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Hubble Space Telescope
PSFs taken in SMOV - 3/11/1994

The following images were taken as part of the PSF program (4788) or else in the absolute sensitivity program (4787). All images can be found in the subdirectory f96/foc+costar/. All PSF stars are centered relatively well in the field of view. In every case, the target is BPM16274. The format indicators follow this rule:

"n" refers to normal pixels, "z" to zoomed pixels.

The format indicator is made up of 2 numbers that give you the size of the format in pixels, with x first and y second. If the format is nij, then the size of the image is 1024*2**-i by 1024*2**-j. So if i is 1 and j is 1 (i.e. n11 format), the expanded format is 1024*2^-1 (=512) by 1024*2^-1 (=512). The following are possible formats:

Mnemonic      Format

z10           512X1024(Z)
z11           512X512(Z)
z20           256X1024(Z)
n10           512X1024
n11           512X512
n22           256X256
n33           128X128
n20           256X1024

Image       Filters        Exp Time  Prop  Format    Comments
-------------------------------------------------------------------------------------
F120Ma.hhh  F120M            596     4787   z10    Overflowed & saturated
F140M.hhh   F140M+F2ND       896     4787   n11    Near reseau mark
F170M.hhh   F170M+F4ND       896     4787   n11    Near reseau mark
F210M.hhh   F210M+F4ND       896     4787   n11    Near reseau mark
F307M.hhh   F307M+F4ND       896     4787   n11    
F410M.hhh   F410M+F4ND       896     4787   n11    
F501Na.hhh  F501N+F1ND       896     4787   n11    Filter artifact: ghost @ [-68,-12]
                                                   pixels from center of PSF
F550M.hhh   F550M+F1ND       896     4787   n11    Near reseau mark
F120Mb.hhh  F120M            596     4788   z10    Overflowed & saturated
F120Mc.hhh  F120M            896     4788   n22    "Jet"
F152M.hhh   F152M+F2ND       896     4788   n22    "Jet"
F220W.hhh   F220W+F4ND+F1ND  896     4788   n22    "Jet"
F342W.hhh   F342W+F6ND       896     4788   n22
F372M.hhh   F372M+F4ND+F1ND  896     4788   n22    Strong artifact - bar through PSF,
                                                   45 degrees to spider
F430W.hhh   F430W+F4ND+F1ND  896     4788   n22
F486N.hhh   F486N            896     4788   n22
F480LP.hhh  F480LP+F2ND+F1ND 896     4788   n22
F501Nb.hhh  F501N+F1ND       896     4788   n22    Ghost
F320W.hhh   F320W+F6ND       496     5517   n22    filter-shift,degraded

There are more PSFs for the F486N filter that were taken as part of the alignment program or else as a probe of field effects, users should contact STScI for more information.

The PSF for the F320W filter reflects the problems arising from its severe filter-induced image shift. This filter shift moves the PSF to the edge of the 256x256 field of view and induces the aberrations seen in this PSF.