This document defines the catalog entries describing
the XMM Optical Monitor Data Archive as delivered to MAST by HEASARC.
Most of the documentation below was obtained from the
Data Archive Center.
XMM was launched by ESA on December 10th, 1999 and
carries two distinct types of telescope: three Wolter type-1 X-ray
telescopes with different X-ray detectors in their foci,
and a 30-cm optical/UV telescope with a
microchannel-plate pre-amplified CCD detector in its focal plane.
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The nominal right ascension of the XMM-Newton pointing, in the requested equinox. Notice that the originating table contained the position in equinox J2000 with RA given to a precision of 0.01 seconds of time. Range: 0 to 360 deg
The nominal declination of the XMM-Newton pointing, in the requested equinox. Notice that the originating table contained the position in equinox J2000 with declination given to a precision of 0.1 arcseconds. Range: -90 to +90 deg
This flag is set to 'Y' or 'N' to indicate whether or not the dataset is available in the HEASARC Archive. Some XMM-Newton observations for which the archived data has become publically available as indicated by the public_date value being in the past implying that the proprietary period has expired, are not currently available at the HEASARC. These datasets in most cases are available at the ESA XMM-Newton Data Archive at http://xmm.vilspa.esa.es/ Y or N
The estimated duration for the observation in seconds. This is derived by checking for the time spent with the filter wheel (the MOS1 camera is taken as the reference) within the time window planned for the observation. Range: 0 to 133406 sec
The planned duration for the observation, in seconds. This is the planned on-target time and includes the time required for instrument setup, which means that the actual 'science' time available will typically be lower than this. Range: 0 to 142097 sec
A broard taget category assigned by PI. Currently 7 categories are defined (see target class field for more). AGNs, QSOs and BL-Lacs
Cluster of Galaxies and Superclusters
Galaxies and Groups of Galaxies
Stars, White Dwarf and Solar System
Supernovae, Supernova Remnants, Diffuse Emission
White Dwarf Binaries, Neutron Star Binaries
X-ray Background and Surveys
The XMM-Newton revolution number in which the observation occurred, i.e., the number of 48-hour orbits which had elapsed since the launch of XMM-Newton up to the date of the observation. Range: 0 to more than 1200