Advertisement

In-orbit Performance of UVIT and First Results

  • S. N. Tandon
  • J. B. Hutchings
  • S. K. Ghosh
  • A. Subramaniam
  • G. Koshy
  • V. Girish
  • P. U. Kamath
  • S. Kathiravan
  • A. Kumar
  • J. P. Lancelot
  • P. K. Mahesh
  • R. Mohan
  • J. Murthy
  • S. Nagabhushana
  • A. K. Pati
  • J. Postma
  • N. Kameswara Rao
  • K. Sankarasubramanian
  • P. Sreekumar
  • S. Sriram
  • C. S. Stalin
  • F. Sutaria
  • Y. H. Sreedhar
  • I. V. Barve
  • C. Mondal
  • S. Sahu
Review

Abstract

The performance of the ultraviolet telescope (UVIT) on-board AstroSat is reported. The performance in orbit is also compared with estimates made from the calibrations done on the ground. The sensitivity is found to be within \(\sim \)15% of the estimates, and the spatial resolution in the NUV is found to exceed significantly the design value of \(1.8^{\prime \prime }\) and it is marginally better in the FUV. Images obtained from UVIT are presented to illustrate the details revealed by the high spatial resolution. The potential of multi-band observations in the ultraviolet with high spatial resolution is illustrated by some results.

Keywords

Ultraviolet astronomy space astronomy ultraviolet telescopes ultraviolet detectors payloads on AstroSat 

Notes

Acknowledgements

UVIT project is a result of collaboration between IIA, Bengaluru; IUCAA, Pune; TIFR, Mumbai; several centres of ISRO; and CSA. Indian Institutions and the Canadian Space Agency have contributed to the work presented in this paper. Several groups from ISAC (ISRO), Bengaluru and IISU (ISRO), Trivandrum have contributed to the design, fabrication and testing of the payload. The Mission Group (ISAC) and ISTRSAC (ISAC) continue to provide support in making observations with, and reception and initial processing of the data. The authors gratefully thank all the individuals involved in the various teams for providing their support to the project from the early stages of the design to launch and observations with it in the orbit.

References

  1. Conroy, C., Gunn, W., White, M. 2009, ApJ, 699, 486.ADSCrossRefGoogle Scholar
  2. Girish V., Tandon S. N., Sriram S., Kumar A., Postma J. 2017, Experimental Astronomy, 43(1), 59–74.ADSCrossRefGoogle Scholar
  3. Geller, A. M., Mathieu, R. D., Harris, H. C., McClure, R. D. 2008, AJ, 135, 2264.Google Scholar
  4. Hutchings, J. B., Postma J., Asquin D., Leahy D. 2007, PASP119, 1152.Google Scholar
  5. Kumar, A. et al. 2012a, Proc. of SPIE, 8443, 84431N.CrossRefGoogle Scholar
  6. Kumar A. et al. 2012b, Proc. of SPIE, 8443, 84434R.CrossRefGoogle Scholar
  7. Landsman, W., Bohlin, R. C., Neff, S. G., O’Connell, R. W., Roberts, M. S., Smith, A. M., Andrew, M., Stecher, T. P. 1998, AJ, 116, 789.Google Scholar
  8. Martin, D. C. et al. 2005, ApJ, 619, L1.ADSCrossRefGoogle Scholar
  9. Mason, K. O. et al. 2001, A&A, 365, L36.ADSCrossRefGoogle Scholar
  10. Morrissey, P. et al. 2007, Ap J Suppl. Series, 173, 682.ADSCrossRefGoogle Scholar
  11. Oke, J. B. 1974, ApJS, 27, 21.ADSCrossRefGoogle Scholar
  12. Pati, A. K. 1999, BASI, 27, 295.Google Scholar
  13. Pati, A. K., Mahesh, P. K., Nagabhusan, S., Subramanian, V. K. 2003, BASI, 31, 479.ADSGoogle Scholar
  14. Postma, J., Hutchings, J. B., Leahy, D. 2011, PASP, 123, 833.ADSCrossRefGoogle Scholar
  15. Rao, N. K. 2003, BASI, 31, 249.ADSGoogle Scholar
  16. Roming, P. W. A. et al. 2005, Space Sci Rev, 120, 95.ADSCrossRefGoogle Scholar
  17. Sarajedini, A., von Hippel, T., Kozhurina-Platais, V., Demarque, P. 1999, AJ, 118, 2894.Google Scholar
  18. Schiavon et al. 2012, AJ, 143, 121.Google Scholar
  19. Srivastava, M. K., Prabhudesai S. M., Tandon, S. N. 2009, PASP, 121, 621.ADSCrossRefGoogle Scholar
  20. Stalin, C. S., Sriram, S., Kumar, A. 2010, Determination of Quantum Efficiency of UVIT Flight Model Detectors, Technical Report Indian Institute of Astrophysics, Bangalore.Google Scholar
  21. Stecher, T. P. et al. 1997, PASP, 109, 584.ADSCrossRefGoogle Scholar
  22. Subramaniam, A. et al. 2016, Proc. SPIE. 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray, 99051F (July 18, 2016) doi: 10.1117/12.2235271 (arXiv:1608.01073).

Copyright information

© Indian Academy of Sciences 2017

Authors and Affiliations

  • S. N. Tandon
    • 1
    • 2
  • J. B. Hutchings
    • 3
  • S. K. Ghosh
    • 4
    • 5
  • A. Subramaniam
    • 2
  • G. Koshy
    • 2
  • V. Girish
    • 6
  • P. U. Kamath
    • 2
  • S. Kathiravan
    • 2
  • A. Kumar
    • 2
  • J. P. Lancelot
    • 2
  • P. K. Mahesh
    • 2
  • R. Mohan
    • 2
  • J. Murthy
    • 2
  • S. Nagabhushana
    • 2
  • A. K. Pati
    • 2
  • J. Postma
    • 7
  • N. Kameswara Rao
    • 2
  • K. Sankarasubramanian
    • 6
  • P. Sreekumar
    • 2
  • S. Sriram
    • 2
  • C. S. Stalin
    • 2
  • F. Sutaria
    • 2
  • Y. H. Sreedhar
    • 2
  • I. V. Barve
    • 2
  • C. Mondal
    • 2
  • S. Sahu
    • 2
  1. 1.Inter University Centre for Astronomy and AstrophysicsPuneIndia
  2. 2.Indian Institute of AstrophysicsBengaluruIndia
  3. 3.Herzberg Institute of AstrophysicsVictoriaCanada
  4. 4.National Centre for Radio AstrophysicsPuneIndia
  5. 5.Tata Institute of Fundametal ResearchColaba, MumbaiIndia
  6. 6.ISRO Satellite CentreBengaluruIndia
  7. 7.Department of Physics and AstronomyUniversity of CalgaryCalgaryCanada

Personalised recommendations