IJAF reports

Danish Astronomy 2010

Read the report online, or download PDF version.

Annual reports

The MS-Word format reports are not complete in this on-line version, as most figures are missing.

Technical reports

  1. Commissioning of HiRAC at the Nordic Optical Telescope:
    During January 8-16, 1996, the tip/tilt correcting adaptive optics camera HiRAC was succesfully commissioned at the NOT. The performance on the telescope is described.

  2. Image quality at the Nordic Optical Telescope:
    The image quality of the Nordic Optical Telescope is investigated by comparing image quality measurements from CCD data with simultaneous seeing data obtained with the nearby IAC seeing monitor. We find a difference between the seeing monitor and the image quality at the NOT of 0.25 +/- 0.05 arcseconds. We attempt to estimate the sources of aberration, and show that they may account for the difference. We conclude, that if the image quality of the telescope is optimized, a median image quality of approx. 0.4 arcseconds should be obtainable during the summer season, using tip/tilt correction.

  3. HiRAC II, a 5-mode adaptive optics system for the NOT:
    The performance of an upgraded HiRAC, correcting atmospheric defocus and astigmatism is estimated. Due to recent understanding of outer scale turbulence effects and factors degrading image quality at the NOT, better performance than initially estimated is found now. Design is briefly described and cost of implementation is estimated.

  4. Washing CCD's:
    Report on an attempt to remove oil contamination from the W11-4 CCD before re-installation in the DFOSC camera. Performance of the CCD before and after cleaning is compared, showing significant improvement by washing. The procedure for washing is described.

  5. The ALFOSC Camera:
    A test report on the CCD-camera and cryostat, made before commissioning at the NOT.

  6. NOTCam: Vacuum and cryogenic characterization
    Results from pre-commissioning tests.

  7. Characterization of the Mosaic Camera, 2nd edition for the 2nd commissioning run
    Description of the camera performance, as measured before commissioning at the NOT.

Here is a description of the controller, camera and software, "A versatile PC-based CCD camera system", written by Jens Klougart.
Compressed postscript format , PDF format
This was presented at the "IS&T/SPIE's Symposium on Electronic Imaging: Science & Technology", February 5 - 10, 1995, and published in SPIEE Conf. Proc. Vol 2416, p. 65.

In "Optical Detectors for Astronomy", proceedings of an ESO CCD Workshop held in Garching, Germany on October 8-10, 1996, you will find the following articles:

"The Astronomical CCD Development Program at Copenhagen University" by Johannes Andersen
An interferometric method for measurement of the detector MTF by Michael I. Andersen and Anton Norup Sørensen
Cleaning contaminated CCDs by Anton Norup Sørensen

Bruno Hiberty's thesis for his MSc degree : Improvement of the Instrumentation of the Danish 1.54m Telescope.

For test reports of the CCD cameras in use, please go to the CCD page.

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Last updated January 23, 2004