By setting the values of different housekeeping parameters using the XRTHK program the User is able exclude unwanted times in the original dataset. XRTHK produces a list of on/off MJD's times which are passed in to XRTSORT.
The following list of parameters upon which the user is able to search in XRTHK has been compiled from the ASPECT and EVRATE extension of the ANCILLARY RDF data file
EVRATE FITS EXTENSION PARAMETER DESCRIPTION TIME / Spacecraft time of event MV_ACO / MV anticoincidence rate XTRANSM / Transmitted X-ray rate A1_AL / Events in anode A1 above low level threshold A2_AL / Events in veto anode A2 above low level thresho A1AL_MV / Events in A1 above low level thresh in antico. XACC / Accepted X-ray rate SA_RATE / SA-RATE SAADA_RT / SAA detector A rate SAADB_RT / SAA detector B rate A1_AH / Events in anode A1 above high level threshold A2_AH / Events in veto anode A2 above high level thresh |K1_EDGE / Rate of events in edge strips of front cathode K2_EDGE / Rate of events in edge strips of back cathode K K1_PASS / Rate of events in K1 passing event selection K2_PASS / Rate of events in K2 passing event selection MV_CNT / MV anticoincidence counter XTR_CNT / Transmitted X-ray events counter A1AL_CNT / Counter of events in A1 above low level threshold A2AL_CNT / Counter of events in A2 above low level threshold XACC_CNT / Accepted X-ray events PING_CNT / Ping counter A1AH_CNT / Events in A1 above high level A2AH_CNT / Events in A2 above high level K1ED_CNT / Events in edge strips of K1 K2ED_CNT / Events in edge strips of K2 K1PA_CNT / Events in K1 passing event selection logic K2PA_CNT / Events in K2 passing event selection logic ASPECT FITS EXTENSION PARAMETER DESCRIPTION TIME / Spacecraft time of corrected aspect (sec) MJD_INT / Integer portion of UT in MJD MJD_FRAC / Fractional portion of UT in MJD RA_CAS / Corrected right ascension (offset from RA_NOM) DEC_CAS / Corrected declination (offset from DEC_NOM) ROAN_CAS / Corrected roll angle (offset from ROLL_NOM) ASP_QUAL / Aspect quality STT_QUAL / Star tracker flag RA_SC / Right ascension of spacecraft pointing DEC_SC / Declination of spacecraft pointing ROAN_SC / Roll angle of spacecraft pointing RA_ERR / 1-sigma error of RA_SC DEC_ERR / 1-sigma error of DEC_SC ROAN_ERR / 1-sigma error of ROAN_SC STATUS / Aspect status