filename: flags.sum Date: 23 Sep 95 originat: wnp/deh tlm: 1 Mar 95 Subject: OVERVIEW OF THE QUALITY CONTROL FLAGS FOR THE ROSAT RESULTS ARCHIVE This summary of all flags is based on the original plan from the Sept 94 meeting at MPE. It has been updated to reflect changes agreed upon at the Feb 95 meeting. Source flags use lower case letters; Field flags are upper case. A flag has the value f (false) if the parameter is ok; or t (true) if the parameter is wrong or suspect. Most, but not all, flags apply to both PSPC and HRI, although occasionally the precise definition is somewhat different. The column 'VI' means 'visual inspection'. 4 OCT 94 - 'u' flag added by deh for HRI 1 MAR 95 - delete O field flag; change P to S; add 'a' flag. -------------------------------------------------------------------------------------- Notes: VI visual inspection Flags are all T/F (not qualitative flags); Flags are warnings about reliability of parameters &/or presented errors; Flags are NOT definitive statements about source reliability. --------------------------------------------------------------------------------------------------------------------------------- In addition new PSPC parameter per source: varnew_ind variability indicator pos_err_map position error for map detect sources ROSAT_name ROSAT source designation (1sx.1' accuracy) comment comment In addition new parameters per sequence: flg_stat number of source flags set of each type num_src number of detected sources by SASS bkg_stat total time in 4 (tbd) background levels bkg_levs lower boundary of background levels QC_site site of quality control QC_date date of quality control QC_SYS version nr. of quality control software QC_person person responsible for quality control comment line missed_tab table of missed source(s), positions, etc. Source Flags ============ Letter Name PSPC Description PSPC Genesis VI HRI Description HRI Genesis ------ ---- ---------------- ------------ -- --------------- ----------- a assoc_nn associated w. algorithm; extent nn associated with algorithm: nearest neighbor PRF(E,theta) any source in field PRF(theta), REC c confused close sources visual inspection yy close sources visual inspection confounded detect confounded detect d det_struct source near rib compare psf with nn source near outer edge taken from edge rib and edge distance proximity indicator e extended source extended from extent size and nn source may be larger SIZCOR > 1.2 extent likelihood psf f false_det source reality visual overlay yy source reality visual overlay doubtful doubtful i Inten_susp intensity values flag if confused, nn all intensity flag if extended may be suspect mult_det, det_struct values may be suspect or det_struct set or within_ext set or A,a,c,w l ltc_susp lightcurve from extraction n extraction may radius and nearest be incorrect source distance due to nearby source contamin. or detect_struc. m mult_det complex emission visual inspection yy complex or strong visual inspection split into individual emission produced sources multiple detections of a single source n not_checked no visual inspection ML<15, or D set nn source not flag if unexamined source examined for set if S/N < threshold reliability set if field deferred (D) p pos_susp possible problem with overlay of derived yy possible problem with 1) overlay of derived position determination sources on image position determination sources on image; s spec_susp raw spectrum for compare bg extract n spectral fits suspect radius with nearest source u un_uniq n source is not unique if there is a matched detection made with a smaller detect cell v varflg_susp - - n believability of compare variability flag variability flag of source and background w within_ext believable source visual inspection yy believable source visual inspection embedded in extended embedded in extended emission emission FIELD/SEQUENCE FLAGS ==================== Letter Name PSPC Description PSPC Genesis VI HRI Description HRI Genesis ------ ---- ---------------- ------------ -- --------------- ----------- A asp_susp aspect solution ? yy aspect solution inner sources look may be in error may be in error oval B bkg_susp wrong BG image ? nn High BG or other extended emission flag or Av BG > level 8 D deferred peculiarities to yy peculiarities to be dealt with later be dealt with later E ext_emis may affect sources visual inspection of yy may affect sources visual inspection &/or bgd image &/or bgd of image F fals_det presence of possibly f source flag set for nn presence of possibly f source flag set for spurious sources in 1 or more sources spurious sources in 1 or more sources image image M src_mis probable sources visual inspection of yy probable sources visual inspection of missed by detect source overlay missed by detect source overlay O other other problems not yy other problems not classified were classified were found found S slist_mis source list check of empty or nn source list check of empty or missing or empty missing files missing or empty missing files