List of Reserved Observations
=============================
[SAI/96-172/Dc]
19 August 1996
Introduction and Policy
----------------------The general policy of the ISO Observatory is to avoid duplication i.e.,
repeating the same observation, because--after the expiration of the
proprietary period--all data enters the public domain for archival
research.
Duplication is determined by consideration of the target observed, the
observing mode used, details of the observation parameters (e.g. size of
rasters, wavelength ranges, filters) and the scientific objective. In
general, it is not permissible to duplicate a combination of target and
observing parameters.
In the special case of LWS, when a LWS01 comparison observation is needed
to
defringe the data of the primary LWS observation, the LWS01 observation
will
in principle not be considered as a duplication with an exisiting LWS01
observation. However, the observer who originally proposed the LWS01
observation will retain all science rights to the data during the
proprietary period.
More details can be found in the ISO SUPPLEMENTAL CALL FOR PROPOSALS POLICIES AND PROCEDURES (section 4.3.2).
The list of Reserved Observations supersedes the Guaranteed Time
catalogue
of observations released with the pre-launch call.
History and Resolution of Existing Duplications
----------------------------------------------The Guaranteed Time observations, as planned pre-launch, were published
to
the community with the pre-launch Call. Open time proposals in response
to
the pre-launch Call were not permitted to duplicate these GT
observations.
After the end of the Performance Verification phase, many observations
(both
OT and GT) were updated. In addition to this process, certain additional
targets have been entered into the Mission Data Base:
(a) observations from Guaranteed Time "spring" target lists that, due
to the exact time of launch and the expected extended lifetime of
ISO, have become visible.
(b) observations from Open Time programs which had ONLY Spring
Launch targets.
(c) Guaranteed Time follow-up observations, using some of the
additional
GT made available by the expected extended lifetime.
While efforts have been made to ensure that duplication has been avoided
in
this list of reserved observations, it is likely that due to both the
number
of observations and changes involved, some duplication may remain.
As necessary, this will be resolved with first rights going to Guaranteed
Time observations published with the pre-launch Call, second rights to
Open Time observations recommended by OTAC in the pre-launch Call and
third
rights to modified or additional Guaranteed Time observations. Within
categories, respective priorities will be taken into account.
Contents
-------The reserved observation list reflects the current ISO scientific
programme.
The list contains many of the observational parameters so as to permit
identification of potential duplications. It includes planned
observations
(whether released for scheduling or not) which are present in the Mission
Data Base as of 26 July 1996 as well as executed observations as of
5 August 1996. In particular:
Included
~~~~~~~~
* The Guaranteed Time Programme, irrespective whether temporarily
blocked for observation (i.e. fixed time "do not schedule") or
not.
Grades: 9, 7, 4
* Open Time Programme (OTAC Priorities 1 and 2), regardless of
whether temporarily blocked (i.e. fixed time "do not schedule")
or not.
Grades: 8, 6.
* EXECUTED Open Time observations of OTAC Priority 3.
Grades: 3, 2.
NOT included
~~~~~~~~~~~~
* Open Time observations of OTAC Priority 3 NOT YET EXECUTED or
scheduled as of 5 August 1996. Grades: 3, 2.
* Any observation which was removed from a GT or OT
programme or set to Grade: 1.
The entire list comprises more than 40,000 entries, corresponding to
about
20,000 observations. To facilitate effective downloading and subsequent
searches, the list has been organised in five separate files:
*
MAIN RESERVED TARGET LISTS, including both pointed
observations and tracking observations of Solar
System Observations (SSOs). The SSOs appear first
in the list, sorted by target name (note that the
equatorial coordinates for tracking observations of
SSOs will appear as 0.0, 0.0). The pointed
observations follow the SSOs, sorted in order of increasing
Right Ascension. SSO observers should be aware that
many observations of SSO targets have been done as
fixed-time pointed observations -- it is wise to
search the entire list by target name.
There are
ISOCAM LWS
ISOPHOT SWS
-
4 separate lists; one for each instrument.
CAM_RES
LWS_RES
PHT_RES
SWS_RES
* POLARISATION OBSERVATIONS, sorted by Right Ascension.
One list including CAM and PHT observations:
POL_RES (Not yet available)
How to use the Reserved Observations List
----------------------------------------Please download the ASCII files from the ftp server and use available
software tools on your system to make the searches you need (e.g. with
SEARCH
on VAX/VMS or grep etc. on Unix systems, or sorting routines).
Below is a detailed explanation of the parameters included in each
list; apart from some general parameters (e.g. target name, coordinates)
the observation parameters differ for each instrument. In many cases
there may be more than 1 line in the list for a single Observation
Sequence number (OSN). This means there was more than one measurement
in the observation (a single AOT), e.g. for an SWS02 observation of 64
individual spectral lines there are 64 different lines in the list for
that particular OSN.
Each list includes a very brief header identifying
the column boundaries.
Detailed Description 1: General Parameters
-------------------------------------------For every instrument there is a common part and an instrument and AOT
specific part. In the common part the columns are:
* OBSID:
The Observer ID assigned by the ISO Science Operations Centre
which uniquely identifies the Principal Investigator
* PROPID: The Proposal ID assigned by the observer which uniquely
identifies a proposal or proposal part (a large proposal
may be broken into several sub-proposals called proposal
parts).
* OSN:
Observation Sequence Number, uniquely identifies an
observation
(specified using a single AOT) within a proposal part. ION
(ISO Observation number) is a synonym for OSN.
* RA:
Right Ascension in hours, minutes, seconds as (hh mm ss.s)
(Epoch at 2000.0 and J2000 equinox)
* DEC:
Declination in degrees minutes and seconds as (dd mm
ss.s)
(Epoch at 2000.0 and J2000 equinox)
* INS:
Instrument used (CAM, PHT, LWS, SWS)
* AO:
AOT number (e.g. An LWS04 measurement has INS=LWS,
AO=04).
Detailed Description 2: Raster Parameters & Target Name
------------------------------------------------------After the general columns are the Instrument-specific columns, followed
by the raster map columns and the target name. Note: no SWS AOTs allow
raster mapping, so the SWS file lacks these columns. See the ISO
Observer's manual for a description of the raster parameters and
spacecraft axes.
*
*
*
*
*
M: Number of points in a scan line
N: Number of scan lines
DM:
Distance between points in a scan line [arcsec]
DN:
Distance between scan lines [arcsec]
ANG:
Orientation angle of the scan lines relative to
equatorial coordinates (E of N).
* R:
Reference flag for raster orientation. R=0 means the
orientation is given in degrees east of (J2000) North. R=1
means the scan line is "locked" to the Y axis. The Y axis is
orthogonal to X (boresight) and Z (angle to the sun).
* NAME: The target name as given by the observer (truncated to
13-15 characters).
Detailed Description 3: Instrument-specific parameters
-------------------------------------------------------Every instrument has a separate set of parameters which are detailed
below. The detailed meaning of the parameters is described in the
respective observer's manual.
CAM
===
* FILT:
The filter used
CAM01 & CAM03: if a fixed filter, the filter name
if a CVF filter "CVF" and the wavelength is
found in CVFs.
CAM04 (CVF scan): "CVF" and the range will be found in
CVFs and CVFe.
*
*
*
*
*
Tint:
G:
PFOV:
Nexp:
CVFs:
* CVFe:
The basic integration time per exposure [s]
The gain in the converter
The pixel field of view [arcsec]
The number of Tint long exposures (per map point if a raster).
Starting wavelength [um]
CAM04: the start wavelength for the scan
CAM01 & CAM03: if CVF filter, the wavelength, if fixed
filter not applicable (NA)
End wavelength for a CVF scan [um]
CAM04: used, otherwise NA
LWS
===
* W1:
[um]
* W2:
* Line:
* Nbr:
* S/N:
* Tint:
Wavelength Start; red-shifted beginning wavelength for a scan
LWS01 & LWS03: used, otherwise NA
Wavelength End: red-shifted ending wavelength for a scan [um]
LWS01 & LWS03: used, otherwise NA
Line Wavelength [um]
LWS02 & LWS04: The red-shifted wavelength of the line to be
observered, otherwise NA
Number of resolution elements to each side of Line
LWS02 & LWS04: used, otherwise NA
The minimum signal to noise ratio required. If S/N=0 then
integration must be specified. Note that S/N requested is
difficult to interpret for a range scan -- it applies to
an unspecified reference wavelength and flux.
The integration time per resolution element [s]
If Tint=0 then S/N must be specified.
PHT
===
* FILT: The wavelength of the filter [um] OR
PHT40 (PHT-S spectroscopy): "SS", "SL" or "BOTH" if the
short wavelength, long wavelength or both sections of PHT-S
are used.
* S/N: The minimum signal to noise ratio required. If S/N=0 then
integration time must be specified.
* Tint: The integration on source [s]
If Tint=0 then S/N must be specified.
PHT32: The raster map parameters have a slightly different
meaning for the oversampled mapping AOT PHT32:
* M:
Number of points in a map line
* N:
Number of map lines
* DM: The actual raster step size in Y as documented in Table 11
of the ISOPHOT Observer's Manual [arcsec]
* DN: The actual raster step size in Z as documented above [arcsec]
* ANG: The preferred raster angle. Note that the tolerance is not
available in the reserved target list, so both unconstrained
orientation and preferred angle of 0 will have ANG=0.
* R:
Always 1
SWS
===
Note that the rest-frame wavelengths for SWS AOTs are corrected for
the heliocentric velocity only -- for SWS07 the date of observation
is also taken into account.
* S:
Speed; the so-called scanning speed for SWS01
SWS01: used, otherwise NA
* V:
Heliocentric radial velocity of the source [km/s cz for high
redshift]
SWS02 & SWS06: applied to W1 (and W2) to get the Doppler shifted
wavelength of the line or scan range
SWS07: applies to both the F-P lines and the grating ranges
SWS01: NA
* DV: velocity range, specifies the width of the line [km/s]
SWS07: used for the F-P line measurements,
NA for the grating scans
SWS01,SWS02 & SWS06: NA
* W1: Wavelength start or Central Wavelength [um]
SWS02: The rest wavelength of the line
SWS06: The rest-frame start wavelength of the scan
SWS07: For the F-P lines, the rest-frame wavelength of the line
and
for the grating scan the start wavelength
SWS01: NA
* W2: Wavelength end [um]
SWS06: The rest frame end wavelength of the scan
SWS07: The rest frame end wavelength for the grating scan,
for the F-P line NA
SWS01 & SWS02: NA
* S/N: The minimum signal to noise ratio required
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