ROSPSPC - ROSAT Results Archive Sources for the PSPC
The ROSPSPC table excludes sources that meet the following parameter criteria: false_det = 'T' or deferred = 'T' or not_checked = 'T'. See the documentation below for descriptions of these parameters.
The catalog consists of all primary source parameters from the automated detection algorithm employed by the SASS. In addition each observation has been quality checked, both by automatic algorithms and by detailed visual inspection. The results of this quality checking are contained as a set of logical-value flags for a set of principal source parameters. If a source parameter is suspect, the associated flag is set to "TRUE"; parameters with no obvious problems maintain the default, "FALSE", value.
http://heasarc.gsfc.nasa.gov/docs/rosat/rra/RRA.html http://hea-www.harvard.edu/rosat/rra.html http://www.aip.de/groups/xray/rosat/rra.html http://ledas-www.star.le.ac.uk/rra
All flags are LOGICAL, i.e. they have a value of TRUE or FALSE. A flag with a TRUE value indicates a possible problem with a source parameter. Thus, a source with no discernable problem would have all flags set to FALSE.
Sequence flags: =============== FLAG NAME "True" condition --------- ---------------- ASP_SUSP obvious aspect problems (sources appear multiple or have obvious ellipticity) (*) EXT_EMIS presence of extended emission over most of the field FIELD_FDET one or more detected sources deemed false DEFERRED data screening not done MISS_SRC one or more obvious sources not detected by SASS BKG_SUSP field background may be incorrect (due to inclusion of high background intervals or extended emission) SLIS_MIS source list is missing (no sources detected by SASS or source detection stopped) EXPO_MAP the exposure map is not correct Source Flags: ============= FLAG NAME "True" condition ---------- ---------------- CONFUSED close sources confused detection algorithm DET_STRUCT source near detector structure EXTENDED source is probably resolved FALSE_DET detection judged to be spurious INTEN_SUSP source intensity suspect LTC_SUSP source lightcurve may be suspect SPEC_SUSP source spectrum suspect MULT_DET complex emission split into individual sources NOT_CHECKED source not checked visually by operator POS_SUSP source position suspect (*) ASSOCIATED another source nearby may influence derived source quantities VARFLG_SUSP SASS variability flag suspect WITHIN_EXT source within extended emission (*) Note: The ASP_SUSP and POS_SUSP flags have been set for all observations after the loss of the second startracker on 1998-Apr-25.
Source Right Ascension
Source Galactic Longitude
Source Galactic Latitude
Unblocked x source position (0.5 arcsec/pixel)
Unblocked y source position (0.5 arcsec/pixel)
Error in position (0.5 arcsec/pixel)
Blocked x source position (15 arcsec/pixel)
Blocked y source position (15 arcsec/pixel)
Source X error in image pixels
Source Y error in image pixels
SASS level 1 x coordinate
SASS level 1 y coordinate
Off axis angle averaged over observation (arcmin)
Source count rate from ML or MDETEC (cts/s), pha channel 11 to 235
Error of count rate (cts/s), pha channel 11 to 235
Bkg surface countrate (cts/s/arcmin**2)
Source detect cell size (arcsec)
Exposure live time (s)
Maximum likelihood from ML algorithm
Distance from source to nearest source (arcsec)
Distance from source to nearest rib (arcsec)
sigma of gaussian distribution fitted to data (arcsec)
Source likelihood of extent
Hardness ratio (B-A)/(B+A), where A = counts in PHA-channel 11-41 and B = counts in PHA-channel 52-201
Error in hardness ratio 1
Hardness ratio (D-C)/(D+C), where C = counts in PHA-channel 52-90 and D = counts in PHA-channel 91-201
Error in hardness ratio 2
Reduced chi-square of power law fit
Reduced chi-square of Raymond-Smith fit
Mean vignetting correction
Source net counts for PHA-channel 11-41
Source net counts for PHA-channel 52-201
Source net counts for PHA-channel 52-90
Source net counts for PHA-channel 91-201
Error on source net counts for PHA-channel 11-41
Error on source net counts for PHA-channel 52-201
Error on source net counts for PHA-channel 52-90
Error on source net counts for PHA-channel 91-201
corrected src-rib dist
corrected src-src dist
Source likelihood from the L/MDETECT algorithm
Extraction radius in MAX LIKELIHOOD algorithm (?arcsec)
Observation start date
Observation finish date
ROSAT Observation Request number assigned to the observing program. Typically the target of each pointed observation will have a unique ROR number assigned to it.
Source number from the merged source list (MPLSX)
Source number from the final source list (SOLST)
Date on which this particular observation was visually inspected (yymmdd)
Rationalized Data Format root file name; changed 980403 from FNAME. An observing sequence consists of a number of files with names like SEQID_suffix.fits. For example, rp900176n00_bas.fits is the name of the "basic" events file for the pointing named by SEQID="rp900176n00".
Observation ID used during SASS processing
Processing Site (either MPE or GSFC)
Filter (either NONE or BORON); for the ROSPSPC table, FILTER="NONE" since all the filtered observations are listed in a separate table (ROSPSPCF)
Bit-encoded value which signifies in which band(s) the detection was made. A bit value = 1 means a detection, 0 means no detection. The bits are encoded as follows:
BIT Type 00 LDETEC, broad band 01 LDETEC, soft band 02 LDETEC, hard band 03 MDETEC, broad band 04 MDETEC, soft band 05 MDETEC, hard band
Flag set to Y if the counts(net_rt) from the MDETEC (maximum likelihood detection) algorithm rather than the LDETEC (Local detect) algorithm.
Variability flag from chi-square test
Variability flag from KS test
Variability flag from U test
Variability flag from FFT test
Summary of source flags. This is a string of abbreviations for each source flag which is set to TRUE, and indicates a possible problem with the source. The abbreviations used are c=CONFUSED, d=DET_STRUCT, e=EXTENDED f=FALSE_DET, i=INTEN_SUSP,l=LTC_SUSP, s=SPEC_SUSP, m=MULT_DET, n=NOT_CHECKED, p=POS_SUSP,a=ASSOCIATED, v=VARFLG_SUSP, w=WITHIN_EXT.
Close sources confused detect
Source near detector structure
Source brightness suspect
Source spectrum suspect
Source lightcurve suspect
Complex emission erroneously split into numerous point sources
Source not checked
Source position suspect
Associated source nearby
Source variability flag suspect
Source within extended emission
Summary of sequence flags. This is a string of abbreviations for each sequence flag which is set to TRUE, and indicates a possible problem with the sequence. The abbreviations used are A=ASP_SUSP, E=EXT_EMIS, F=FIELD_FDET, D=DEFERRED, M=MISS_SRC, B=BKG_SUSP, S=SLIS_MIS, X=EXPO_MAP.
Possible aspect problems?
Possible bkg problems?
Significant extended emission
False detections present
Missed sources present
No source list available
Variability flag (see comments below)
Name of source, like: 2RXP J153127.5+312918)
Name of detection, like: 1RXP J153127.5+312918)
Name of detection, like: 1rp200855n00.123