CMA Catalog
This database table contains the results of the sources detected from the two
EXOSAT LE telescopes. Each telescope had a channel multiplier array, CMA,
detector in the focal plane. The CMA/telescope combination covered the
0.05-2.0 keV energy range with a field of view of 2 degrees and an on-axis
angular resolution of 20 arcseconds (HEW). The detectors had no intrinsic
spectral capabilities; however, different filters were used to make broad
band measurements. The most commonly used were thin Lexan (no. 7),
Aluminum-Parylene (no. 6) and Boron (no. 8).
An image was generated for each observation using a particular filter. A
detection program was used to generate one database entry per source detected
above a particular threshold. This catalog contains the list of detected
sources, details about those detections, plus the names of the files
containing the associated image and lightcurves. Since many objects were
observed many times, there are multiple entries per object.
This database table contains the complete list of detections and has not been
screened for quality. Please refer to the
CMASCREEN database table for a version
which has been screened for quality.
CMAIMAGE Catalog
This database table contains the images from two EXOSAT LE telescopes with
the channel multiplier array (CMA) detectors in the focal plane. The
CMA/telescope combination covers the 0.05-2.5 keV energy range with a field
of view of 2 degrees and an on-axis angular resolution of 24 arc seconds
(HEW). The detectors had no intrinsic spectral capabilities; however,
different filters were used to make broad band measurements. The most
commonly used were Thin Lexan (number 7), Aluminum-Parylene (number 6) and
Boron (number 8). An image was generated for each filter used during an
observation.
CMASCREEN Catalog
This database table contains the results of the sources detected from the two
EXOSAT LE telescopes. Each telescope had a channel multiplier array, CMA,
detector in the focal plane. The CMA/telescope combination covered the
0.05-2.0 keV energy range with a field of view of 2 degrees and an on-axis
angular resolution of 20 arcseconds (HEW). The detectors had no intrinsic
spectral capabilities; however, different filters were used to make broad
band measurements. The most commonly used were thin Lexan (no. 7),
Aluminum-Parylene (no. 6) and Boron (no. 8).
An image was generated for each observation using a particular filter. A
detection program was used to generate one database entry per source detected
above a particular threshold. This catalog contains the list of detected
sources, details about those detections, plus the names of the files
containing the associated image and lightcurves. Since many objects were
observed many times, there are multiple entries per object.
The list of detections in this database table has been screened for quality.
Only sources with qflag_le >= 3 are present. Please refer to the
CMA database table for the complete, unscreened
list of detections.
EXMS Catalog
This is the first online version of the EXMS catalog. It contains
information on the 1210 sources detected by EXOSAT during slew manoevers
between 1983 and 1986. Each detection was obtained by searching for excesses
above the background level in the light curve, fitted with the expected
triangular profile due to the source passing from one side of
the collimator to the other. These light curves are available for
inspection from the xray account at ESTEC/ESA
(telnet :://xray@exosat.estec.esa.nl).
The detection time, raw 1-8 keV count rate and position (based on the
centroid of the uncertainty region) are given for all 1210 entries.
80% of entries have proposed single identifications, obtained by
cross-correlation of the uncertainty region against other catalogs. For
these sources, the count rates are also supplied after correction for
collimator efficiency, normalised to counts/sec/half, where "half" refers
to one half of the ME detector array. This ensures consistency with the
entries in the ME database. Coordinates of the proposed counterpart are
also given, together with object type. The remaining sources consist of
cases where more than one plausible candidate lay within the uncertainty
region or where no candidate could be found. For these cases, only
raw count rates are supplied.
EXOFOT Catalog
The EXOFOT database table contains the log of the EXOSAT final observation
tapes (FOTs). It is meant to help locate the desired EXOSAT data file within
the HEASARC data archive. The table itself contains a minimal number of
parameters regarding the observation. This information corresponds to the
first 255 bytes which label the FOT. Those parameters are target name,
experiment, and start and stop time. The other parameters in the table are
more related to the organization of the archive.
EXOGPS Catalog
This catalog is based on information contained in Warwick et al (1988), MNRAS,
232, 551.
The distribution of 2-6 keV x-ray emission in the galactic plane in the first
and fourth galactic quadrants has been measured in a series of scanning
observations with the medium-energy progportional counters on EXOSAT. The
results are presented as contour maps and in the form of a catalogue of 70
discrete sources.
Additional references can be found under the reference parameter. Additional
information can be obtained upon request from the HEASARC.
EXOHGLS Catalog
A survey of serendipitous source performed in the very soft X-ray band
(0.05-2.0 keV) using the EXOSAT imaging telescopes is presented. The survey
covers 783 square degrees of high galactic latitude sky and includes 210
serendipitous sources which define a complete (flux-limited) sample. An
extensive program of optical and radio observatories together with
cross-correlations with catalogs of known objects lead to the identification
of 200 of the 210 detected sources. The 10 remaining objects have been
preliminarily classified on the basis of their X-ray to optical flux ratios,
thus making the sample essentially fully identified. Twenty-three additional
serendipitous sources which did not satisfy the requirements for inclusion in
the complete sample were also identified during the optical observations
program. The complete sample has been used to study the logN-logS relation and
the average spectral slope of AGN. It is found that the logN-logS slope is
consistent with that of the Einstein Extended Medium Sensitivity Survey (EMSS)
and with the "Euclidean" value of 1.5. The normalization of the logN-logS
is a strong function of the assumed spectral slope of AGN. Consistency with
the results of the EMSS implies that the average (energy) slope of
extragalactic sources in the soft X-ray band is very steep (alpha ~ 1.5). An
analysis of the association between AGN detection and Galactic NH also shows
that alpha is steep and inconsistent with the canonical value of 0.7. The
survey was particularly successful in detecting nearby Galactic soft X-ray
emitters and includes a significantly higher percentage of stars than the
Einstein EMSS, five White Dwarfs, and three previously unknown AM Her type
systems.
The sample of sources in this catalog has been selected from the CMA
database, which it has been generated using a standard processing
on the LE data.
The source detection algorithm used a sliding cell method. The size of the
search cell is such as to maximize the sensitivity across the field of view.
For more information about the LE processing see the documentation in the
CMA database.
EXOLOG Catalog
This database table contains the EXOSAT observation log. This is a complete
list of all EXOSAT observations, observing modes, and principal investigators.
The log can be used to find out which targets were observed by EXOSAT, who
observed them, and the current state of the data analysis.
EXOMASTER Catalog
The EXOMASTER database contains the EXOSAT observation log. This is a
complete list of all EXOSAT observations, observing modes, and principal
investigators. The log can be used to find out which targets were observed by
EXOSAT, who observed them and the observation configuration. In addition this
database can also be used to check the availability of the FOT (Final
Observation Tape) files (the original raw data files) and their reformatted
FITS files.
EXOPUBS Catalog
This database table contains information about all EXOSAT publications in
refereed journals that make use of EXOSAT data. Each entry is unique
for every combination of publication and X-ray source. For example, a paper
which discusses five X-ray sources will have generated five distinct entries in
the database, each referring to a different X-ray source.
Unlike EXOLOG, the EXOPUBS database also includes entries for serendipitous
sources. In addition to standard database parameters such as source name,
coordinates, object class, etc., the EXOPUBS includes the full reference
(authors, journal, volume, page, year) and title of each publication.
Note the information is not complete after the year 1991.
GS Catalog
The results and data products from the EXOSAT GSPC. Only sources with ME count
rates of at least 5 ct/s/half are included.
LE Catalog
This database table contains results from the LE telescope for only the central
6 arc-minutes. It is the same as the CMA database in every other respect.
ME Catalog
The EXOSAT Medium Energy experiment (ME) was an array of eight proportional
counters with a total geometric area of 1600 cm^2. The field of view was
square and 0.75 degrees x 0.75 degrees FWHM on each side. Each proportional
counter consisted of an argon chamber on top of a xenon chamber separated by a
1.5 mm beryllium window. The fractional energy resolution, dE/E, was
21(E/6 keV)^-0.5 percent FWHM for the argon chambers. The output from each
chamber was pulse height analyzed into 128 channels with the argon chambers
sensitive from 1-20 keV and the xenon from 5-50 keV. To optimize the background
subtraction, each half of the detector array was alternately offset to a
source-free region of sky to monitor the particle background. Only results from
the argon detectors are included in the EXOSAT ME database.
The high count rates given by the ME required OBC (on board computer)
programs to compress the data prior to their being telemetered. Depending on
the objective of the observation the OBC programs traded time resolution
against spectral information. Depending on the telemetry load, and the
OBC programs running for the other two experiments, two or three ME
programs could be run simultaneously. The spectral orientated programs gave
spectra plus intensity profiles. The timing programs gave purely intensity
profile data with in some cases selectable channels. The highest time
resolution possible for a single selectable energy band was 0.2 ms.
The products available within this database has been created using the data
sampled by the spectral orientated OBC programs.
TGS Catalog
Spectra obtained using the EXOSAT transmission grating spectrometer, TGS.
There are two databases TGS and TGS2 as follows:
* TGS - the grating spectra averaged over the positive and negative orders
* TGS2 - the postive and negative orders kept separate
spectral fitting program. This is the default that most users will want to use.
Once a user has become more expert and wants to see, for example, if a subtle
feature is present in both halves of the grating spectra, the user can access
TGS2.
TGS2 Catalog
Spectra obtained using the EXOSAT transmission grating spectrometer, TGS.
There are two databases TGS and TGS2 as follows:
* TGS - the grating spectra averaged over the positive and negative orders
* TGS2 - the postive and negative orders kept separate
spectral fitting program. This is the default that most users will want to use.
Once a user has become more expert and want to see, for example, if a subtle
feature is present in both halves of the grating spectra, the user can access
TGS2.
