1. Miscellaneous results of flight calibration analysis
Star fields and stellar calibrations:
Relative geometry spacecraft cameras
Intensity calibration
Focus
Comet LINEAR
Straylight
Flat fields (very quick look)

2. Relative pointing 0/2048 y 2048/2048 Prepixels amplifier A
Prepixels amplifier B
0/0
2048/0 x
S/c pointing direction on NAC: 1001,1051
S/c pointing direction on WAC: 1039, 962
NAC center on WAC: 1037, 954
WAC center on NAC: 1091, 1370

3. Intensity calibration
Definition of calibration factor
A = C/ I
A: Calibration factor [DN s-1 / W m-2 nm-1 sterad-1]
C: Count rate [DN s-1]
I: Irradiance of the lamp [W m-2 nm-1 sterad-1] at the central wavelength of the filter combination

4. Results (WAC)
Laboratory
Standard Star

5. Results (WAC)
Visible range: Stellar calibration comparable to Lab values
Better internal consistency
Discrepancy to theoretical expectations remains
UV range: Unfortunately no good UV calibration < 330 nm available
375 and 388 are ok

6. Results (NAC)
Laboratory
Standard Star

7. Results (NAC)
UV and near-IR: Everything (Star, lab, and theoretical prediction) consistent
Visible: Stellar calibration ~ 20 % above Lab. Calibration, expectation in between
Partly resolved by relative spectral response
Partly unexplained
Neutral density filter inconsistency remains

8. Significance of relative spectral response

9. Focus
NAC:
Star FWHM pixels dependent on filter combination
Exception: near focus plate expectedly out of focus (~ 3 pixels FWHM)
Wings of PSF clearly visible in some filters
WAC:
FWHM pixels dependent on filter combination

10. Focus
WAC
NAC

11. Unexplained effect in star fields
Nearly (but not exactly) vertical stripes
Meteors?
Too dark, too large if at typical solar system velocity (kms/s)
Spacecraft junk?
Too dark, if resolved
Extension of ~20 pixels difficult to explain, if unresolved
Instrumental effect
Consistent motion along field of view seen in 3 images
Seen in 2 different filters
WAC starfield from 5 June

12. Comet LINEAR Straylight with default filter combinations
~ 100 DN/s with the NAC
~ 200 – 2000 DN/s with the WAC
Due to various anomalies at the end of slot 2 presentable images obtained with the NAC only
Plasma tail clearly visible

13. Comet imaging Comet 2002 T7/LINEAR observed on 1 May
5 images in different colours with the NAC

14. OSIRIS NAC Multicolour Image
Comet C/LINEAR 2002 T km distance – 1. May 2004

15. Images with internal lamps
Visible: No changes to pre-flight on first look
UV: Intensities (=leakage of visible/IR light) surprisingly high
Dark current needs to be evaluated