ROSHRI - ROSAT Results Archive Sources for the HRI
The ROSHRI table excludes sources that meet the following parameter criteria: false_det = 'T' or deferred = 'T' or not_checked = 'T' or un_unique ='T'. See the documentation below for descriptions of these parameters.
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.
http://heasarc.gsfc.nasa.gov/docs/rosat/rra/RRA.html http://hea-www.harvard.edu/rosat/rra.html http://www.mpe.mpg.de/xray/wave/rosat/rra/index.php 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) 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 brightness suspect MULT_DET complex emission split into individual sources NOT_CHECKED source not checked 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 UN_UNIQUE source matched with another source which was identified in a smaller detect cell (HRI only)
Source right ascension (degrees)
Source declination (degrees)
Source Galactic Longitude (degrees)
Source Galactic Latitude (degrees)
Exposure live time (seconds)
Edge proximity indicator
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 (8 arcsec/pixel)
Blocked y source position (8 arcsec/pixel)
SASS level 1 x coordinate (0.5 arcsec/pixel)
SASS level 1 y coordinate (0.5 arcsec/pixel)
Off axis angle averaged over observation (arcmin)
Radius of source circle for source intensity measurement (arcsec)
Total (source + background) counts within CIR_RAD
Error on total (source + background) counts within CIR_RAD
Bkg counts inside CIR_RAD
Estimate of net rate in the ROSAT band (roughly 0.2-2.4 keV), in ROSAT counts/sec.
Error of net rate (count/sec)
1 keV Quantum efficiency which has been used to derive Count_Rate
1 keV vignetting correction for source which has been used to derive Count_Rate
1 keV scattering correction for source which has been used to derive Count_Rate
X source detect cell size (arcsec)
Y source detect cell size (arcsec)
Total counts in detection box
Threshold for detection at this location (counts)
Signal-to-noise ratio for detection
Probability that the source is unresolved: a statistic which measures how well the radial distribution matches the expected PRF. A good match produces Src_Prob=1.0
X position of extended circle (0.5 arcsec/pixel)
Y position of extended circle (0.5 arcsec/pixel)
Radius of the extended circle (arcsec)
Extended circle scattering correction
Extended circle size correction
Error of extended circle size correction
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 SASS for the given sequence
Date of sequence and source checking (yymmdd)
Sequence identification (like rh400623n00)
Observation ID (like US400623H.N1)
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
Detection of unreal or false source
Source brightness suspect
Source lightcurve suspect (this flag is currently not filled since no lightcurves are available for HRI sources)
Complex emission split
Weak source below SNR threshold used for checking
Source position suspect
Associated source nearby
Source variability indicator from SASS is suspect
Source within extended emission
Detection is matched to another detection with a smaller detect cell size
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.
Field not flagged by operator
Aspect solution suspect
Extended emission in field
False detections in field
Sources in field missed
Source list missing
Source variability flag from SASS
Name of source following IAU conventions, like: 2RXH J153127.5+312918. Note: Source names in 1st release of catalogue are blank; these names will be defined from a final source matching of detections.
Name of catalogued detection following IAU conventions, like: 1RXH J153127.5+312918. Note: The detection 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.
Unique name for detection, based on the observation sequence id and the number of the detection in the source list for that sequence, like: 1rh200855n00.123
Source comment which may have been assigned by the checker