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IX/30 Second ROSAT PSPC Catalog (ROSAT, 2000)
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The Second ROSAT Source Catalog of Pointed Observations
ROSAT Consortium
<ROSAT News 72, 25-May-2000 (2000)>
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ADC_Keywords: X-ray sources ; Surveys
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). It
supersedes the 1994 version (Cat. <IX/11>)
The current release of the catalog is comprised of results from 4093
sequences (sky coverage of 14.5%). The complete version contains
entries for 95,331 detections whereas the short version has 43,156
detections. 2189 obvious sources were not detected by the automated
Standard Analysis Software System (SASS), and are not yet contained in
this catalogue.
These data have been screened by ROSAT data centers in the US,
Germany, and the UK as a step in the production of the ROSAT RESULTS
ARCHIVE. The RRA contains extracted source and associated products
with an indication of reliability for the primary parameters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
2rxp.dat 393 95331 The 2RXP Catalog
2rxp_s.dat 393 43156 The "short" 2RXP Catalog
(restricted to high confidence detections)
seqp.dat 174 4093 The sequences of observations
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See also:
http://wave.xray.mpe.mpg.de/rosat/rra/ : the ROSAT Results Archive Home Page
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1996)
IX/29 : ROSAT All-Sky Survey Faint Source Catalog (Voges+ 2000)
J/A+AS/114/465 : ROSAT XUV Pointed Phase Source Catalogue (Kreysing+ 1995)
J/MNRAS/274/1165 : The 2RE Source Catalogue (Pye+ 1995)
Byte-by-byte Description of file: 2rxp.dat 2rxp_s.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- Seq ROSAT detection sequence number
21 A1 --- S *[S] for source in "short" catalog
22 A1 --- m_2RXP *[a-l] Multiplicity index
23- 26 A4 --- --- [2RXP]
28- 43 A16 --- 2RXP *2RXP designation (Jhhmmss.s+ddmmss)
45- 47 I3 arcsec ErrPos ? Error in position (G1)
50- 58 E9.4 ct/s Crate Estimate of net count rate
60- 67 E8.3 ct/s e_Crate ? Error of Crate (G1)
69- 73 F5.1 --- LhMdet Source likelihood from the L/MDETEC algorithm
(MD_LIKE, truncated at 999.9)
75- 76 I2 arcmin oax Off-axis angle averaged over observation
79- 83 I5 s ExpTime Exposure time
85 A1 --- Var [NTP] Source variability flag:
Negative / Too_few / Possible
88-100 A13 --- SrcFlags *[cdefislmnpavw.] Source Flags
102-109 A8 --- SeqFlags *[DABEFMSX.] Sequence flags
111-116 I6 "YYMMDD" QCdate Date of sequence and source checking
118-121 A4 --- QCsite Checker Site
123-126 A4 --- QDname Checker ID
128-132 A5 --- Com Source comment
136-141 I6 "YYMMDD" Tbeg Observation start date
143-148 I6 "YYMMDD" Tend Observation finish date
150-164 A15 --- ObsID Observation ID (e.g. US400623H.N1)
167-170 A4 --- Site Processing Site (USRS / MPE / PE / SRS)
174-181 F8.4 deg RAdeg Source Right ascension (J2000)
183-190 F8.4 deg DEdeg Source Declination (J2000)
192-199 F8.4 deg GLON Galactic longitude
201-208 F8.4 deg GLAT Galactic latitude
211-216 F6.2 15arcsec imX Blocked x source position
218-223 F6.2 15arcsec imY Blocked Y source position
226-229 F4.2 15arcsec e_imX ? Error on imX (G1)
231-235 F5.2 15arcsec e_imY ? Error on imY (G1)
238-239 I2 arcmin Drb Corrected source-rib distance
(truncated at 99)
241-243 I3 arcmin Dsr [0,99]?=999 Corrected source-source distance
(truncated at 99)
245-249 F5.3 --- Vig *? Vignetting factor (G1)
251-255 F5.2 ct/s/arcmin2 bgCt Background countrate
(truncated to -9.99 ... 99.99)
257-262 A6 --- DetFlags *[01] Source detection string (3)
263 A1 --- DetML *[ABCDb ] band in which ML detection occurred
265-268 I4 --- LhMdet2 Source likelihood from the L/MDETEC algorithm
(truncated at 9999)
270-272 I3 arcsec Dcs Width of detect square
275-277 I3 --- MSX Source number from merged source list (MPLSX)
279 A1 --- Mdet [M.] set to 'M' if Crate was taken from MDETEC
(as well as some other parameters)
281-284 I4 --- LhML ? Source likelihood from the ML algorithm
(ML_LIKE, truncated to 999) (G1)
286-288 I3 arcsec rML Extraction radius used in ML algorithm
291-293 I3 arcsec Ext sigma of Gaussion distribution fitted to data
295-298 I4 --- ExtL Likelihood of source extent
(truncated to 9999)
301-304 A4 --- Vflags *[ckuf.] variability flags
307-311 F5.2 --- HR1 *Hardness ratio 1 (truncated to -9.99...99.99)
313-316 F4.2 --- e_HR1 Error on HR1
318-322 F5.2 --- HR2 *hardness ratio 2 (truncated to -9.99...99.99)
324-327 F4.2 --- e_HR2 Error on HR2
329-334 I6 ct CtA Source net counts PHAch. 11-41 (~0.1-0.4 keV)
336-341 I6 ct CtB Source net counts PHAch. 52-201 (~0.5-2.0 keV)
343-348 I6 ct CtC Source net counts PHAch. 52-90 (~0.5-0.9 keV)
350-355 I6 ct CtD Source net counts PHAch. 91-201 (~0.9-2.0 keV)
357-362 F6.1 ct e_CtA Mean error on CtA
364-369 F6.1 ct e_CtB Mean error on CtB
371-376 F6.1 ct e_CtC Mean error on CtC
378-383 F6.1 ct e_CtD Mean error on CtD
385-388 F4.1 --- cSpl Reduced chi-square of power law fit
to net spectrum (truncated at 99.9)
390-393 F4.1 --- cSRS reduced chi-square of Raymond-Smith fit
to net spectrum (truncated at 99.9)
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Note on S: this flag was added at CDS.
The "short" version file, 2rxs_s.dat, can exactly be reconstructed
from the "full" version file 2rxs.dat by a filter on this column,
i.e. the file 2rxs_s.dat can be recreated by the Unix shell command
grep '^....................S' 2rxs.dat > 2rxs_s.dat
Note on 2RXP, m_2RXP: the name is NOT UNIQUE.
Detections with the same position will have the same detection name;
such detections may or may not represent the same astrophysical
source. A letter (a,b,etc...) was added in the m_2RXP column for
such duplicated duplicated names.
Note on SrcFlags: flags with a dot (.) are turned off (false).
c=CONFUSED : close sources confused detection algorithm
d=DET_STRUCT : source near detector structure
e=EXTENDED : source is probably resolved
f=FALSE_DET : detection judged to be spurious
i=INTEN_SUSP : source intensity suspect
l=LTC_SUSP : source lightcurve may be suspect
s=SPEC_SUSP : source spectrum suspect
m=MULT_DET : complex emission split into individual sources
n=NOT_CHECKED : source not checked visually by operator
p=POS_SUSP : source position suspect
a=ASSOCIATED : another source nearby may influence derived source
v=VARFLG_SUSP : SASS variability flag suspect
w=WITHIN_EXT : source within extended emission
Note on SeqFlags: flags with a dot (.) are turned off (false).
D=DEFERRED : Field not visually examined by operator [always off]
A=ASP_SUSP : Aspect solution suspect [always off]
B=BKG_SUSP : Background suspect
E=EXT_EMIS : Extended emission in field
F=FIELD_FDET : False detections in field
M=SRC_MISS : Sources in field missed
S=SLIS_MIS : Source list missing
X=EXPO_MAP : Exposure map is not correct
Note on Vig: the vignetting factor increases from 1 for sources detected
on the axis to higher values when the source was detected off-axis.
Note on DetFlags: the flags indicate the sliding window detection history
using either the background map (M) or the local background (L),
in the hard / soft and broad bands, and take the values
0 = no detection, 1 = detection
The order of the flags is:
M-broad, L-broad, M-hard, L-hard, M-soft, L-soft
Note on DetML: the value indicates in which band the source was detected:
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 on Vflags: flags with a dot (.) are turned off (false).
c = variability flag from chi-square test (CSQ_FLAG)
k = variability flag from KS test (KS_FLAG )
u = variability flag from U test (U_FLAG )
f = variability flag from FFT test (FFT_FLAG)
Note on HR1, HR2: 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)
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Byte-by-byte Description of file: seqp.dat
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Bytes Format Units Label Explanations
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1- 24 A24 --- RDF Result Data directory and File
26- 29 A4 --- QCSite Checker Site
31- 34 A4 --- QDname Checker ID
36- 41 I6 "YYMMDD" Cdate Checking date
52- 59 A8 --- SeqFlags [DABEFMSX.] Sequence flags, as in 2rxp.dat
63- 67 I5 s ExpTime Exposure Time
70- 75 I6 "YYMMDD" Tbeg Observation begin date
77- 82 I6 "YYMMDD" Tend Observation end date
85- 87 I3 --- Nsrc Number of sources
90- 91 I2 --- Mis Number of missed sources
106 I1 --- --- [0] number of RRA table columns which contain
undefined values for any of the sources
108 I1 --- --- [0] N1 = number of undefined keywords
from primary header
111 I1 --- --- [0] N2 = number of undefined keywords
from secondary header
115 I1 --- Nc Statistics of confused sources
117-118 I2 --- Nd Statistics of sources near detector
120-121 I2 --- Ne Statistics of probably resolved sources
122-124 I3 --- Nf Statistics of spurious detections
125-127 I3 --- Ni Statistics of suspect source intensity
128-130 I3 --- Ns Statistics of suspect lightcurve sources
131-133 I3 --- Nl Statistics of suspect spectrum sources
134-136 I3 --- Nm Statistics of split complex emission sources
137-139 I3 --- Nn Statistics of sources not checked visually
140-142 I3 --- Np Statistics of suspect source positions
143-145 I3 --- Na Statistics of nearby associated sources
146-148 I3 --- Nv Statistics of suspected variability
149-151 I3 --- Nw Statistics of sources within extended emission
153-160 F8.4 deg RAdeg J2000 Right Ascension of observation
162-169 F8.4 deg DEdeg J2000 Declination of observation
171-174 A4 --- Site Processing Site
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Global Notes:
Note (G1): Some parameter values are undefined (blank) if the ML
algorithm did not run (indicated by Mdet='M').
NB: Maximum Liklihood never runs for sources further than
20' from field center.
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History:
* 29-Jun-2000: First copied from
http://wave.xray.mpe.mpg.de/rosat/rra/rospspc
The columns S and m_2RXP were added at CDS.
* 22-Jul-2000: A new version was distributed (message from Jakob
Englhauser, MPE, jer@xray.mpe.mpg.de) -- the previous version
contained almost no source with Declination between 0 deg and
-1 deg.
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(End) Francois Ochsenbein [CDS] 22-Jul-2000