J/MNRAS/274/1165 The 2RE Source Catalogue (Pye+ 1995)
The ROSAT Wide Field Camera all-sky survey of extreme-ultraviolet sources -
II. The 2RE Source Catalogue
Pye J.P., McGale P.A., Allan D.J., Barber C.R., Bertram D., Denby M.,
Page C.G., Ricketts M.J., Stewart B.C., West R.G.
<Mon. Not. R. Astron. Soc. 274, 1165 (1995)>
=1995MNRAS.274.1165P 1995MNRAS.274.1165P (SIMBAD/NED BibCode)
ADC_Keywords: X-ray sources ; Extreme UV sources
Mission_Name: ROSAT
Keywords: space vehicles - catalogues - stars: late-type - white dwarfs -
ultraviolet: general - X-rays: general.
Description (Abstract):
During 1990-1991 the Wide Field Camera (WFC) on the ROSAT satellite
performed the first all-sky survey at EUV wavelengths. The survey was
conducted in two 'colours' using broad-band filters to define
wavebands covering the ranges 60-140A and 112-200A. It was fully
imaging, with effective spatial resolution of about 3arcmin FWHM, and
point source location accuracy of typically better than 1 arcmin. From
an initial analysis, Pounds et al. published the WFC Bright Source
Catalogue (BSC) of 383 sources. In this paper we report results from
reprocessing of the complete survey database; the resulting list of
sources is the '2RE' Catalogue. It contains 479 sources, of which 387
are detected in both survey wavebands, a significant advance on the BSC
(80 per cent versus 60 per cent). Improvements over the original BSC
include: (i) better rejection of poor aspect periods, and smaller
random errors in the aspect reconstruction; (ii) improved background
screening; (iii) improved methods for source detection; (iv) inclusion
of a time-variability test for each source; (v) more extensive
investigation of the survey sensitivity. We define the catalogue
selection criteria, and present the catalogue contents in terms of
tables and sky maps. We also discuss the sky coverage, source
number-flux relations, optical identifications and source variability.
See also:
ftp://ledas-ftp.star.le.ac.uk/rosat/2re/cat : the original file
J/MNRAS/260/77 : the ROSAT-WFC Bright Source Catalogue (Pounds et al. 1993)
J/A+AS/114/465 : the ROSAT XUV Pointed Phase Source Catalog
(Kreysing et al. 1995)
II/203 : Second Extreme Ultra-Violet Explorer Catalog (1996)
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges et al. 1996)
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 195 479 The 2RE catalogue, Table 2 of paper
catalog.ps 72 2461 The 2RE catalog, PostScript version
notes.txt 80 323 Notes on individual 2RE sources
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- 2RE designation, based on the J2000 position.
14 A1 --- note [*] indicates a note in file notes.txt
16- 17 I2 h RAh Right Ascension J2000 (hours)
19- 20 I2 min RAm Right Ascension J2000 (minutes)
22- 26 F5.2 s RAs Right Ascension J2000 (seconds)
29 A1 --- DE- Declination J2000 (sign)
30- 31 I2 deg DEd Declination J2000 (degrees)
33- 34 I2 arcmin DEm Declination J2000 (minutes)
36- 39 F4.1 arcsec DEs Declination J2000 (seconds)
41- 45 F5.1 arcsec ErrPos Position error, 90% confidence radius,
due to counting statistics only.
47- 52 F6.3 ct/s S1 S1-band count rate (1)
55- 59 F5.3 ct/s e_S1 1 sigma error on S1-band count rate
61- 66 F6.3 ct/s S2 S2-band count rate (1)
69- 73 F5.3 ct/s e_S2 1 sigma error on S2-band count rate
76- 80 F5.1 --- Sig1 S1-band detection significance (2)
83- 87 F5.1 --- Sig2 S2-band detection significance (2)
90- 94 F5.1 --- Sigc Combined detection significance (2)
96 I1 --- Detflag [0/3] Detection flag (3)
97 I1 --- u_Detflag [0/1] 1 indicates uncertainty (:) on Detflag
99 I1 --- VarFlag [0/2] Variability flag (4)
100-102 A3 --- EUV [EXW ] Previous reports as EUVE/X-ray source (5)
104-119 A16 --- OptName1 Name of possible optical counterpart.
124-139 A16 --- OptName2 Alternative name of possible optical counterpart
144-159 A16 --- SpType Type of counterpart
161-164 F4.1 mag Vmag Apparent magnitude of counterpart
166-170 F5.1 arcsec Dist 2RE-optical position difference
172-178 A7 --- r_OptName1 Originating catalogue for counterpart (6)
179-182 A4 --- q_OptName1 Quality of counterpart identification (7)
184-185 A2 --- n_OptName1 Notes about the possible counterpart (8)
192-195 I4 --- OClass BROWSE database object class (4 digits).
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Note (1): The bands are
S1 = 90-206eV ( 60-140 Angstroems), mean 125eV (100A)
S2 = 62-110eV (110-200 Angstroems), mean 90eV (140A)
Note (2): see section 3.5 of the paper for an accurate definition of
the acceptance thresholds. The combined detection significance
is sqrt( sig1**2 + sig2**2 ).
Note (3): see section 3.4 of the paper.
1 = detection by PSS = Point Source Search program
2 = detection by SESAME = Survey Event Source Analysis by
Maximum-likelihood fitting
3 = detection by PSS and SESAME
Note (4): see section 3.7 of the paper; the variability flag takes the values
0 = no variability claimed;
1 = significant variability;
2 = highly variable.
Note (5):
E = EUVE 1st Catalogue (Bowyer et al. 1994, Cat. J/ApJS/93/569)
W = WFC-BSC (Pounds et al. 1993, Cat. J/MNRAS/260/77)
X = X-ray, EINSTEIN IPC pointed and/or slew catalogues
(Harris et al. 1990; Plummer et al. 1991, CD-ROMs)
Note (6): Extensive use was made of the SIMBAD data-base. The catalogues
used are:
CVR = List of cataclysmic variables compiled by the UK ROSAT CV
special interest group in 1990
MCK = McCook & Sion (1987) catalogue of spectroscopically identified
white dwarf stars (Cat. III/129)
SUB = Kilkenny, Heber & Drilling (1988, S. Afr. Astron. Obs. Circ. No 12, 1)
catalogue of hot subdwarf stars.
PUL = Lyne pulsar catalogue (e.g. Lyne et al. 1988) (Cat. VII/156)
STR = Strassmeier et al. (1988) catalogue of chromospherically active
binary stars (Cat. V/71).
CNS = Gliese & Jahreiss (1991) catalogue of nearby stars,
3rd edition, preliminary version (Cat. V/70).
GCV = General catalogue of variable stars, 4th edition (Kholopov et al. 1988,
Cat. II/139)
YAL = Bright star catalogue, 5th revised edition, preliminary version
(Hoffleit & Warren 1991, Cat. V/50).
LHS = Luyten (1976) catalogue of stars with proper motions>0.5arcsec/yr
(Cat. I/87)
VER = Veron-Cetty & Veron (1989) catalogue of quasars and active galactic
nuclei (Cat. VII/146).
CAT = Soifer et al. (1984, ApJ 278, L271) catalogue of galaxies, a merger
of various galaxy catalogues.
MLN = Master hst of non-stellar objects (Dixon & Sonneborn 1980, Cat. VII/2).
SIM = Compact version of SIMBAD database.
MK = Buscombe (1992, "General Catalogue of MK spectral classifications,
volumes 7-10, Northwestern University, Evanston Illinois")
HIC = Hipparcos input catalogue of stars (Turon et al. 1992, Cat. I/196)
GSC = HST guide star catalogue (from CD-ROM version 1.1), Cat. I/220.
W = ROSAT-WFC Bright Source Catalogue (Pounds et al. 1993,
Cat. J/MNRAS/260/77)
E = First EUVE source catalogue (Bowyer et al. 1994, Cat. J/ApJS/93/569).
X = Einstein IPC point source catalogues, from pointed and slew data
(Harris et al. 1990; Plummer et al. 1991; CD-ROMs).
Note (7): If this field is blank then any listed possible counterpart
is simply based on positional coincidence, and care should be taken
in using any such information.
IDP+ = positive identification, either new, or confirming a catalogued
object as the counterpart, resulting from the IDP
(Mason et al. 1995, MNRAS 274, 1194)
ID** = positive identification, based on the properties of the object,
either from the existing literature or from follow-up
observations other than the IDP, e.g.
RS CVn system, or DA white dwarf
ID* = probable identification, e.g. poorly studied dMe star
Note (8): the following symbols are used:
RS = (RS CVn-type) (chromospherically/coronally active binaries)
BY = (BY Dra-type) (chromospherically/coronally active binaries)
W = (W UMa-type) contact binaries
A = indicates other active stars
Historical Notes:
* 20-Jul-1995: The catalogue was copied in July 1995 via anonymous ftp
at: ledas-ftp.star.le.ac.uk
and the catalogue file originally named 2re_table.txt
was documented according to the CDS Documentation Standards.
The notes were converted from the full-paper postscript file (2re_text.ps)
* 21-Jan-1998: the flag "note" in byte 14 indicating the existence of
a note was added at CDS.
(End) Francois Ochsenbein [CDS] 21-Jan-1998