EUVEMASTER - EUVE Archive and Observation Log
Name Observed Date Archive File -----------------+-----------------------+-------------------------------- EUVE J0932 26.9 2000-03-14 03:02:57 euve_j0932_26_9__0003140302N EUVE J0932 26.9 2000-03-18 17:11:17 euve_j0932_26_9__0003181711N Virgo Positive 2000-04-05 00:02:08 virgo_positive__0004050002N Virgo Positive 2000-04-08 18:06:51 virgo_positive__0004081806N Virgo Positive 2000-04-13 23:20:00 virgo_positive__0004132320N Virgo Positive 2000-04-19 15:27:49 virgo_positive__0004191527N Virgo Negative 2000-04-19 23:17:06 virgo_negative__0004192317N ACO 2149 2000-06-26 08:48:59 aco_2149__0006260848N EUVE J0006 29.0 2000-06-26 22:44:00 euve_j0006_29_0__0006262244N EUVE J0006 29.0 2000-07-04 10:05:57 euve_j0006_29_0__0007041005N EUVE J0006 29.0 2000-07-08 03:46:56 euve_j0006_29_0__0007080346N AR Lac 2000-09-04 05:18:59 ar_lac__0009040518N AR Lac 2000-09-08 10:44:42 ar_lac__0009081044N EUVE J0613-23.9 2000-11-06 03:49:27 euve_j0613-23_9__0011060349N (missing image file only)In addition to the above missing (or partially missing) data sets, there are also two Science Archive FITS data sets for what appears to be the same observation: EUVE J0356-366 and 2EUVE J0356-36.6. Current speculation is that the pointing position may have been updated and the data was reprocessed at some point.
The target name; this is the official name under which the target was processed for the EUVE Archive. It is not necessarily the name under which the target was originally proposed or observed. A single name has been consistently used throughout the archive for targets which were observed more than once. In some cases, the target name listed in the file itself is an alternate name for the object.
The right ascension in the default equinox. Data originated in J2000 coordinates, notice and is processed using standard algorithms if another equinox is selected. The original J2000 coordinates were used as the coordinates of the source when CEA processed the data. However, these are not necessarily the same as the coordinates that were used to point the spacecraft during the actual observation. They are typically either taken from Simbad (with proper motions applied) or were supplied by the Guest Observer. CEA used the same coordinates throughout the EUVE archive for multiple observations of the same source, except in certain special cases.
The declination in the default equinox. Data originated in J2000 coordinates, notice and is processed using standard algorithms if another equinox is selected. The original J2000 coordinates were used as the coordinates of the source when CEA processed the data. However, these are not necessarily the same as the coordinates that were used to point the spacecraft during the actual observation. They are typically either taken from Simbad (with proper motions applied) or were supplied by the Guest Observer. CEA used the same coordinates throughout the EUVE archive for multiple observations of the same source, except in certain special cases.
The Galactic longitude of the object.
The Galactic latitude of the object.
This is the GMT (UT) time, to the nearest second, of the start of the observation. The target name and observation date together serve to uniquely identify each EUVE observation.
This is either the word "night" or "day" indicating which part of the observation is being cataloged. Some observations will have both parts, others will only have a night part. In general, only 'night' data have been archived for most sources.
This is the median exposure for this observation, in seconds. There are four EUVE detectors which normally collect data simultaneously during an observation. Each detector will have a different exposure time. In this field the median of the exposures of the individual detectors is listed, in units of kiloseconds, and rounded off to the nearest kilosecond. Note that sometimes one detector can be way off from the others and skew this number, or an observation can be very short producing an exposure time of zero. For the true exposure times, the user would need to obtain the actual data files for an observation, and look in the headers of the images.fit extensions. This parameter was given with a precision of kiloseconds in the original, as-published table.
The name of the Principal Investigator (PI) of the proposal which was associated with this observation in the CEA database. This is not always a very meaningful field, because many times multiple proposals (and PIs) were given simultaneous data rights the to the target in the same observing cycle. In that case, only one of the PIs is listed here. The observer is listed as "EUVE" for targets which were scheduled as calibration targets. However, for most calibration targets, there was also a PI to whom the data was for an interval of time proprietary; unfortunately, this database does not contain the PI names for such calibration targets.
The sum of the sizes of the events and image FITS files for the particular observation, in their original formats, in kilobytes. The events files normally consume a lot more space than the image files. Also notice that, since the HEASARC stores these files in gzipped format, this parameter overestimates by a factor of 1.5-2 their actual sizes in the HEASARC data archive.
A broad category for the target; values include:
wd white dwarf late late-type star early early-type star cv cataclysmic variable ex extragalactic ss solar system pulsar pulsar pn planetary nebula noid unidentified lmxb low-mass X-ray binary snr supernova remnant grb gamma-ray burster other none of the above
This is the spectral type, for stars and white dwarfs, or a sub-classification for some other categories. It is left blank where not applicable or known.
The old ID number that the target was assigned in the now obsolete EUVE spectral browser and archive. Notice that there is not a one-to-one correspondence between the old archive and the current one, so that some targets have more than one ID number associated with them, and other IDs are used by multiple targets. The old ID might be of use for historical purposes or for users who know the old ID of a target that they want. EUVE stopped assigning ID numbers to publicly released targets as of the Feb. 1, 1998 release.
The date on which this observation will become public. If this field is blank, the target is already public. If there is a date present, this target is still proprietary to its Guest Observer and should not be made public until the indicated date or thereabouts. Targets observed in Cycles 1-4 of the EUVE Guest Observer program have one year proprietary periods. In Cycle 5 (which began in 1997) and later cycles the period is six months. The period begins when CEA delivers the data, not when it was observed, and exceptions are sometimes made if there was a problem with the data delivery, etc., so the public dates cannot be inferred from the data files themselves. Also, some EUVE observations are done in parts over an extended period of time; in such cases, the proprietary period is determined from the delivery date of the last part to the PI.
Root of the file name under which the data can be retrieved from the archive system. This information is derived from the target name and observation date and time. Interested users might note the Archive_File values for the observations in which they are interested, and then download the data sets using anonymous FTP to ftp://legacy.gsfc.nasa.gov/euve/data/fits/.
Browse classification, derived from the spect_type parameter in conjunction with the object_type parameter.