ACDS V10.0 - Fri Sep 01 09:08:03 CEST 2023
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Detailed Description of IX/10A :
ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
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Note : this is the description file of the original catalog.
This HTML page corresponds well to the original description, but some minor
changes in the format may have been introduced in the FITS output
files in order to allow for arithmetic operations on quantities
such as coordinates and times. h:m:s and d:m:s units are normally
converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the
units; the value given in the HTML files supersedes the value indicated in the ReadMe
file for this catalogue.
IX/10A ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
================================================================================
The ROSAT all-sky survey bright source catalogue.
Voges W., Aschenbach B., Boller T., Braeuninger H., Briel U., Burkert W.,
Dennerl K., Englhauser J., Gruber R., Haberl F., Hartner G., Hasinger G.,
Kuerster M., Pfeffermann E., Pietsch W., Predehl P., Rosso C.,
Schmitt J.H.M.M., Truemper J., Zimmermann H.U.
<Astron. Astrophys. 349, 389 (1999)>
=1999A&A...349..389V
================================================================================
ADC_Keywords: X-ray sources
Mission_Name: ROSAT
Keywords: catalogs - surveys - X-rays: general
Description:
The ROSAT All-Sky Survey Bright Source Catalogue (RASS-BSC, revision
1RXS) is derived from the all-sky survey performed during the first
half year (1990/91) of the ROSAT mission. 18,806 sources are
catalogued (five sources were removed compared to the 18,811 sources
of the 1996 version), down to a limiting ROSAT PSPC count-rate of
0.05cts/s in the 0.1-2.4keV energy band, with a detection likelihood
of at least 15 and with at least 15 source photons. For 94% of the
sources visual inspection confirmed the results of the standard
processing with respect to existence and position; the remaining 6%
were re-analysed and appropriately flagged. At a brightness limit of
0.1cts/s (8,547 sources) the catalogue represents a sky coverage of
92%. Broad band images are available for a subset of the flagged
sources from http://www.rosat.mpe-garching.mpg.de/survey/rass-bsc .
Questions or comments may be directed to
<xray-info(at)mpe.mpg.de>
File Summary:
FileName Lrecl Records Explanations
× 80 . This file
× ReadMe 80 . This file
× 1rxs.dat 185 18806 The 1RXS catalogue
× 1rxs_cor.dat 225 18806 1RXS Correlation entries
× cor_iras.dat 178 7972 1RXS Correlation to IRASPSC, IRASFSC
× cor_ned.dat 196 38670 1RXS Correlation to NED
× cor_nvs.dat 139 31674 1RXS Correlation to NVSS, FIRST
× cor_pri.dat 214 54935 1RXS Correlation to PRI, RITTER, SIMBAD, TYCHO,
EUVE
× cor_hst.dat 214 26210 1RXS Correlation to HST_GSC
× cor_wfc.dat 214 605 1RXS Correlation to ROSAT-WFC
× cor_ros.dat 204 24355 1RXS Correlation to ROSATP3, ROSATWGA, ROSATHRI
× cor_ver.dat 198 1935 1RXS Correlation Catalogue to VERON8 (VII/207)
× refs.dat 137 79 References
× 1rxscorr.txt 225 223982 The ROSAT All-Sky Survey Bright Source
Correlation Catalogue in a single file
× fields.ps 80 1725 Plot describing the field structure (postscript)
× screen.ps 72 34684 Details about screening methods (postscript)
See also:
IX/11 : the ROSAT Source Catalogue (Voges+ 1995)
IX/12 : the WGACAT version of the ROSAT PSPC Catalogue (White+ 1995)
IX/28 : ROSAT HRI Pointed Observations (1RXH) (ROSAT Team, 1999)
J/A+AS/114/465 : ROSAT XUV Pointed Phase Source Catalogue (Kreysing+ 1995)
J/MNRAS/274/1165 : The 2RE Source Catalogue (Pye+ 1995)
http://www.xray.mpe.mpg.de/rosat/survey/rass-bsc : the WWW page
Byte-by-byte Description of file: 1rxs.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [1RXS]
6- 21 A16 --- 1RXS ROSAT All-Sky Survey Catalogue source name (1)
22 A1 --- n_1RXS [*] Names modified from previous version
24- 32 F9.5 deg RAdeg Right ascension (J2000), decimal degrees
34- 42 F9.5 deg DEdeg Declination (J2000), decimal degrees
45- 46 I2 arcsec PosErr ?=0 Total positional error
(including 6" systematic error)
48- 52 A5 --- ScrFlags [T_] screening flags (2)
54- 57 A4 --- NewFlag [T._] 'new data' flags (3)
60- 68 E9.3 ct/s Count ?=0 Source countrate (4)
70- 78 E9.3 ct/s e_Count ?=0 Error on Count (4)
80- 88 E9.3 ct/s/arcmin2 bgCt ?=0 Background countrate (4)
91- 95 I5 s ExpTime ?=0 Exposure time
97-101 F5.2 --- HR1 [-1/1]? Hardness ratio 1 (5)
103-106 F4.2 --- e_HR1 ? Error on HR1 (6)
108-112 F5.2 --- HR2 [-1/1]? hardness ratio 2 (5)
114-117 F4.2 --- e_HR2 ? Error on HR2 (6)
121-123 I3 arcsec Extent Source extent, by which the source image
exceeds the point spread function.
125-128 I4 --- L_Extent ?=0 Likelihood of source extent (7)
130-133 I4 --- Ldetect ?=0 Likelihood of
source detection algorithm (7)
135-139 I5 arcsec ExtRad ?=0 Extraction radius
141-146 A6 --- PrioFlags [01] priority flags (8)
147 A1 --- PHA [ABCDb] PHA range of best detection (9)
149-152 F4.2 --- VigFactor ?=0 Vignetting factor
154-159 I6 "YYMMDD" IncDate ?=0 Date when source was included (10)
161-166 I6 "YYMMDD" UpdDate ?=0 Date when source properties changed (11)
168-170 I3 --- Ncand Number of identification candidates in the
correlation catalogue
173-180 I8 --- SASS Identification number of SASS field (12)
181 A1 --- --- [_]
182-185 I4 --- MASOL SASS source number (MASOL number)
in SASS field (mainly for internal use)
Note (1): The name includes the '1RXS' acronym, and is based
on J2000 position (format JHHMMSS.S+DDMMSS).
This name is used in the generation of a link to a broad band
image if this image is available (see NewFlag, and Note (3))
See the changes in sources compared to the 1996 version in the
"History" section below
Note (2): the flags are 'T' for 'true', 'F' or '_' for 'false'; '.' for not used
n (byte 48) nearby sources affecting SASS flux determination
p (byte 49) possible problem with position determination
e (byte 50) source extended beyond SASS extraction radius
d (byte 51) complex diffuse emission pattern
m (byte 52) source missed by SASS
Note (3): the flags are 'T' for 'true', 'F' or '_' for 'false'; '.' for not used
r (byte 54) source counts and extraction radius recalculated
i (byte 55) broad band image available (html link!)
v (byte 56) variability flag (not yet filled)
. (byte 57) dummy flag
Note (4): Countrates are vignetting corrected
Note (5): The hardness ratios are defined by:
hr1 = ( B - A ) / ( B + A ) , where
A = countrate in PHA range 11 - 41 (~ 0.1-0.4 keV)
B = countrate in PHA range 52 - 201 (~ 0.5-2.0 keV)
hr2 = ( D - C ) / ( D + C ) , where
C = countrate in PHA range 52 - 90 (~ 0.5-0.9 keV)
D = countrate in PHA range 91 - 201 (~ 0.9-2.0 keV)
(PHA = Pulse Height Amplitude)
Note (6): the true mean error is probably bigger, and
values larger than 9.99 are set to 9.99
Note (7): values larger than 9999 are set to 9999
Note (8): the flags indicate the sliding window detection history
using either the background map (M) or the local background (B),
and take the values 0 = no detection, 1 = detection;
The order of flags is:
M-broad, L-broad, M-hard, L-hard, M-soft, L-soft
Note (9): the PHA (Pulse Height Amplitude) range
PHA range with highest detection likelihood is indicated by
A = PHA range 11-41 (~ 0.1-0.4 keV)
B = PHA range 52-201 (~ 0.5-2.0 keV)
C = PHA range 52-90 (~ 0.5-0.9 keV)
D = PHA range 91-201 (~ 0.9-2.0 keV)
b or blank means 'broad'
Note (10): a value "000000" for the date indicates a removed source
Note (11): a value "000000" indicates not-applicable date
Note (12): An overview of the field structure is available at URL
http://www.xray.mpe.mpg.de/rosat/survey/rass-bsc/sup/psplit.ps.gz
Byte-by-byte Description of file: 1rxs_cor.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [1RXS]
6- 21 A16 --- 1RXS 1RXS name
23- 30 F8.4 deg RAdeg Right ascension (J2000)
32- 39 F8.4 deg DEdeg Declination (J2000)
43- 44 I2 arcsec PosErr Total positional error
46- 48 I3 --- Nid Number of correlated sources
50- 54 A5 --- --- Name of source catalogue (always 1RXS)
61 A1 --- bandPos [x] origin of the source position
(always x: X-ray)
75- 80 F6.3 10+21cm-2 gal_Nh Galactic HI column density
(in 1021atoms/cm2)
82- 89 F8.4 deg GLON Galactic longitude
91- 98 F8.4 deg GLAT Galactic latitude
105-109 F5.2 --- HR1 Hardness ratio 1
112-115 F4.2 --- e_HR1 rms uncertainty on HR1
117-121 F5.2 --- HR2 Hardness ratio 2
124-127 F4.2 --- e_HR2 rms uncertainty on HR2
129-131 I3 --- Extent Source extent
133-135 I3 --- L_Extent Likelihood of source extent
137-139 I3 --- Ldetect Likelihood of source detection algorithm
141-145 I5 s ExpTime Exposure time
147-154 E8.2 ct/s Count Source count rate
156-163 E8.2 ct/s e_Count rms uncertainty on Count
166-174 E9.3 mW/m2 Flux1 X-ray flux 1 in 0.1-2.4keV energy range
176-184 E9.3 mW/m2 Flux2 X-ray flux 2 in 0.1-2.4keV energy range
191-196 I6 "YYMMDD" begDate First date of observation
197-199 F3.2 d begDate.f First date of observation (day fraction)
201-206 I6 "YYMMDD" endDate Last date of observation
207-209 F3.2 d endDate.f Last date of observation (day fraction)
212-217 I6 "YYMMDD" IncDate Date when source was included
219-224 I6 "YYMMDD" UpdDate ?=0 Date when source properties changed
Byte-by-byte Description of file: cor_iras.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [1RXS]
6- 21 A16 --- 1RXS 1RXS source name
23- 25 I3 --- Rank Rank in correlation list for the source
27- 47 A21 --- sourceID Source identification (1)
49- 56 F8.4 deg RAdeg [0/360] Right ascension (J2000)
58- 65 F8.4 deg DEdeg Declination (J2000)
68- 70 I3 arcsec Sep Separation
72- 74 I3 deg PA [0/360] Position angle
76- 85 A10 --- r_sourceID Source catalogue (see file "refs.dat")
87 A1 --- bandPos [i] Origin of the source position (i: IR)
89- 98 A10 --- Type Type or class of object
100-108 E9.3 Jy F12um Infrared flux in the 12µm band
110-118 E9.3 Jy F25um Infrared flux in the 25µm band
120-128 E9.3 Jy F60um Infrared flux in the 60µm band
130-138 E9.3 Jy F100um Infrared flux in the 100µm band
140-164 A25 --- Com Comments
166-171 I6 "YYMMDD" IncDate Date when source was included
173-178 I6 "YYMMDD" UpdDate ?=0 Date when source properties were changed
Note (1): the IRASPSC numbers do not correspond to the usual IRAS designations.
Byte-by-byte Description of file: cor_ned.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [1RXS]
6- 21 A16 --- 1RXS 1RXS source name
23- 25 I3 --- Rank Rank in correlation list for the source
27- 47 A21 --- sourceID Source identification
49- 56 F8.4 deg RAdeg [0/360] Right ascension (J2000)
58- 65 F8.4 deg DEdeg Declination (J2000)
68- 70 I3 arcsec Sep Separation
72- 74 I3 deg PA [0/360] Position angle
76- 85 A10 --- r_sourceID Source catalogue (see file "refs.dat")
87 A1 --- bandPos [giorx] Origin of the source position (1)
89- 98 A10 --- Type Type or class of object
101-105 F5.2 --- fxfopt ? Ratio of X-ray to optical flux f_X / f_opt
107 A1 --- l_vmag Limit flag on vmag
108-113 F6.3 mag vmag ? Visual magnitude
114 A1 --- n_vmag [:/+] : => Uncertainty flag on vmag
/ => interval of magnitude
+ => 18+ ???
115-116 I2 --- vmag2 ? Second value of vmag when interval
117 A1 --- u_vmag2 [?] Uncertainty flag on vmag2
119-124 F6.4 --- z ? Redshift
126 A1 --- l_NED-flux Limit flag on NED-flux
127-135 F9.2 mJy NED-flux ? Radio flux density or IR flux density
in the band given in fl-band
137-145 E9.3 mum fl-band ? Frequency band or wavelength band
used for flux given in NED-flux
(Radio [GHz], IR [mJy] for NED)
147 A1 --- l_Size Limit flag on Size
148-154 F7.3 arcmin Size ? Size of object
155 A1 --- u_Size Uncertainty flag on Size
157-181 A25 --- Com Comments
184-189 I6 "YYMMDD" IncDate Date when source was included
191-196 I6 "YYMMDD" UpdDate ?=0 Date when source properties were changed
Note (1): o: optical; x: X-ray; r: Radio; e: EUV; i: IR
Byte-by-byte Description of file: cor_nvs.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [1RXS]
6- 21 A16 --- 1RXS 1RXS source name
23- 25 I3 --- Rank Rank in correlation list for the source
27- 47 A21 --- sourceID Source identification
49- 56 F8.4 deg RAdeg [0/360] Right ascension (J2000)
58- 65 F8.4 deg DEdeg Declination (J2000)
68- 70 I3 arcsec Sep Separation
72- 74 I3 deg PA [0/360] Position angle
76- 85 A10 --- r_sourceID Source catalogue (see file "refs.dat")
87 A1 --- bandPos [orx] Origin of the source position (1)
89- 98 A10 --- Type Type or class of object
100-106 F7.1 kpc dist ? Distance
108-115 F8.2 mJy F20cm(I) ? Radio integrated flux density in the
20cm band
117-125 F9.2 mJy F20cm(P) ? Radio peak flux density in the 20cm band
127-132 I6 "YYMMDD" IncDate Date when source was included
134-139 I6 "YYMMDD" UpdDate ?=0 Date when source properties were changed
Note (1): o: optical; x: X-ray; r: Radio; e: EUV; i: IR
Byte-by-byte Description of file: cor_hst.dat cor_pri.dat cor_wfc.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [1RXS]
6- 21 A16 --- 1RXS 1RXS source name
23- 25 I3 --- Rank Rank in correlation list for the source
27- 47 A21 --- sourceID Source identification (see also r_sourceID)
49- 56 F8.4 deg RAdeg [0/360] Right ascension (J2000)
58- 65 F8.4 deg DEdeg Declination (J2000)
68- 70 I3 arcsec Sep Separation
72- 74 I3 deg PA [0/360] Position angle
76- 85 A10 --- r_sourceID Source catalogue (see file "refs.dat")
87 A1 --- bandPos [oexr] Origin of the source position (1)
89- 98 A10 --- Type Type or class of object
101-105 F5.2 --- fxfopt ? Ratio of X-ray to optical flux f_X / f_opt
107 A1 --- l_vmag Limit flag on vmag
108-112 F5.2 mag vmag ? Visual magnitude
115-119 F5.2 mag bmag ? Blue magnitude
122-126 F5.2 mag rmag ? Red magnitude
129-133 F5.2 mag b-r ? (blue-red) colour
135-139 F5.2 mag b-v ? (blue-visual) colour
142-146 F5.2 mag u-b ? (ultraviolet-blue) colour
149-150 A2 --- var Variability flag
153 A1 --- n_z [*>] Note on z
154-159 F6.4 --- z ? Redshift (from PRI or SIMBAD)
161-165 I5 km/s Vr ? Radial velocity (from SIMBAD only)
167-174 E8.3 kpc dist ? Distance
176-200 A25 --- Com Comments
202-207 I6 "YYMMDD" IncDate Date when source was included
209-214 I6 "YYMMDD" UpdDate ?=0 Date when source properties were changed
Note (1): o: optical; x: X-ray; r: Radio; e: EUV; i: IR
Byte-by-byte Description of file: cor_ros.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [1RXS]
6- 21 A16 --- 1RXS 1RXS source name
23- 25 I3 --- Rank Rank in correlation list for the source
27- 47 A21 --- sourceID Source identification
49- 56 F8.4 deg RAdeg [0/360] Right ascension (J2000)
58- 65 F8.4 deg DEdeg Declination (J2000)
68- 70 I3 arcsec Sep Separation
72- 74 I3 deg PA [0/360] Position angle
76- 85 A10 --- r_sourceID Source catalogue (see file "refs.dat")
87 A1 --- bandPos [ex] Origin of the source position (1)
89- 98 A10 --- Type Type or class of object
100-104 F5.2 --- HR1 ? Hardness ratio 1
107-110 F4.2 --- e_HR1 ? rms uncertainty on HR1
112-116 F5.2 --- HR2 ? Hardness ratio 2
119-122 F4.2 --- e_HR2 ? rms uncertainty on HR2
124-126 I3 --- Extent ? Source extent
128-130 I3 --- L_Extent ? Likelihood of source extent
132-134 I3 --- Ldetect ? Likelihood of source detection algorithm
135-140 I6 s ExpTime Exposure time
142-149 E8.2 --- Count Source countrate
151-158 E8.2 --- e_Count rms uncertainty on Count
161-164 F4.1 arcmin roff Off-axis angle
166-190 A25 --- Com Comments
192-197 I6 "YYMMDD" IncDate Date when source was included
199-204 I6 "YYMMDD" UpdDate ?=0 Date when source properties were changed
Note (1): o: optical; x: X-ray; r: Radio; e: EUV; i: IR
Byte-by-byte Description of file: cor_ver.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [1RXS]
6- 21 A16 --- 1RXS 1RXS source name
23- 25 I3 --- Rank Rank in correlation list for the source
27- 47 A21 --- sourceID Source identification
49- 56 F8.4 deg RAdeg [0/360] Right ascension (J2000)
58- 65 F8.4 deg DEdeg Declination (J2000)
68- 70 I3 arcsec Sep Separation
72- 74 I3 deg PA [0/360] Position angle
76- 85 A10 --- r_sourceID Source catalogue (see file "refs.dat")
87 A1 --- bandPos [oAOR] Origin of the source position (1)
89- 98 A10 --- Type Type or class of object
101-105 F5.2 --- fxfopt ? Ratio of X-ray to optical flux f_X / f_opt
107 A1 --- l_vmag Limit flag on vmag
108-112 F5.2 mag vmag ? Visual magnitude
114-118 F5.2 mag rmag ? Red magnitude
120-124 F5.2 mag b-v ? (blue-visual) colour
127-131 F5.2 mag u-b ? (ultraviolet-blue) colour
133 A1 --- n_z [*>]Note on z
134-138 F5.3 --- z ? Redshift
141-148 F8.2 mJy R-f6cm ? R-f6cm in the 6cm band
151-158 F8.2 mJy R-f11cm ? R-f11cm in the 11cm band
160-184 A25 --- Com Comments
186-191 I6 "YYMMDD" IncDate Date when source was included
193-198 I6 "YYMMDD" UpdDate ?=0 Date when source properties were changed
Note (1): o: optical; x: X-ray; r: Radio; e: EUV; i: IR
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 10 A10 --- catal-id Name of source catalogue
12- 36 A25 --- Aut Author names
38- 56 A19 --- BibCode BibCode
58-137 A80 --- Com Comments
History:
* 15-Jul-1996 (Catalog IX/10):
The catalog (Version 14-Jun-1996) was copied via FTP from
ftp://ftp.rosat.mpe-garching.mpg.de/archive/survey/rass-bsc
* 11-Oct-1999 (Catalog IX/10A):
The catalog (Version 10-Jun-1999) was copied via FTP from
ftp://ftp.xray.mpe.mpg.de/rosat/catalogues/rass-bsc
Compared to the 14-Jun-1996 version:
=> five sources were removed:
1RXS J050251.5-622744
1RXS J054919.1-620511
1RXS J055054.2-621454
1RXS J055225.0-640206
1RXS J055529.5-640618
=> 14 sources were renamed:
1RXS J050531.2-614456 renamed 1RXS J050531.3-614456
1RXS J050644.7-610943 renamed 1RXS J050644.8-610943
1RXS J051545.5-643812 renamed 1RXS J051545.6-643812
1RXS J051615.8-631319 renamed 1RXS J051615.9-631319
1RXS J051934.0-604800 renamed 1RXS J051934.1-604800
1RXS J052124.2-641851 renamed 1RXS J052124.3-641851
1RXS J052630.7-602227 renamed 1RXS J052630.8-602227
1RXS J052641.0-623959 renamed 1RXS J052641.1-623959
1RXS J053431.8-601613 renamed 1RXS J053431.9-601613
1RXS J053855.5-640457 renamed 1RXS J053855.6-640457
1RXS J054053.0-614312 renamed 1RXS J054053.1-614312
1RXS J054236.0-615414 renamed 1RXS J054236.1-615414
1RXS J054513.1-595527 renamed 1RXS J054513.2-595527
1RXS J181545.4+164043 renamed 1RXS J181545.4-164043
* 07-Jun-2006: file "refs.dat" completed for TYCHO, WGA, GSC
associated with pecularity notes.
* 22-Jul-2008: New URLs for ROSAT. Catalog is now available at
ftp://ftp.xray.mpe.mpg.de/rosat/catalogues/rass-bsc
================================================================================
(End) Francois Ochsenbein, Patricia Bauer [CDS] 05-Nov-1999