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J/MNRAS/274/1194 Optical Identifications of ROSAT EUV Sources (Mason+ 1995)
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Optical identification of EUV sources from the ROSAT Wide Field
Camera all-sky survey.
Mason K.O., Hassall B.J.M., Bromage G.E., Buckley D.A.H., Naylor T.,
O'Donoghue D., Watson M.G., Bertram D., Branduardi-Raymont G.,
Charles P.A., Cooke B., Elliott K.H., Hawkins M.R.S., Hodgkin S.T.,
Jewell S.J., Jomaron C.M., Sekiguchi K., Kellett B.J., Lawrence A.,
McHardy I., Mittaz J.P.D., Pike C.D., Ponman T.J., Schmitt J.,
Voges W., Wargau W., Wonnacott D.
<Mon. Not. R. Astron. Soc. 274, 1194 (1995)>
=1995MNRAS.274.1194M (SIMBAD/NED BibCode)
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ADC_Keywords: X-ray sources
Keywords: catalogues - star: activity - binaries: general -
novae, cataclysmic variables - white dwarfs - galaxies: active
Mission_Name: ROSAT
Description:
Optical identifications for 195 EUV sources located in the ROSAT Wide
Field Camera all-Sky survey are presented. We list 69 previous unknown
EUV-emitting white dwarfs, 114 active stars, 7 new magnetic
cataclysmic variables and 5 active galaxies. Several of the white
dwarfs have resolved M-type companions, while five are unresolved
white dwarf/M-star pairs. Finding charts are given for the optical
counterparts.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
appena 80 165 Notes on identified sources
appenb 80 86 Notes on failed identifications
table1 165 209 WFC optical identification programme ID summary
table1.tex 110 1013 TeX version of table1
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See also:
J/MNRAS/260/77 : ROSAT Wide Field Camera EUV Bright Sources (Pounds+ 1993)
J/MNRAS/274/1165 : The 2RE Source Catalogue (Pye+ 1995)
Byte-by-byte Description of file: table1
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Bytes Format Units Label Explanations
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1- 18 A18 --- Name Source name
20 A1 --- l_S1 Limit flag on S1
21- 26 F6.1 10-3ct/s S1 ? WFC survey filter S1 (60-140A) counts
28 A1 --- l_S2 Limit flag on S2
29- 34 F6.1 10-3ct/s S2 ? WFC survey filter S2 (110-200A) counts
36- 40 F5.1 --- NH ? Hydrogen column density
42- 43 I2 h RAh Right ascension J2000
45- 46 I2 min RAm Right ascension J2000
48- 52 F5.2 s RAs Right ascension J2000
55 A1 --- DE- Declination sign
56- 57 I2 deg DEd Declination J2000
59- 60 I2 arcmin DEm Declination J2000
62- 65 F4.1 arcsec DEs Declination J2000
66 A1 --- n_DE [g:] A 'g' indicates that the data are from
the Hubble Space Telescope Guide Star Catalog
69- 73 F5.2 mag Vmag ? V magnitude of the optical counterpart
74 A1 --- n_Vmag2 [-] '-' when interval
75- 76 I2 mag Vmag2 ? Upper limit of Vmag when n_Vmag2='-'
77 A1 --- u_Vmag Uncertainty flag on Vmag
78- 82 A5 --- n_Vmag Note on Vmag (1)
85- 88 F4.1 mag B-V ? B-V color index of the optical counterpart
90- 97 A8 --- SpType Spectral type of the optical counterpart
100 A1 --- l_alpha Limit flag on alpha
101-105 F5.2 --- alpha ? Source apparent EUV to optical flux ratio
108-111 A4 --- Class Identification class (2)
113-118 F6.2 0.1nm EWCa ? Equivalent width of the Ca H 3933A
chromospheric emission line (for stars only)
119 A1 --- n_EWCa [u-] Note on EWCa (3)
120 A1 --- --- [/] Separator
121-124 F4.1 0.1nm EWHa ? Equivalent width of the Halpha line
(for stars only)
125 A1 --- n_EWHa [?u-] Note on EWHa (3)
126-128 F3.1 10+3km/s FWHb ? Full width at half maximum of the Hbeta line
129 A1 --- --- [/] Separator
130-133 F4.1 0.1nm EWHb ? Equivalent width of the Hbeta line
134 A1 --- u_EWHb Uncertainty flag on EWHb
136 A1 --- X [y] y: there is an X-ray telescope position
available for the source
137 A1 --- Note [+] +: additional information in appena file
139-168 A30 --- Com Comments
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Note (1): P: CCD or photoelectric photometry (Buckley, private communication;
Schwartz et al. 1995)
G: The HST Guide Star Catalog (v.1.1)
cat: catalogued magnitudes (see Pye et al., 1995)
E: POSS E digitized plate material
J: SERC J digitized plate material
S: uncorrected slit magnitudes taken from calibrated spectra
A 'c' appended to the J and E codes indicates that accurate external
zero-points were not been obtained by comparing the magnitudes of
stars within 3arcmin of the EUV source that appear in the HST Guide
Star Catalog (v.1.1) with the uncorrected values measured for those
stars from the Schmidt-telescope Sky Survey Plates. If there is
more than one counterpart, there are separate entries for each
star when these are available.
Note (2): Star: all active stars
WD: white dwarf
CV: cataclysmic variable
AGN: active galaxy
Note (3): u: the line was covered but no measurable emission component was
detected. Significant chromospheric emission may still be present,
particularly when this refers to Halpha (e.g. the Halpha
photospheric absorption line may be 'filled-in' by emission)
-: the line was not covered in the spectra
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Courtesy: K.O Mason <kom@mssl.ucl.ac.uk>
Historical note: In table1, 2RE J033711+255926 was identified to HD 224030
instead of HD 22403. Correction made on 13-Feb-1998.
References:
Pye J.P. et al., =1995MNRAS.274.1165P
Schwartz R.D. et al. =1995PASP..107..667S
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(End) Patricia Bauer [CDS] 23-Aug-1996