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RXTE Data Anomalies RXTE
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This page is a record of the known anomalies in processed RXTE GO data. For each day, it documents the problems detected in processing, for instance when there is less data than expected based on the scheduled amount of good time. It lists each ObsId affected, the datamode(s), and an explanation if available. In most cases (except where explicitly noted), the existing data are perfectly useable; there is simply less of it than there should be.

To find a specific observation, either look down the chronological list for the right date, or search for the proposal number of the observation. Exact ObsIds might not match, as they may be part of what is listed as a range of viewing numbers.

This page does not include oddities in calibration observations such as 800 series obsids. And it may not be a complete record of every existing anomaly in GO data, so if any problem not listed here turns up, please let us know at xtehelp@athena.gsfc.nasa.gov so that we can explain, fix, and/or document it.


Note on using the data: Cases where there is no good time, or "good time listed as zero", are where ObsCat finds no good time based on the attitude and schedule information, and the GTI extensions in all science data files will have intervals of 0.0 to 0.0. These will be ignored by some software, so be carefule to make correct GTI files using the housekeeping information in the filter file to ensure that you chop out any bad data. (See Step 3 in the Reduction of Spectral Data recipe.)

Calendar DayMission DayObsid(s) AffectedData Mode(s) AffectedComments
1996Jan2475310354-01-03-00 missing GoodXenon-
1996Jan2975810354-01-08-00
10297-01-01-00
-Zero length GTI tables
1996Feb0476410401-01-02-00 SB_125US_0_49_1S partition overflowed by 23406 events
1996Feb0676610401-01-01-00 SB_125US_0_49_1S-
1996Feb0876810065-01-01-00 E_125US_64M_50_1S
F_125US_0_24_249_16S
Standard modes
commanding errors
1996Feb1977910059-02-06-00 B_500US_1M_0_87_H EA1 was idled through a RT command
1996Mar0679510320-01-01-00(0) both HEXTE Cluster B(1) modesHEXTE cluster B(1) detector 2 was safed
1996Apr1883810202-02-01-00 E_31US_16M_0_8Sevent mode overflow
1996Apr1983910202-02-02-00 E_31US_16M_0_8Sditto
1996May0385310213-01-02-00 all PCA GO science modes scheduling problem
1996Jul2893910142-01-01-001 PCA GO science modesrecorder overwrite
1996Jul3194210192-02-01-011HEXTE Cl A(0) science HEXTE Cluster A(0) remained in IDLE mode
1996Aug0995110182-01-01-01 HEXTE Cl A(0) scienceditto
1996Sep2299510999-01-00-00 all data safehold
1996Sep2399610265-01-22-01-galactic ridge scans with no good time
1996Sep2499710265-01-25-01
10265-01-26-01
10265-01-27-01
-no good time
1996Sep2599810265-01-28-01
10265-01-19-03
-no good time
1996Sep27100010265-01-20-03
10266-01-07-00
- occulted, no good time
1996Sep28100110266-01-09-00- occulted, no good time
1996Oct01100410425-01-01-00E_4US_16B_0_1S EA1 turned off
1996Oct06100910321-03-01-03S-scan during SAA, no good time
1996Oct18102110040-01-02-000HEXTE Cl A(0) modes HEXTE cluster A(0) detector 1 went out
1996Nov01103520801-05-01-00
10311-01-08-00
all science modes out_saa dropped, EAs & HEXTE recording zeros, GTIs incorrect
1996Nov04103810090-01-01-000
10090-01-01-001
E_16US_64M_0_8S EA1 going on and off
1996Nov05103910090-01-01-00E_16US_64M_0_8SEA1 going on and off
1996Nov09104310088-01-07-01all GO EA modesdoubled partitions; day boundary problem
1996Nov16105010061-02-03-00 1 ks of F_31US_0_24_249_16S EA3 failed to come on as scheduled
1996Nov17105110223-01-03-000 3 ks of E_125US_64M_0_1S continuing EA3 problems
""10200-01-26-00 SB_250US_14_249_2S scheduling problem related to no slew modes
1996Nov26106020069-01-04-00 GOODXENON2_2S EA7 scheduling problem
1996Nov26106220402-01-04-00 SB_125US_0_13_1S EA3 scheduling problem
1996Dec08107220188-01-01-00-ObsId is 8 seconds long and is all slew; no good time
1996Dec25108920146-05-02-00GoodXenon[12]_16sdoubled partitions; day boundary problem
1996Dec31109510088-01-08-04
10088-01-08-030
SB_125US_0_249_1S EA2 configurations adjusted at GO request
1997Jan05110010145-01-02-07 HEXTE science modes HEXTE data dropout
1997Jan24111920332-01-01-000 GOODXENON1_16S SEU at 1997:024:09:49:03 started EA1 running when PCA was idle.
1997Jan28112310085-01-01-10[0]all GO EA modesdoubled partitions; day boundary problem
1997Jan31112620801-01-04-00HEXTE science modescommanding problem
1997Feb17114320181-01-03-00 HEXTE science data dropout 17:18-17:23 commanding problem
1997Feb27115320109-01-09-00 all modes commanding "dead time between weeks"
1997Mar01115520104-01-01-004 HEXTE Cluster A (0) science left off after SAA
1997Mar07116120069-03-02-00 - incorrect index files due to processing glitch
1997Mar22117620033-01-08-00 HEXTE Cluster B's science mode HEXTE stuck in 'DIAGNOSTIC MODE'
1997Mar30118420316-02-28-00 both HEXTE science modesditto
1997Apr28121320321-10-02-00 cluster A(0) science ditto
1997May04121920033-01-22-00 HEXTE science modes ..again
1997May15123020402-01-27-00 HEXTE Cl A(0) science...and again
1997May22123720316-01-01-00 all modes lost 600 sscheduling glitch
1997May28124320018-01-02-00 both HEXTE science modes HEXTE left in diagnostic mode
1997May31124620018-01-04-00 HEXTE science modes the day that XTE stopped moving
1997Jun01124720510's-... safe hold
1997Jun02124820510's -... safe hold
1997Jun17126320146-03-08-00GOODXENON[12]_16S GRB hand edit
1997Jun19126520313-01-56-00 HEXTE archive modesDAP problem
1997Aug07131420310-01-01-08 all science datacommanding problem
1997Aug08131520310-01-02-000 HEXTE science modesscheduling problem
1997Sep06134420428-01-01-02
20428-01-01-03
GOODXENON[12]_16S safehold...
1997Sep22136020083-01-02-001
20083-01-02-00
all data..continued, no ASC telemetry, and buffer overflow of other telemetry
1997Oct03137120187-02-03-00 all PCA modescommanding problems
1997Nov06140520429-01-07-00GOODXENON[12]_16S TOO, EAs 1 and 2 configuration changes mid-obs
1997Nov25142420003-01-52-00 PCA science modes replan, occult not in Obscat or GTIs
1997Nov27142620155-01-01-06
20035-01-03-07
PCA science modesditto
1998Feb06149730062-03-01-02 E_16US_64M_24_8S overflowed buffer
1998Feb08149930188-01-11-00 E_16US_64M_24_8S overflowed buffer
1998Feb12150330178-02-01-01 all PCA science modes direct maneuver, modes off for previously scheduled occult
1998Feb21151220266-01-35-06S- no good time, occulted section of scan
1998Feb22151330405-01-01-031all GO EA modesdoubled partitions; day boundary problem
1998Mar07152630415-02-01-02S- zero good time listed
1998Apr01155130171-01-01-00 PCA GO modes lost 1.6 ks occult from previous target still in DAP after direct slew
1998Apr06155630703-01-14-00 all PCA GO modes lost .8 ks3scheduling problem
""30256-01-23-00 both HEXTE GO modes lost 0.8 ks-
1998May06158630411-01-11-06S- good times listed as zero, mixed scan/grid/pointed observations
1998Jul03164430084-01-08-00SB_125US_0_17_1S and
SB_125US_18_35_1S missing 2.5 ks
GRB replan
1998Aug03167530413-08-01-01S- no good time; in the middle was an attitude corrcetion, obscat incorrectly designates the whole observation a scan
1998Aug10168230016-01-01-02 all PCA GO modes lost 1.3 ks unscheduled direct slew, previously scheduled occult
1998Sep07171030188-06-02-00all PCA GO modes lost .7 ks unscheduled direct slew, previously scheduled occult
1998Sep211724 30191-01-05-00
30191-01-06-00
30801-06-23-04
30157-01-41-00
30191-01-07-00
30703-01-34-00
miscellaneous PCA science data lossesrecorder overwrite
1998Oct16174930053-01-02-021.3 ks of HEXTE archive mode SEU, safehold...
1998Oct17-91750-230431-01-01-00[01-9]all or most science data lost...continued
1998Oct22175530801-03-13-02 GOODXENON[12]_16S lost 0.5 ksGRB chase
1998Nov12177630095-01-01-05GOODXENON2_2S lost 2 ks data overwrite
1998Nov18178230433-01-02-00
30040-03-02-010
GoodXenon ~ 3.5 ks
all GO modes ~1 ks
-
1998Dec01179530019-01-01-00HEXTE Archive ~ 1.7 ks-
1998Dec06180030213-1[01]-02-00- good time listed as zero, odd slews
1998Dec09180330213-05-03-00- good time listed as zero
1998Dec10180430213-0[67]-03-00- good time listed as zero
1998Dec15 -
1999Jan07
1809-
1832
30232-02-01-0{0,00,01,03,08}
30053-01-03-{000-02}
40191-01-{01-08,10}-00
40030-01-0{6-15}-00
-slew to ASM Anti-Sun position during occult
1998Dec25-
1999Jan07
1819-3240191-01-[01-10]-00-observations offset by 2.2 arcmin from requested position
1999Jan01182640174-06-01-00-observation offset by 2.8 arcmin from requested position
1999Jan01-151826-4040151-02-0[1-3]-00-observation offset by 3.7 arcmin from requested position
1999Jan02-131827-3840174-01-0[1-4]-00-observations offset by 2.7 arcmin from requested position
1999Jan{05,12}183[07]40177-02-0[12]-00-observations offset by 2.8 arcmin from requested position
1999Jan06183140501-01-01-00
40020-01-02-00{0}
miscellaneous sciencerecorder overwrite
1999Mar14-171898-1902 40176-01-03-08
40411-01-12-00
40099-01-05-02
40099-01-05-03
40017-01-04-00
40407-01-03-00
40223-01-18-00R
39% EA5
50-85% EAs1,2,3
70% EA1
30-50% EAs 1,2,3,7
30% EA1, 50% EA3
50% HXT science
30% HXT archive
Missing data due to bit errors in corrupted memory block; See Big Events
(% data missing shown)
1999Mar17190140401-01-58-01all PCA modes PCUs experience a gain setting switch 3200 seconds after the start of this obsid at 03:05 UTC . See Big Events
1999Mar23-251907-9 40051-05-0[34]-00
40411-01-2[12]-00
40037-01-08-00
40413-01-02-00
40401-01-64-00
40801-06-12-05
-PCUs 3 and 4 at wrong gain setting. See Big Events
1999Mar17,311901,191540805-01-02-00
40805-01-03-00
all PCA modes PCA high voltage settings change mid-observations
1999Jun15199140030-03-01-01-ObsId entirely in SAA; GTI extensions incorrect.
1999Jul01200840009-01-01-01missing PCA Std1 and event modes -
1999Jul05201140009-01-01-01HEXTE archive-
1999Jul30203640703-01-23-02 missing PCA data until 00:52:00; missing HEXTE data throughoutInstruments were not commanded back on after out-SAA. PCA was corrected; HEXTE was not
1999Jul302036 40418-01-31-00
40414-01-08-00
40139-01-27-00
40801-01-31-93
40139-01-27-01
40135-01-51-[01-11S]
HEXTE data HEXTE remained off until after the out-SAA at around 07:20:03
2000Jan242214 40151-02-43-00
40152-01-92-00
40152-02-92-00
missing PCU0 housekeeping data other PCUs housekeeping data unaffected
2000Sept032437 50011-01-10-00 PCA data modes HK, GoodXenon modes and Std2 only
2002Mar122992 70154-01-05-01missing PCA Good Xenon Data for 130 seconds There are three GoodXenon files in the PCA directory. Missing one of the 'pairs'.
2002May15305670014-01-02-00,03HEXTE event modeshigh HEXTE countrate caused repeated overflows of event mode, and about 30% loss of data. Archive modes are not affected.
2003Feb43321 70085-01-08-00 PCA & HEXTE Data satellite in SAA for entire observation, so no data collected; good time listed is faked, for processing reasons. Obs. 70085-01-08-000 on previous day contains full observation of this source.
2003Mar29337480413-01-01-00 TLA_1S_10_249_1S_5000_F
CB_125US_1M_0_249_H
GOODXENON1_2S
GOODXENON2_2S
approx. 2100 sec of data lost in each mode, result of rapid reschedule to catch this source (ie., direct slew of satellite)
2003Mar30337580413-01-02-00 TLA_1S_10_249_1S_5000_F
CB_125US_1M_0_249_H
GOODXENON1_2S
GOODXENON2_2S
536 sec of data lost in each mode, result of rapid reschedule to catch this source (ie., direct slew of satellite)
2003Mar31-
2003Apr1
3376-
3377
70123-01-09-01G
80138-01-02-00G
80801-01-20-45G
70142-01-96-00G
70082-03-24-00G
70078-03-12-[01S-05S]
70142-04-52-10G
80154-05-06-00G
80154-02-17-00G
80801-06-05-06G
80173-01-24-00G
70164-01-73-10G
70153-02-06-00G
80001-01-32-00G
80135-01-02-20G
80045-02-02-02G
80106-01-06-[01S-22S]
no HEXTE Cluster A data Single Event Upset caused loss of HEXTE Cluster-A data from 17:21 (UT) on Mar. 31 through 18:25 on Apr. 1.
2003Apr13377 80145-01-06-04
80801-01-20-38
80406-01-04-04
HEXTE Cluster-A Cluster-A not in "normal" science mode - no rocking, other peculiarities (result of SEU mentioned in previous entry).
2003Jun213458 80418-01-03-02 TLA_1S_10_249_1S_2000_F 3489 seconds of data lost, this mode only (due to rapid scheduling of this TOO)


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This page is maintained by the RXTE GOF and was last modified on Thursday, 17-Aug-2006 16:49:22 EDT.