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IX/11 ROSAT Source Catalog (Voges+ 1994)
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ROSAT Source Catalog, Version 11-May-1995
Voges W., Gruber R., Haberl F., Kuerster M., Pietsch W., Zimmermann H.U.
<ROSAT NEWS No.32 (01-Nov-1994)>
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ADC_Keywords: X-ray sources
Mission_Name: ROSAT
Description:
This catalogue contains sources from PSPC-ROSAT (Position-sensitive
Proportional Counter aboard the Roentgen Satellite), as provided
by Max-Planck Institut fuer extraterrestrische Physik (MPE) in
December 1994.
The WGACAT version of the ROSAT PSPC Catalogue (IX/12) is a similar
catalogue with slightly different reduction procedures
For a description of the ROSAT Mission, see Truemper (1983)
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
rosatsrc.dat 248 74301 The ROSAT Source Catalogue
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See also:
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1996)
IX/12 : the WGACAT version of the ROSAT PSPC Catalogue (White+ 1995)
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/ : Public ROSAT Data Archive
Byte-by-byte Description of file: rosatsrc.dat
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Bytes Format Units Label Explanations
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5- 24 A20 --- Seq ROSAT observation sequence number
26- 29 I4 --- MASOL MASOL main running number
31- 52 A22 --- Name ROSAT source name (1RXP) (1)
54- 62 F9.5 deg RAdeg Right ascension (J2000), decimal degrees
64- 72 F9.5 deg DEdeg Declination (J2000), decimal degrees
74- 82 F9.5 deg GLON Galactic longitude
84- 92 F9.5 deg GLAT Galactic latitude
94- 98 F5.1 arcsec ErrML Positional accuracy: error radius of
Maximum Likelihood algorithm
100-104 F5.1 arcsec ErrBor Positional accuracy: boresight error
106-110 F5.1 arcsec ErrSys Positional accuracy: systematic error
112-116 F5.1 arcsec PosErr Total Positional accuracy
118-123 F6.2 arcmin OffAxis Off-axis radius in arcmin
125-133 E9.3 ct/s Count Source countrate (vignetting corrected)
135-143 E9.3 ct/s e_Count Mean error on Count
145-153 E9.3 ct/s/arcmin2 bgCt Background countrate
155-162 F8.0 s ExpTime Exposure time
163-168 F6.2 --- HR1 Hardness ratio 1 (2)
169-174 F6.2 --- e_HR1 Error on HR1
175-180 F6.2 --- HR2 hardness ratio 2 (2)
181-186 F6.2 --- e_HR2 Error on HR2
187-193 F7.1 --- Extent Source extent, by which the source image
exceeds the point spread function.
194-200 F7.1 --- L_Extent Likelihood of source extent
201-208 F8.0 --- ML Likelihood from maximum-likelihood method
209-214 I6 --- Ldetect Likelihood of source detection algorithm
215-219 I5 arcsec RibDist Distance to next rib or edge
220-224 I5 arcsec SrcDist Distance to next source before screening
225-229 I5 arcsec SrcDist2 Distance to next source after screening
231-236 A6 --- PrioFlags [01] Source detection string (3)
237 A1 --- PHA [ABCDb ] Source detection string (4)
239-241 I3 45arcsec Cell Detect cell size (5)
242-246 F5.2 --- VigFactor []?=0 Vignetting factor (6)
248 A1 --- Confuse [YN] Confusion indicator
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Note (1): The name includes the '1RXP' acronym, and is based
on J2000 position (format JHHMMSS.S+DDMMSS).
Note (2): 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 (3): 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 (4): 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 (5): the basic detect cell size is 3x3 pixels, or 45x45arcsec;
a value of 2 indicates a detect cell size of 90x90arcsec,
a value of 4 indicates a detect cell size of 3x3arcmin,
and a value of 8 a detect cell size of 6x6arcmin.
Note (6): the vignetting factor increases from 1 for sources detected
on the axis to higher values when the source was detected off-axis.
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History:
From ftp://rosat_svc.mpe-garching.mpg.de/archive/sourcecat
Acknowledgements:
Thanks are due to Christian Motch <motch@astro.u-strasbg.fr> and
Wolfgang Voges <whv@mpe-garching.mpg.de> for their help in the
preparation of this document.
References:
Truemper J., 1983, Adv. in Space Res. 2, No.4, 241.
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(End) Francois Ochsenbein [CDS] 15-Jul-1996