Below are listed the most recent releases of FOS calibration products.
POA_CALFOS replaces CALFOS as the standard IRAF STSDAS FOS calibration
package offering an improved correction to the zero point offsets, dispersion
relations and dark correction and new flatfields files appropriate for
use with the POA_CALFOS pipeline. Version 1.2 was the final major release,
v1.2.1 supplements this with some minor patches and updates.
(30 Jan 1998) Listings based upon FOS Calibration Closeout. AIS reference
files and tables and SINGLE aperture post-COSTAR flatfield reference files
(30 September 1998) FOS/BL wavelength zero-points shifted systematically
from launch through de-commissioning by a total peak-to-peak amount of
approximately 7 quarter-stepped pixels (1.75 diodes). A quick-fix correction
algorithm is provided to allow post-calfos correction of the wavelengths
in FOS/BL wavelength data files (.c0 files). Note: This correction
is incorporated in the POA_CALFOS
pipeline, no further correction is necessary for data reduced with the
(30 December 1997) The 16-bit FOS accumulators were limited to 65536 counts
in any individual read out before they would "wrap around". The existing
STSDAS routine unwrap can be used to fix many cases, but is not
always successful. We provide here IDL coding (fos_overflow.pro)
of a more robust algorithm that has been used by FOS team members to unwrap
pathological cases. The code is provided "as-is" without warranty.
(21 January 1998) FOS theoretical Point Spread Functions (PSFs) were calculated
with TIM for the pre-COSTAR era and presented in FOS ISR 104. We present
a listing of the PSFs available in the HST database as described in that
FOS theoretical Line Spread Functions (LSFs) were calculated from TIM
model PSFs for the pre-COSTAR era and presented in FOS ISR 104.
POA | ESA | NASA
| ST-ECF Archive |
ESO | ST-ECF | STScI
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Last modified: Wed Jul 14 16:28:33 MET DST 1999