ISOCAM Interactive Analysis User's Manual Version 5.0 - ISO - ESA

Chapter 6
Beam-switch observation (CAM03)
6.1 Description of the observation
The data used here is from a CAM beam-switch calibration observation of HIC 96901. A beamswitch
observation comprises of a cycle of ISO pointings – an on source pointing followed by
an off source or reference pointing. There can be one or several cycles in a single observation.
Since each pointing is a STATE, we will have at least two STATEs per CONFIGURATION.
The CONFIGURATION (and in this case the STATE) parameters are: LW10 filter, 1.5 ′′ PFOV,
integration time of 2.10 s and gain 2. In the observation analysed here there are 4 cycles.
6.2 Data analysis
It is assumed in this section that you have read Chapter 3. Generally concepts described in that
section will not be re-described here.
1. Start a CIA session.
# cia
2. Convert your CISP data product into SCDs with spdtoscd.
CIA> spdtoscd, ’cisp05804610.fits’, sscd, dir=’$cia_vers/test’, /nowrite
24 SCDs in the SSCD: CSSC058046100101_02022715110701
seq channel mode fltrwhl pfov tint gain offset size ra dec
0 LW OBS LW2 6.0 25.20 1 512 1 295.463 50.518
1 LW IDLE LW2 6.0 2.10 2 512 1 295.463 50.518
2 LW OBS LW2 6.0 2.10 2 512 1 295.463 50.518
3 LW OBS LW2 6.0 2.10 2 512 1 295.462 50.518
4 LW OBS LW2 1.5 2.10 2 512 1 295.463 50.518
5 LW OBS LW10 1.5 2.10 2 512 14 295.462 50.518
6 LW OBS LW10 1.5 2.10 2 512 26 295.463 50.518
7 LW OBS LW10 1.5 2.10 2 512 21 295.462 50.518
8 LW OBS LW10 1.5 2.10 2 512 27 295.437 50.547
9 LW OBS LW10 1.5 2.10 2 512 21 295.437 50.547
10 LW OBS LW10 1.5 2.10 2 512 26 295.463 50.518
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