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IX/30               Second ROSAT PSPC Catalog        (ROSAT, 2000)

The Second ROSAT Source Catalog of Pointed Observations ROSAT Consortium <ROSAT News 72, 25-May-2000 (2000)>
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:
FileName Lrecl Records Explanations
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
See also: : 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
Bytes Format Units Label Explanations
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)
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)
Byte-by-byte Description of file: seqp.dat
Bytes Format Units Label Explanations
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
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.
History: * 29-Jun-2000: First copied from The columns S and m_2RXP were added at CDS. * 22-Jul-2000: A new version was distributed (message from Jakob Englhauser, MPE, ) -- the previous version contained almost no source with Declination between 0 deg and -1 deg. * 22-Jul-2008: New ROSAT URLs :
(End) Francois Ochsenbein [CDS] 22-Jul-2000
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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