Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/7641
Title: Additional calibration of the ultraviolet imaging telescope on board AstroSat
Authors: Tandon, S. N
Postma, J
Joseph, P
Devaraj, A
Subramaniam, A
Subramaniam, I. V
George, K
Ghosh, S. K
Girish, V
Hutchings, J. B
Kamath, P. U
Kathiravan, S
Kumar, A
Lancelo, J. P
Leahy, D
Mahesh, P. K
Mohan, R
Nagabhushana, S
Pati, A. K
Kameswara Rao, N
Sankarasubramanian, K
Sriram, S
Stalin, C. S
Keywords: Ultraviolet astronomy
Ultraviolet telescopes
Astronomical instrumentation
Ultraviolet photometry
Spectroscopy
Issue Date: Apr-2020
Publisher: IOP Publishing
Citation: The Astronomical Journal, Vol. 159, No. 4, 158
Abstract: Results of the initial calibration of the Ultra-Violet Imaging Telescope (UVIT) were reported earlier by Tandon et al. The results reported earlier were based on the ground calibration as well as the first observations in orbit. Some additional data from the ground calibration and data from more in-orbit observations have been used to improve the results. In particular, extensive new data from in-orbit observations have been used to obtain (a) new photometric calibration that includes (i) zero points, (ii) flat fields, and (iii) saturation; (b) sensitivity variations; (c) spectral calibration for the near ultraviolet (NUV; 2000–3000 Å) and far ultraviolet (FUV; 1300–1800 Å) gratings; (d) point-spread function; and (e) astrometric calibration including distortion. Data acquired over the last three years show continued good performance of UVIT with no reduction in sensitivity in both UV channels.
Description: Restricted Access
URI: http://hdl.handle.net/2248/7641
ISSN: 0004-6256
Appears in Collections:IIAP Publications

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