J/AJ/133/2495 Classification of RASS optical counterparts (Dragomir+, 2007)
Spectral classification of optical counterparts to ROSAT All-Sky Survey
X-ray sources.
Dragomir D., Roy P., Rutledge R.E.
<Astron. J., 133, 2495-2501 (2007)>
=2007AJ....133.2495D 2007AJ....133.2495D
ADC_Keywords: X-ray sources ; Magnitudes, photographic
Keywords: stars: general - surveys - X-rays: galaxies - X-rays: general
X-rays: stars
Abstract:
Previous work (Rutledge et al., 2000ApJS..131..335R 2000ApJS..131..335R) statistically
identified 5492 optical counterparts, with ≳90% confidence, from
among the ∼18000 X-ray sources appearing in the ROSAT All-Sky Survey
Bright Source Catalog (RASS BSC; Voges et al. 1999, Cat. IX/10).
Using low-resolution spectra in the wavelength range 3700-7900Å, we
present spectroscopic classifications for 195 of these counterparts
which have not previously been classified. Of these 195, we find 168
individual stars of F, G, K, or M type, 6 individual stars of unknown
type, 6 double stars, 6 AGNs or galaxies, and 7 unclassifiable
objects; the spectra of the 2 remaining objects were saturated.
Description:
The optical spectra were obtained using the Palomar 60 inch (1.5m)
echelle spectrograph (McCarthy 1988, PhD thesis), in combination with
a TI 800x800 pixel CCD.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 73 195 Table of Sources
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See also:
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
I/252 : The USNO-A2.0 Catalogue (Monet+ 1998)
J/A+AS/139/575 : RASS AGN sample (Wei+, 1999)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Source number
5- 8 A4 --- --- [1RXS]
10- 25 A16 --- 1RXS Source name (JHHMMSS.s+DDMMSS) in RASS (IX/10)
27- 31 F5.3 --- PID Probability of unique association
33- 38 F6.4 ct/s CRate RASS count rate
40- 45 F6.4 ct/s e_CRate The 1σ error in CRate
47- 50 F4.1 mag Bmag The USNO-A2 B band magnitude
52- 73 A22 --- Class Source class (1)
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Note (1): The notes include the symbols:
* = star;
** = double;
+ = coronally active.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-May-2009