J/A+AS/132/341 ROSAT GPS optical identification (Motch+ 1998)
Identification of selected sources for the ROSAT Galactic Plane Survey. I.
Motch C., Guillout P., Haberl F., Krautter J., Pakull M.W., Pietsh W.,
Reinsch K., Voges W., Zickgraf F.-J.
<Astron. Astrophys. Suppl. Ser. 132, 341 (1998)>
=1998A&AS..132..341M 1998A&AS..132..341M (SIMBAD/NED BibCode)
ADC_Keywords: X-ray sources ; Cross identifications
Mission_Name: ROSAT
Keywords: X-ray: general - X-ray: stars - X-rays: galaxies - surveys
Abstract:
We report on optical searches in the error circles of 93 ROSAT survey
sources located at low galactic latitudes (|b|<20°). These sources
were extracted from the ROSAT Galactic Plane Survey using various
selection criteria on hardness ratio, X-ray and optical brightness and
integrated galactic absorption in the direction of the source. We find
optical identifications in 76 cases, among which are 25 new AGN, 6 new
CVs and a new Be/X-ray binary. In order to illustrate the relevance of
the source selections applied here, we cross-correlated the ROSAT
all-sky survey bright source list with SIMBAD. Different classes of
X-ray emitters populate distinct regions of a multi dimensional
parameter space involving flux ratios, galactic latitude and NH.
This relatively good segregation offers the possibility to build
source samples with enhanced probability of identification with a
given class. Complete optical identification of such subsamples could
eventually be used to compute meaningful probabilities of
identification for all sources using as basis a restricted set of
multi-wavelength information.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 99 93 X-ray characteristics of ROSAT survey sources
derived from the SASS as in October 1991
table5.dat 96 93 Optical identifications of ROSAT survey sources
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See also:
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1996)
J/A+A/318/111 : ROSAT Galactic Plane Survey (Motch+ 1997)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- RXJ Source name
17 A1 --- Source [XAOBS] Source selection origin (1)
19- 20 I2 h RAh Right ascension (J2000.0)
22- 23 I2 min RAm Right ascension (J2000.0)
25- 28 F4.1 s RAs Right ascension (J2000.0)
30 A1 --- DE- Declination sign
31- 32 I2 deg DEd Declination (J2000.0)
34- 35 I2 arcmin DEm Declination (J2000.0)
37- 38 I2 arcsec DEs Declination (J2000.0)
40- 43 F4.1 arcsec r90 ? 90% confidence radius
45- 49 F5.3 ct/s Count Count rate
51- 55 F5.3 ct/s e_Count rms uncertainty on Count
57- 61 F5.2 --- HR1 Hard ratio 1
63- 66 F4.2 --- e_HR1 ? rms uncertainty on HR1
68- 72 F5.2 --- HR2 Hard ratio 2
74- 77 F4.2 --- e_HR2 ? rms uncertainty on HR2
79- 99 A21 --- 1RXS 1RXS (Cat. IX/10) designation
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Note (1): X: X-ray binary like
S: Soft white dwarf candidate
A: Absorption supersoft candidate
B: X-ray bright source
O: Other remaining source
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- RXJ Source name
17 A1 --- Sel [XAOBS] Source selection origin (1)
19- 22 F4.2 --- Dist ? X-ray to optical distance in units of the
90% confidence radius
24- 25 I2 h RAh ? Right ascension (J2000.0)
27- 28 I2 min RAm ? Right ascension (J2000.0)
30- 34 F5.2 s RAs ? Right ascension (J2000.0)
36 A1 --- DE- Declination sign
37- 38 I2 deg DEd ? Declination (J2000.0)
40- 41 I2 arcmin DEm ? Declination (J2000.0)
43- 46 F4.1 arcsec DEs ? Declination (J2000.0)
48- 67 A20 --- IdOpt Optical identification
69- 73 F5.2 mag Vmag ? V magnitude
75- 79 F5.2 mag Bmag ? B magnitude
81- 84 A4 --- Class Class (2)
87- 94 A8 --- Mtype Spectral or morphological type
96 A1 --- Chart [Y] Y: a finding chart is provided
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Note (1): X: X-ray binary like
S: Soft white dwarf candidate
A: Absorption supersoft candidate
B: X-ray bright source
O: Other remaining source
Note (2): AC: active corona
Gal: Normal galaxy
AGN: Active galactic nucleus
Be/X: Be/X-ray binary
UNID: Unidentified
WD: Isolated white dwarf
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Acknowledgements: Christian Motch
(End) Patricia Bauer [CDS] 08-Oct-1998