In-orbit Performance of UVIT and First Results

Tandon, S. N.; Hutchings, J. B.; Ghosh, S. K.; Subramaniam, Annapurni; Koshy, G.; Girish, V.; Kamath, Pritish; Srinivasan, Kathiravan; Kumar, Amit; Lancelot, J. P.; Pathakoti, Mahesh; Mohan, Rekhesh; Murthy, Jayant; Nagabhushana, S.; Pati, A. K.; Postma, J.; Rao, N. Kameswara; Sankarasubramanian, K.; Sreekumar, P.; Sriram, S.; Stalin, C. S.; Sutaria, Firoza; Sreedhar, Yuvraj Harsha; Barve, Indrajit V.; Mondal, Chayan; Sahu, Snehalata

doi:10.1007/s12036-017-9445-x

Cited by 77 publications

(43 citation statements)

References 16 publications

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“…Key performance parameters of the three channels are presented in Table 1, and properties of the filters are shown in Table 2. For more details of the instrument the reader is referred to Tandon et al (2017b) and the references therein.…”

Section: Instrumentationmentioning

confidence: 99%

Additional Calibration of the Ultraviolet Imaging Telescope on Board AstroSat

Tandon

Postma

Joseph

et al. 2020

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140

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Results of the initial calibration of the Ultra-Violet Imaging Telescope (UVIT) were reported earlier by Tandon et al. (2017a). 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 which includes (i) zero-points (ii) flat fields (iii) saturation, (b) sensitivity variations (c) spectral calibration for the near Ultra-Violet (NUV; 2000−3000Å) and far Ultra-Violet (FUV; 1300−1800Å) gratings, (d) point spread function and (e) astrometric calibration which includes distortion. Data acquired over the last three years show continued good performance of UVIT with no reduction in sensitivity in both the UV channels.

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Section: Instrumentationmentioning

confidence: 99%

Additional Calibration of the Ultraviolet Imaging Telescope on Board AstroSat

Tandon

Postma

Joseph

et al. 2020

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121

140

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“…The POC, in cooperation with the Mission Group of Indian Space Research Organisation (ISRO), also monitors the operations for avoidance of such deterioration in the performance of UVIT. So far, the performance has not shown any detectable deterioration 2 . In general, the targets of interest for observations with UVIT are any objects which have hot regions within them.…”

Section: Introductionmentioning

confidence: 94%

“…Compared with a similar recent UV mission called GALEX 1 , UVIT has a much wider selection of spectral bands and a spatial resolution better by a factor ~3, but has a field of view smaller by a factor ~6 in solid angle. For more details regarding instrumentation, the reader is referred to Tandon et al 2 . The two UV detectors work in photoncounting mode with full-field readouts every ~35 ms providing positions of all detected photons, which are corrected for distortions in the detectors.…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet Imaging Telescope on AstroSat

Tandon¹,

Ghosh²,

Hutchings³

et al. 2017

Current Science

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The AstroSat satellite is designed for multiwavelength astronomy for observations covering a spectral range from soft and hard X-rays to the ultraviolet. The Ultraviolet Imaging Telescope (UVIT) is the only non-X-ray telescope on AstroSat and it provides the long lever arm to the multi-wavelength observations. In addition to the simultaneous multiwavelength studies in coordination with the X-ray telescopes on-board AstroSat, UVIT is used to study a large variety of objects with arcsecond-level spatial resolution. During the first year of observations, UVIT has obtained images in many filter bands in the wavelength range 130-300 nm over a field of ~28, which are being used to study a variety of hot stars, nebulae, stellar clusters and galaxies.

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“…The drift-corrected angular resolution of UVIT in the FUV and NUV bands are approximately 1.4 arcsec. Tandon et al (2017) provide an overview of the UVIT, its operations and performance.…”

Section: Astrosat Science Instrumentsmentioning

confidence: 99%

Observing Compact Stars with AstroSat

Bhattacharya¹

2017

J Astrophys Astron

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Abstract. This article presents a brief description of India's AstroSat mission which is a powerful space based observatory for compact star research. An account is given of observational constraints and spectral and timing capabilities as realised post-launch. Some preliminary results of observations of the Crab pulsar and an X-ray binary system GX 301-2 are presented to illustrate some of the capabilities of the mission.

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In-orbit Performance of UVIT and First Results

Cited by 77 publications

References 16 publications

Additional Calibration of the Ultraviolet Imaging Telescope on Board AstroSat

Additional Calibration of the Ultraviolet Imaging Telescope on Board AstroSat

Ultraviolet Imaging Telescope on AstroSat

Observing Compact Stars with AstroSat

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