VI/101 ISO Observation Log (ISO Team, 2001)
The ISO (Infrared Space Observatory) Observation Log
ADC_Keywords: Infrared sources ; Observatory log
Mission_Name: ISO
Description:
The Infrared Space Observatory (ISO) is an ESA (European Space Agency)
project with instruments funded by ESA member states (especially the
PI countries France, Germany, The Netherlands and the United Kingdom)
and with participation of ISAS (Japan) and NASA (USA). It was operated
from November 1995 till May 1998, almost a year longer than expected.
As an unprecedented observatory for infrared astronomy, able to
examine cool and hidden places in the Universe, ISO successfully made
nearly 30,000 scientific observations. The ISO data can be retrieved
from the ISO Data Archive, available at the ISO Data Centre at
http://www.iso.vilspa.esa.es, comprising about 140,000 observations,
including parallel mode and serendipity observations.
ISO helpdesk:
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 120 31103 The ISO Observation Log
abstract/* . 1732 Abstracts
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See also:
http://www.iso.vilspa.esa.es/ : the ISO Home Page
B/iso : ISO Observation Log of validated data (ISO Data Centre, 2001)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- FOV Maximum field of view of the observation (1)
11- 18 I8 --- TDT TDT Number of the observation (2)
20- 27 A8 --- ObsID Observer identification of the proposal
28 A1 --- abs [_*] '_' when the abstract is available (3)
29- 36 A8 --- PropID Proposal designation
38- 67 A30 --- Target Target Name, as given by the observer
69- 71 A3 --- AOT Astronomical observing template (4)
73- 80 F8.5 h RAhr ? Actual pointing Right Ascension (J2000) (5)
82- 90 F9.5 deg DEdeg ? Actual pointing Declination (J2000) (5)
92-100 I9 s oStart Start of observation as UTC seconds since
01 January 1989, 00:00:00 UTC
102-106 I5 s oLen Duration of observation
108-113 I6 nm minLam The shortest wavelength (6)
115-120 I6 nm maxLam The longest wavelength (6)
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Note (1):
For a number of SWS observations done with the Calibration Uplink
System (the S99 observations) this column contains "------N/A" (not
applicable).
Note (2):
The TDT number uniquely identifies an ISO observation.
Note (3):
when this flag is an underscore (_), the abstract file
is available in the abstract subdirectory, as a file named by the
concatenation of ObsID and PropID columns
Note (4): Instrument observing mode.
The first letter reveals the instrument:
C for ISOCAM, the infrared camera covering the 2.5-17µm range,
P for ISOPHOT, the photo-polarimeter operated between 2.5 and 240µm,
S for SWS, the Short-Wave Spectrometer covering the 2.4-45µm
wavelength range,
L for LWS, the Long-Wave Spectrometer covering the 45-196.8µm
wavelength range.
Note (5):
The centre coordinates of the observation as recalibrated after the
mission, given in the J2000 equatorial system.
Please note that for PHT rectangular chopping mode observations this
is not the source position but the spacecraft pointing which is in
between the on and off positions. For CAM beam switching observations
(CAM03) the position is the nominal on position. Note, however, that
in some cases the true target was put on the beam switching off
position and therefore the coordinates may be on an empty area of the
sky. These caveats will be fixed in the Legacy version of the ISO Data
Archive, planned for release in Autumn 2001.
Note (6): Shortest and longest wavelengths the photons were collected, i.e.
- for photometry the lowest/highest passband wavelengths
- for spectra the shortest/longest observed wavelengths
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Acknowledgements:
It is a pleasure to thank Timo Prusti and Alberto Salama, for the
multiple interactions and helps in the preparation of the data.
(End) Alberto Salama [ISO Centre], Francois Ochsenbein [CDS] 12-Apr-2001