Methods for accurate photographic stellar spectrophotometry using the solar spectrum as calibration
Abstract
Methods for photographic spectrophotometry using single-pass spectrographs are developed with the purpose of obtaining stellar spectra of sufficiently high quality to allow detailed spectral line studies over extended wavelength regions. The spectrograph instrumental profile and photographic development effects are investigated, and the corresponding MTFs are determined by measuring the modulation experienced by a calibration spectrum of skylight and moonlight which is exposed side by side with the stellar spectrum on each plate. Either of these calibration spectra is very similar to the accurately known spectrum of integrated sunlight, whose modulation in the observing/recording/measuring process is then determined.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- October 1980
- Bibcode:
- 1980A&A....90..151L
- Keywords:
-
- Astronomical Photography;
- Solar Spectra;
- Stellar Spectrophotometry;
- Accuracy;
- Calibrating;
- Lunar Radiation;
- Modulation Transfer Function;
- Photographic Plates;
- Sky Brightness;
- Spectrographs;
- Sunlight;
- Astronomy