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=5225
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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)
5225recno 5225  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 2  IPC hut number relative to field (Note 1)   (meta.id)
MinFno 94485495  Minor frame number (Note 2)   (obs.field)
MajFno 738167  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 2.015 rad Hut - nominal roll angle (Note 3)   (instr.param)
aspyoff 1.939  Aspect Y offset in pixels (Note 4)   (instr.saturation)
aspzoff 0.102  Aspect Z offset in pixels (Note 4)   (instr.saturation)
asprot-9.1858e-04 rad Aspect rotation (Note 4)   (instr.saturation)
livetime 411.585 s Livetime (Note 5)   (time.duration;obs.exposure)
avgbal18.64  Time-averaged BAL (Note 6)   (phot.flux.density;em.IR.4-8um)
ustartim 6.6595060e+10 us Start time (Note 7)   (time.epoch)
astartday 666  Absolute start day (offset from 1978.0) (Note 7)   (time.epoch)
start1979-10-28 "Y:M:D" Start year (Note 8)   (time.start)
starttime66595059 ms Start time (Note 8)   (time.epoch)
stop1979-10-28 "Y:M:D" Stop year (Note 8)   (time.end)
stoptime68806899 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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