VizieR

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VizieR

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IX/25/ipcihut Einstein Observatory IPC Parameters (HEAO-2, 1978-1981)
Component Huts for IPC Sequences (13265 rows)
  recno=5228
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ColumnValue  Explain   (UCD)
_RAJ200018 42 38.17 "h:m:s" Right ascension (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEJ2000+55 32 20.3 "d:m:s" Declination (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_RAB195018 41 40.00 "h:m:s" Right ascension (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEB1950+55 29 17.0 "d:m:s" Declination (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_Glon084.93897 deg Galactic longitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lon)
_Glat+23.28466 deg Galactic latitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lat)
5228recno 5228  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

IPCseq 4960  IPC Sequence Number (Note 1)   (meta.id;meta.main)
fieldno 5  IPC hut number relative to field (Note 1)   (meta.id)
MinFno 94573943  Minor frame number (Note 2)   (obs.field)
MajFno 738858  Absolute hut number (minor frame / 128) (Note 2)   (obs.field)
RAB195018 41 40 "h:m:s" (i) Right Ascension (B1950) (pos.eq.ra;meta.main)
DEB1950+55 29 17 "d:m:s" (i) Declination (B1950) (pos.eq.dec;meta.main)
hutroll 2.020 rad Hut - nominal roll angle (Note 3)   (instr.param)
aspyoff 1.020  Aspect Y offset in pixels (Note 4)   (instr.saturation)
aspzoff 0.594  Aspect Z offset in pixels (Note 4)   (instr.saturation)
asprot-7.5038e-04 rad Aspect rotation (Note 4)   (instr.saturation)
livetime1644.941 s Livetime (Note 5)   (time.duration;obs.exposure)
avgbal18.67  Time-averaged BAL (Note 6)   (phot.flux.density;em.IR.4-8um)
ustartim 8.4984200e+09 us Start time (Note 7)   (time.epoch)
astartday 667  Absolute start day (offset from 1978.0) (Note 7)   (time.epoch)
start1979-10-29 "Y:M:D" Start year (Note 8)   (time.start)
starttime 8498419 ms Start time (Note 8)   (time.epoch)
stop1979-10-29 "Y:M:D" Stop year (Note 8)   (time.end)
stoptime10259700 ms Stop time (Note 8)   (time.epoch)

_RA.icrs18 42 38 "h:m:s" (i) Right ascension (ICRS) (computed by VizieR, not part of the original data) (pos.eq.ra)
_DE.icrs+55 32 20 "d:m:s" (i) Declination (ICRS) (computed by VizieR, not part of the original data) (pos.eq.dec)
  
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