EUVEBSL Catalog
This database table contains a detailed list of verified bright EUVE sources
detected during the survey phase of the EUVE mission (calibration targets are
also included). Two distinct surveys, the all-sky and deep surveys, were
conducted by the four EUVE telescopes during the first six months of the
mission. Further documentation is available through the HEASARC.
EUVECAT2 Catalog
This is the 2nd Catalog of EUV objects detected by the Extreme Ultraviolet
Explorer (EUVE) and published by Bowyer et al. in 1996 (ApJS, 102, 129).
The data include (i) all-sky survey detections from the initial 6-months
scanner survey phase, (ii) additional scanner detections made later during
specially programmed observations designed to fill in low-exposure sky areas
of the initial survey, (iii) sources detected with deep-survey telescope
observations along the ecliptic plane, (iv) objects detected by the scanner
telescopes during targeted spectroscopy observations, and (v) other
observations. Plausible optical, X-ray, radio, and/or UV identifications are
available for about 65% of the EUV sources.
The EUVE all-sky survey detections (indicated by detect_mode
= EASS in this catalog) comprise 514 detected EUV-emitting objects,
the deep-survey detections (indicated by detect_mode = DS in this catalog)
comprise 35 detected objects, and the sources detected during other phases
of the mission (indicated by detect_mode = OTHER in this database) comprise
188 detected objects. Notice that 3 deep survey objects were also detected in
the all-sky survey. Most of the sources detected in the other phases
principally comprise those detected in deep exposures with the scanner
telescopes as part of the Right Angle Program through December 24, 1994, or
in long exposures with the deep survey instrument. Because these latter
objects were observed with a variety of instruments and exposure strategies,
the flux limits and detection thresholds vary over a wide range, and the
Bowyer et al. reference should be consulted for more details.
Some of the EUV sources have alternative cross-identifications at other
wavelengths suggested for them. Notice that, in such cases, we have
followed the original catalog and listed separate entries for each
alternate identification. For example, the EUV-emitting object EUVE J1147+202
is listed twice, once with the suggested ID of DQ Leo, and a second time
with the suggested ID of BD +21 2357. Thus, there are 801 entries in this
database corresponding to 737 unique EUV sources.
EUVEMASTER Catalog
This catalog of the EUVE Science Archive has been constructed based on
information provided by personnel of the Center for Extreme-Ultraviolet
Astrophysics (CEA), and is made available in the current EUVEMASTER database
table. Most of the information in the catalog is also in the headers of the
FITS files. The HEASARC now has nearly all of the 1378 pointed EUVE Deep
Survey/Spectrometer (DS/S) datasets that were processed by CEA until its
closing in March 2001. There are a small number of observations that were made
in the year 2000 for which the HEASARC does not currently have the
corresponding datasets. Notice that this catalog does not contain entries
corresponding to EUVE observations in scan mode or where the files received
by the HEASARC were not of the normal image or events type.
EUVERAP1 Catalog
This table contains the detections of 114 extreme-ultraviolet (EUV; 58 - 740
Angstrom) sources, of which 99 are new serendipitous sources, based on
observations covering approximately 8% of the sky which were made with the
imaging telescopes on board the Extreme Ultraviolet Explorer (EUVE) during
the Right Angle Program (RAP). These data were obtained using the survey
scanners and the Deep Survey instrument during the first year of the
spectroscopic guest observer phase of the mission, from January 1993 to
January 1994. The data set consists of 162 discrete pointings whose exposure
times are typically two orders of magnitude longer than the average exposure
times during the EUVE all-sky survey. Based on these results, the authors
expect that EUVE will serendipitously detect approximately 100 new EUV
sources per year, or about one new EUV source per 10 square degrees, during
the guest observer phase of the EUVE mission. New EUVE sources of note
include one B star and three extragalactic objects. The B star (HR 2875, EUVE
J0729 - 38.7) is detected in both the Lexan/B (approximately 100 A) and
Al/Ti/C (approximately 200 A) bandpasses, and the detection is shown not to
be a result of UV leaks. The authors suggest that they are detecting EUV
and/or soft x rays from a companion to the B star. Three sources, EUVE
J2132+10.1, EUVE J2343-14.9, and EUVE J2359-30.6 are identified as the active
galactic nuclei MKN 1513, MS2340.9-1511, and 1H2354-315, respectively.
Some of the EUV sources have two or more alternative source identifications
suggested for them in this catalog. Notice that, in such cases, the HEASARC
has followed the structure of the original catalog as given in Table 2 of the
reference paper, and lists separate entries for these alternative
identifications. Thus, there are 152 entries in this database table,
corresponding to 114 EUV sources.
The characteristics of the 6 EUVE filters are listed in Table 1 of the
reference paper (q.v.).
EUVERAP2 Catalog
The Second Extreme Ultraviolet Explorer (EUVE) Right Angle Program
(RAP) Catalog contains information on the detection of 235 extreme ultraviolet
(EUV) sources, of which 169 are new detections, using the EUVE's RAP data.
This catalog included observations made since the first EUVE RAP catalog
(1994 January) and covered 17% of the sky. The EUVE RAP used the all-sky survey
telescopes (also known as "scanners"), which were mounted at right angles to
the Deep Survey and Spectrometer instruments, to obtain photometric data in
four wavelength bands centered at 100 Angstroms (Lexan/B), 200 A (Al/Ti/C),
400 A (Ti/Sb/Al or Dagwood), and 550 A (Sn/SiO). The EUVE RAP2 Catalog contains
source count rates and probable source identifications from the available
catalogs and literature. The source distribution is similar to previous EUV
catalogs with 2% early-type stars, 45% late-type stars, 8% white dwarfs,
6% extragalactic objects, 24% with no firm classification, and 15% with no
optical identification.
EUVERAP3 Catalog
The Third Extreme Ultraviolet Explorer (EUVE) Right Angle Program (RAP)
Catalog contains information on the detection of 76 extreme ultraviolet (EUV)
sources, of which 63 are new detections, using the EUVE's RAP data. This
catalog concentrates on observations made in the last years of the RAP, 1999
and 2000, with a sky coverage of 7% of the sky. The EUVE RAP used the all-sky
survey telescopes (also known as "scanners"), which were mounted at right
angles to the Deep Survey and Spectrometer instruments, to obtain photometric
data in four wavelength bands centered at 100 Angstroms (Lexan/Boron or
"Lexan"), 200 A (Al/Ti/C or "Al/C"), 400 A (Ti/Sb/Al or "Dagwood"), and 600 A
(Sn/SiO or "Tin"). The EUVE RAP3 Catalog contains source count rates and
probable source identifications from the available catalogs and literature.
The source distribution is similar to previous EUV catalogs with 5 (8%)
early-type stars, 23 (37%) late-type stars, 1 (2%) white dwarf, 1 (2%)
cataclysmic variable, 4 (6%) extragalactic objects, 22 (35%) with no firm
classification, and 7 (11%) with no optical identification.
This final RAP Catalog, combined with the EUVE All-Sky Survey, the Lampton
et al. (1997, ApJS, 108, 545) Faint EUV Source List, and previous RAP
Catalogs, brings the total number of EUV sources to nearly 1200.
EUVEXRTCAT Catalog
The All-Sky Catalog of Faint Extreme-Ultraviolet (EUV) Sources
is a list of 534 objects detected jointly in the Extreme Ultraviolet
Explorer (EUVE) (100 Angstrom (AA) band) All-Sky Survey and in the ROSAT X-ray
Telescope (XRT) (0.25 keV band) All-Sky Survey. The joint selection criterion
within a 1.5 arcminute positional tolerance permitted the use of a low count
rate threshold in each survey. This low threshold was roughly 60% of the
threshold used in the previous EUVE all-sky surveys, and 166 of the objects
listed in this table were new EUV sources, appearing neither in the Second
EUVE Source Catalog nor in the ROSAT Wide Field Camera Second Catalog.
Preliminary identifications are offered for 105 of the 166 sources not
previously reported in any EUV catalog: by far the most numerous
(81) of the identifications are late-type (F-M) stars, while 18 are other
stellar types, only 5 are white dwarfs, and none are extragalactic. The
paucity of WDs and extragalactic objects may be explained by a strong horizon
effect wherein interstellar absorption strongly limits the effective
new-source search volume, and, thereby, selectively favors low-luminosity
nearby sources over more luminous but distant objects. Notice that, with the
adopted 1.5 arcminute acceptance criterion, about 50 spurious detections
are expected.
