An observation of a celestial source generally results in data which are insufficient for a unique reconstruction of the desired brightness profiles of the source. Two typical situations are considered here which pertain ...

The advent of array detectors has given a tremendous boost to the detection capabilities in the near infrared region over the last 5 years. A variety of instrumentation has been and is being built around these panoramic ...

This paper describes the status of the development of software for coded mask imaging with the Scanning Sky Monitor aboard the proposed Indian multi wavelength astronomy satellite ASTROSAT.

A review is presented of Monte Carlo simulations of the effects of differing atmospheric structure and absorption models on the Imaging Atmospheric Cherenkov Telescope signal. Methods of monitoring the atmosphere are discussed.

During a project work done by a group of students at senior secondary stage with the guidance of the author, the vertical pillar kind of gnomon has been improved upon. Whereas the traditional gnomon can measure altitude ...