A Performance Comparison for Two Versions of the Vulcan Photometer

Details A Performance Comparison for Two Versions of the Vulcan Photometer A Performance Comparison for Two Versions of the Vulcan Photometer

Feb 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001phot.work...63b&link_type=abstract

Third Workshop on Photometry, p. 63

Computer Science

Performance

Charge Coupled Devices, Image Motion Compensation, Photometers, Declination, Field Of View, Flexing, Illuminating, Lenses, Pixels, Reconnaissance, Shot Noise, Sky Brightness

Scientific paper

Analysis of the images produced by the first version (V1) of the Vulcan photometer indicated that two major sources of noise were sky brightness and image motion. To reduce the effect of the sky brightness, a second version (V2) with a longer focal length and a larger format detector was developed and tested. The first version consisted of 15-centimeter (cm) focal length, F/1.5 Aerojet Delft reconnaissance lens, and a 2048 x 2048 format front-illuminated charged coupled device (CCD) with 9 microns micropixels (Mpixels). The second version used a 30-cm focal length, F/2.5 Kodak AeroEktar lens, and a 4096 x 4096 format CCD with 9 micro pixels. Both have a 49-square-degree field of view (FOV) but the area of the sky subtended by each pixel in the V2 version is one-fourth that of the V1 version. This modification substantially reduces the shot noise due to the sky background and allows fainter stars to be monitored for planetary transits. To remove the data gap and consequent signal-level change caused by flipping the photometer around the declination axis and to reduce image movement on the detector, several other modifications were incorporated. These include modifying the mount and stiffening the photometer and autoguider structures to reduce flexure. This paper compares the performance characteristics of each photometer and discusses tests to identify sources of systematic noise.

Affiliated with

Also associated with

No associations

Rating

A Performance Comparison for Two Versions of the Vulcan Photometer does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A Performance Comparison for Two Versions of the Vulcan Photometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Performance Comparison for Two Versions of the Vulcan Photometer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1217080