Terapix Star Formation Region IC 1396, © 2002 CFHT
VLT-Descart processing status
by GTI - Updated December 21st, 2003

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Targets status summary

Status Target Ident Coadded frames Seeing Coadded image Comments
vlt27 6 frames 0.72" vlt27.fits ok, but problems with the moon => background at 13400
vlt28 6 frames 0.54" vlt28.fits ok
vlt29 6 frames 0.49" vlt29.fits ok, but final seeing should be better. Image elongation in the NE corner for ESO
vlt30 6 frames 0.54" vlt30.fits ok. Image elongation in the SW corner for ESO
vlt31 6 frames 0.57" vlt31.fits ok
vlt33 6 frames 0.44" vlt33.fits ok, but final seeing should be better
vlt35 6 frames 0.73" vlt35.fits ok
vlt36 6 frames 0.68" vlt36.fits ok, but problems with twilight (last frame with high background) and the PSF changes a lot in amplitude and shape across the field
vlt37 7 frames 0.90" vlt37.fits out of specs. Only 3 frames with seeing < 0.8
vlt39 6 frames 0.76" vlt39.fits ok, but only 5 frames have a seeing < 0.80". Wind? Elongation for stars in frames 5 and 6
vlt40 6 frames 0.71" vlt40.fits ok. Check for elongation due to the wind
vlt42 6 frames 0.72" vlt42.fits ok
vlt43 8 frames 0.55" vlt43.fits ok
vlt44 6 frames 0.64" vlt44.fits ok
vlt45 6 frames 0.46" vlt45.fits ok
vlt46 6 frames 0.65" vlt46.fits ok, but horizontal stars elongation
vlt47 6 frames 0.51" vlt47.fits ok
vlt48 6 frames 0.63" vlt48.fits ok, but horizontal stars elongation (wind)
vlt49 6 frames 0.62" vlt49.fits ok, but horizontal stars elongation 
vlt50 6 frames 0.55" vlt50.fits ok
vlt51 6 frames 0.62" vlt51.fits ok. Due to the moon the flat is not perfect
vlt52 7 frames 0.65" vlt52.fits ok. The night was not photometric. Problems with alignement
vlt53 5 frames
6 frames
0.55"
0.53"
vlt53.fits
vlt53_bad.fits
ok, but only 5 frames can be used. Two frames with a slightly bad alignement
vlt54 6 frames 0.57" vlt54.fits ok
vlt55 6 frames 0.53" vlt55.fits ok, but background at 10600 with 3 frames taken after twilight
vlt56 6 frames 0.83" vlt56.fits slightly out of specs. Three frames over six have a seeing > 0.8
vlt57 6 frames 0.55" vlt57.fits ok
vlt58 12 frames 0.49" vlt58.fits ok. All the frames have some problem: moon or cirrus, but the seeing is very good. Background at 11400.
vlt59 6 frames 0.70" vlt59.fits ok
vlt60 6 frames 0.47" vlt60.fits ok, but final seeing should be better
vlt61 6 frames 0.47" vlt61.fits ok. Vignetting in the bottom-left corner 
vlt62 6 frames 0.47" vlt62.fits ok, but final seeing should be better
vlt63 6 frames 0.49" vlt63.fits ok
vlt64 6 frames 0.60" vlt64.fits ok, but the background of all the images is high (for the coadded image is 10900)
vlt65 6 frames 0.54" vlt65.fits ok
vlt66 5 frames
6 frames
0.77"
0.80"
vlt66_good.fits
vlt66.fits
ok, but only 5 frames have seeing < 0.8. High background (18400 18700) due to the moon. Seeing very unstable on short timescales
vlt75 6 frames 0.56" vlt75.fits ok
vlt76 6 frames 0.63" vlt76.fits ok, but high shift errors in the alignement
vlt77 9 frames
12 frames
0.80"
0.80"
vlt77_good.fits
vlt77.fits
ok, but only 7 frames were taken with seeing < 0.80". Stars elongation in 2 frames
vlt78 6 frames 0.50" vlt78.fits ok
vlt79 9 frames
14 frames
18 frames
0.75"
0.76"
0.81"
vlt79_good.fits
vlt79_better.fits
vlt79.fits
ok. Among the 8 frames with seeing < 0.8, six have a very high background (probably due to the moon)
vlt80 6 frames 0.60" vlt80.fits ok
vlt81 6 frames 0.63" vlt81.fits ok. Check for wind
vlt82 7 frames
9 frames
0.59"
0.58"
vlt82_good.fits
vlt82.fits
ok. Strange: adding a frame with seeing=1", the final seeing is better
vlt83 7 frames 0.87" vlt83.fits out of specs: seeing slightly too high
vlt84 6 frames 0.91" vlt84.fits out of specs: seeing too high
vlt85 6 frames 0.66" vlt85.fits ok
vlt86 6 frames 0.78" vlt86.fits ok. Check for wind
stis7new 6 frames
12 frames
0.76"
0.90"
stis7new.fits
stis7new_bad.fits
NOT TO BE USED: PSF of stars completely crazy, problems with alignement and high background due to the moon for the only 6 frames with seeing < 0.8
stis10new 8 frames
12 frames
0.93"
0.99"
stis10new_good.fits
stis10new.fits
out of specs: high seeing and wind

Legend

Symbol Meaning
images with no serious problems, though some show some defects (first choice are images with "ok" alone in the comments column)
images with serious problems, especially concerning the shape of the PSF
images should not be used because of serious problems affecting them


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