- DE- Optical counterpart declination (J2000)
30- 31 I2 deg DEd ? Optical counterpart (J2000)
33- 34 I2 arcmin DEm ? Optical counterpart (J2000)
36- 37 I2 arcsec DEs ? Optical counterpart (J2000)
39- 42 F4.1 arcsec Sep ? Separation between optical and X-ray positions
44- 47 F4.2 --- r90 ? Separation in units of the 90% confidence
radii according to Eq. 1
49- 53 F5.3 ct/s CR RASS BSC PSPC count rate CR
55- 56 I2 10-3ct/s e_CR rms uncertainty on CountRate
58- 62 F5.2 --- HR1 Hardness ratio HR1,
64- 65 I2 10-2 e_HR1 rms uncertainty on HR1
67- 70 A4 --- Class Classification
72- 75 A4 --- Type Type of the optical counterpart,
77- 81 F5.3 --- z ? Redshift if extragalactic
82 A1 --- u_z Uncertainty flag on z
84- 87 F4.1 mag Vmag ? Visual magnitude V.
89- 95 A7 --- Notes Notes (1)
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Note (1): Notes as follows:
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 1998A&AS..127..145B)
4 = see also Grupe et al. (1998A&A...330...25G 1998A&A...330...25G)
5 = Inferred identification from the Digitized Sky Survey
6 = Radio source
7 = Listed also by Veron-Cetty & Veron (1996, Cat. VII/188)
8 = Remarks to individual sources in notes.dat file
Correction to Paper I:
160518.5+542101: For this source, the identification of Bade et al.
(1998A&AS..127..145B 1998A&AS..127..145B) as an M-star has been cited in Paper I. That
star, however, is 31" from the X-ray position and the more likely
candidate is a 19 mag object at 5" separation which is also a radio
source (White et al. 1997, Cat. VIII/51), suggesting a BL Lac
identification. For the M-star, the implied ≃0.44 would also be quite
atypical, while the fx/fo≃1.4 is typical of a BL Lac object.
The USNO-A1.0 optical position (J2000) of the BL Lac candidate is
16:05:19.0+54:21:00, the radio position 16:05:19.1+54:21:00.
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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- 15 A15 --- Name RASS name
17- 79 A63 --- Note Text of the note
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Acknowledgements:
K. Beuermann
History:
* 20-Jul-1999: from author
* 26-Sep-2010: RASS names in notes.dat corrected to match the names of table3
(End) Francois Ochsenbein [CDS] 20-Jul-1999