B/hst HST Archived Exposures Catalog (STScI, 2007)
The Archived Exposures Catalog from the HST (Hubble Space Telescope) STScI Team <Space Telescope Science Institute (1990-2007)>
ADC_Keywords: Observatory log Mission_Name: HST Description: This catalogue is a copy of the Archived Exposures Catalog (AEC) compiled from the Hubble Space Telescope Data Archive database, with an indication about the existence of scientific images or spectra. It provides a summary of completed HST science observations. This catalogue contains also WFPC2 observations stacked into associations which usage is recommended for a large fraction of the WFPC2 images (see details in the "WFPC2 Associations" section below). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file launch.dat 198 40008 First period from launch (1990Apr) to 1993Dec sm93.dat 198 46137 Period between 1993Dec to 1997Feb sm97.dat 198 271761 Since 1997Feb, until 2004May (Version 2005-Mar) sm02.dat 198 151599 Servicing Mission `02 (Version 2007-Dec) wfpc2.dat 180 15343 *HST WFPC2 associations, Version 1.
Note on wfpc2.dat: This table includes all WFPC2 observations released before 1 September 2002, combined into "associations" to give deeper, cosmic-ray free, and astrometrically corrected images; details about this new archive are given in the "WFPC2 Associations" section below.
See also: http://archive.stsci.edu/hst/index.html : Hubble Data Archive Home Page http://archive.stsci.edu/hst/aec.html : Archived Exposures Catalog Page http://cadcwww.hia.nrc.ca/wfpc2/ : CADC home page for the WFPC2 Associations http://cadcwww.hia.nrc.ca/hst/science_help.html : HST Help Page WFPC2 Associations: The Canadian Astronomical Data Center (CADC), the Space Telescope European Coordination Facility (ST-ECF) and the Multimission Archive at STScI (MAST) are pleased to make available combined images from the Wide Field Planetary Camera 2 of the Hubble Space Telescope. These combined images are the products of the basic registration and averaging of related sets of WFPC2 images, referred to as associations, that is usually performed by archival researchers after the retrieval of individual images. As of November 2002, over 15,000 combined images have been created from associations of nearly 50,000 individual WFPC2 images. This product of many person-years of development at CADC and ST-ECF form a set of high-quality astronomical data that should be useful for a wide range of investigations. They also provide better previews of a given field than the individual WFPC2 images. More details about the WFPC2 are given in the paper "Enhanced WFPC2 Associations" by Alberto Micol and Daniel Durand in the ST-ECF Newsletter of January 2002, p. 14. This initial release (November 8, 2002) of the WFPC2 Associations Science Products should be viewed as a "shared-risk" product release and users should consult the Data Quality assessement information that is available on the WFPC2 Associations page at http://cadcwww.hia.nrc.ca/wfpc2/ A second release is planned for 2004 where more extensive documentation will be provided, including a refereed publication describing the processing methods and results. An acknowledgement of the usage of the WFPC2 Associations would also be appreciated in your publication, as being obtained "from the CADC": "Guest User, Canadian Astronomy Data Centre, which is operated by the Herzberg Institute of Astrophysics, National Research Council of Canada." Byte-by-byte Description of file: launch.dat sm*.dat Byte-by-byte Description of file: launch.dat sm*.dat
Bytes Format Units Label Explanations
1- 30 A30 --- Target Target Name, as given by the proposer 32- 33 I2 h RAh Right Ascension J2000 (hours) 35- 36 I2 min RAm Right Ascension J2000 (minutes) 38- 42 F5.2 s RAs [0,60] Right Ascension J2000 (seconds) 44 A1 --- DE- Declination J2000 (sign) 45- 46 I2 deg DEd Declination J2000 (degrees) 48- 49 I2 arcmin DEm Declination J2000 (minutes) 51- 54 F4.1 arcsec DEs [0,60] Declination J2000 (seconds) 56- 61 F6.2 deg v3 *V3 roll angle during observation 63- 68 A6 --- fov *The field of view configuration 70- 84 A15 --- config *Instrument configuration 86-100 A15 --- Mode Instrument operating mode 102-113 A12 --- Aper *Apertures used 115-129 A15 --- Spec *Spectral elements used. 131-135 I5 0.1nm wave *"Central" wavelength of the observation 137 A1 --- flagC *[TF] Flag indicating corrective optics 139-143 I5 s expTime Length of exposure (in seconds) 145-149 I5 --- propID Proposal ID. 151-159 A9 --- Dataset Dataset name, uniquely identifies the data for a given exposure. 161-164 I4 yr ObsDate.Y *? Observation starting time (year) 166-167 I2 "month" ObsDate.M [1,12]? Observation starting time (month) 169-170 I2 d ObsDate.D [1,31]? Observation starting time (day) 172-173 I2 h ObsDate.h [0,24[? Observation starting time (hour) 174 A1 --- --- [:] Separator 175-176 I2 min ObsDate.m [0,60[? Observation starting time (minute) 179-182 I4 yr RelDate.Y Release Date (year) 184-185 I2 "month" RelDate.M [1,12] Release Date (month) 187-188 I2 d RelDate.D [1,31] Release Date (day of month) 190-191 I2 h RelDate.h [0,24[ Release Date (hour) 192 A1 --- --- [:] Separator 193-194 I2 min RelDate.m [0,60[ Release Date (minute) 196 A1 --- Sp [S] Existence of Spectrum Preview 197 A1 --- Im [I] Existence of Image Preview 198 A1 --- Im1  Existence of a second preview
Note on v3: The roll angle is the angle between the telescope axis and the line of sight. Note on fov: "LAUNCH" for the first period from launch (1990Apr) to 1993Dec "SM93" for the period between 1993Dec to 1997Feb "SM97" since 1997Feb. Note on config: The basic instruments are: FGS = Fine Guide Sensor (astrometer, interferometer) FOC = Faint Object Camera (imager), see details at http://www.stsci.edu/ftp/instrument_news/FOC/topfoc.html FOS = Faint Object Spectrograph, see details at http://www.stsci.edu/ftp/instrument_news/FOS/topfos.html HRS = High Resolution Spectrograph HSP = High Speed Photometer NIC = NICMOS (Near Infrared Camera and MultiObject Spectrometer, imager, spectrometer) http://www.stsci.edu/instruments/nicmos/topnicmos.html PC = Planetary Camera (imager, see WFPC / WFPC2) STIS = Space Telescope Imaging Spectrograph, see http://www.stsci.edu/cgi-bin/stis?cat=core WFC = Wide-Field Planetary Camera 1 from April 1990 to November 1993, see http://www.stsci.edu/ftp/instrument_news/WFPC/wfpc1_top.html WFPC2 = Wide-Field Planetary Camera Version 2 since November 1993, see http://www.stsci.edu/instruments/wfpc2/wfpc2_top.html ACS = Advance Camera for Surveys, since March 2002, see http://www.stsci.edu/hst/acs/ Note on Aper: Multiple apertures are delimited by semicolons Note on Spec: The designation depends on the instrument used. The most common values start by: E: Echelle spectrographs F: Filters, followed by the mean wavelength (in nm or 10nm depending on the instrument), and the indication of the passband width as W(wide), M(medium), N(narrow) G: Gratings P: Polarimeters, prisms, pupils Note on wave: The central wavelength, in Angstroms, of the observation. For images, this is the central wavelength of the filter used, while for spectra, it is midpoint of the wavelength range of the spectrum. Note on ObsDate.Y: A few observations (mostly in the "launch" file) have no associated observation date. Note on flagC: Flag indicating corrective optics were used (i.e., COSTAR, WFPC2) as True or False.
Byte-by-byte Description of file: wfpc2.dat
Bytes Format Units Label Explanations
1- 4 I4 --- propID Proposal ID og the Association 6- 14 A9 --- AssocID Association ID (filename) 16- 23 F8.4 deg RAdeg Right Ascension (J2000) 25- 32 F8.4 deg DEdeg Declination (J2000) 34- 42 I9 s ObsStart Date of First shutter open action (in DMF = seconds since 01-Jan-1980) 44- 52 I9 s ObsEnd Date of Last shutter close action (in DMF = seconds since 01-Jan-1980) 54- 61 F8.1 s ExpTime Total exposure time for this association 63- 71 I9 s Creation Date (DMF time = seconds since 01-Jan-1980) of the generation of this association 73- 81 I9 s RelDate Release date for the association (DMF time since 01-Jan-1980) 83- 89 A7 --- FGSlock *Indicate the quality of the guiding 91- 96 F6.2 deg v3 *V3 roll angle during observation 98-127 A30 --- Target Target Name, as given by the proposer 129-143 A15 --- Filter Filter (s) used for the Association 145-148 I4 0.1nm Bw ? Filter bandwidth in Angstroems 150-154 I5 0.1nm wave ? "Central" wavelength of the observation 157-169 A13 --- ExpQual Exposure quality (INDETERMINATE, INTERRUPTED, NORMAL) 171-174 A4 --- fov Configuration of field of view (SM-1 or SM-2) 176-178 I3 --- Nmem Number of members for this association 180 I1 --- Atyp *Association type
Note on FGSlock: the values are FINE (use of guide stars), GYROS (use of the gyroscopes) FINE/GY (mixed mode), or UNKNOWN Note on v3: The roll angle is the angle between the telescope axis and the line of sight. Note on Atyp: The association number has the following meaning: blank or 0: a single exposure, not a real association 1: the members' offsets from the leader of the association (defined to be the first deepest exposure) were all derived from WCS information. 2: The members' offsets from the leader of the association were all derived from jitter information. 3: The members' offsets from the leader of the association were partly derived from WCS and partly from jitter information. 4: The members' offsets from the leader of the association were all measured by cross-correlation. 5: The members' offsets from the leader of the association were partly derived from cross-correlation and partly from WCS information. 6: The members' offsets from the leader of the association were partly derived from cross-correlation and partly from jitter information. 7: The members' offsets from the leader of the association were partly derived from WCS, partly from jitter, and partly from cross-correlation information.
History: The file is monthly updated from HST files. The WFPC2 Associations (wfpc2.dat) was kindly supplied by CADC in October 2003. Acknowledgements: It is a pleasure to thank Robert Hanisch for the access and installation of the data files, and Daniel Durand for the details about the previews and the WFPC2 Associations.
(End) Francois Ochsenbein [CDS] 06-Sep-2007
|The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line|