Abstract
A program of High Angular Resolution observations of stars and their circumstellar regions using the technique of lunar occultations has been initiated at the 1.2 m telescope at Gurushikhar (24°39’ N, 72°47’ E), India. A liquid nitrogen cooled ILLSb detector based high speed Infrared photometer with millisecond data acquisition capabilities has been developed for the near Infrared region (1-5µm) and eight occultations have been successfully observed in the K band (2.2µm ). The sources are (IRC No. -10578, +10013, +20034, +30094, +20190, +20200, +20073 and +00198. The diffraction pattern is clearly seen in all the observations. A convolution analysis involving the system frequency response, filter bandwidth and one dimensional source structure has been carried out to fit the data. System capability has been determined to be~6 milliarcseconds
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© 1994 Springer Science+Business Media Dordrecht
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Chandrasekhar, T., Ashok, N.M., Ragland, S. (1994). Near Infrared High Angular Resolution Observations of Stars and Circumstellar Regions by the Technique of Lunar Occultations. In: Robertson, J.G., Tango, W.J. (eds) Very High Angular Resolution Imaging. International Astronomical Union / Union Astronomique Internationale, vol 158. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0880-5_72
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DOI: https://doi.org/10.1007/978-94-011-0880-5_72
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