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Co-Authors
- M. C. Ramadevi
- S. Seetha
- Dipankar Bhattacharya
- N. Sitaramamurthy
- G. Meena
- M. Ramakrishna Sharma
- Ravi Kulkarni
- V. Chandra Babu
- Kumar
- Brajpal Singh
- Anand Jain
- Reena Yadav
- S. Vaishali
- B. N. Ashoka
- Anil Agarwal
- K. Balaji
- Manoj Kumar
- Prashanth Kulshresta
- Pankaj Agarwal
- Mathew Sebastian
- K. Sankarasubramanian
- Manju Sudhakar
- Anuj Nandi
- Abhijit Avinash Adoni
- Ankur Kushwaha
- Arjun Dey
- Bhuwan Joshi
- V. Girish
- Ishan Tomar
- Kamal Kumar Majhi
- Manjunath Olekar
- Monoj Bug
- Manohar Pala
- Mukund Kumar Thakur
- Rajeev R. Badagandi
- Sarthak Garg
- N. Sridhara
- C. N. Umapathy
- Vinod Kumar Gupta
- Vivek Kumar Agrawal
- B. Yougandar
Journals
Year
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Ravishankar, B. T.
- Scanning Sky Monitor On-Board AstroSat
Abstract Views :263 |
PDF Views:94
Authors
M. C. Ramadevi
1,
S. Seetha
2,
Dipankar Bhattacharya
3,
B. T. Ravishankar
1,
N. Sitaramamurthy
1,
G. Meena
1,
M. Ramakrishna Sharma
1,
Ravi Kulkarni
1,
V. Chandra Babu
1,
Kumar
1,
Brajpal Singh
1,
Anand Jain
1,
Reena Yadav
1,
S. Vaishali
1,
B. N. Ashoka
1,
Anil Agarwal
1,
K. Balaji
4,
Manoj Kumar
5,
Prashanth Kulshresta
5,
Pankaj Agarwal
6,
Mathew Sebastian
6
Affiliations
1 Space Astronomy Group, SSIF, ISITE Campus, Karthik Nagar, Outer Ring Road, ISRO Satellite Centre, Bengaluru 560 037, IN
2 Indian Space Research Organisation Headquarters, Department of Space, Antariksh Bhavan, New BEL Road, Bengaluru 560 231, IN
3 Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Ganeshkhind, Pune 411 007, IN
4 Spacecraft Mechanisms Group, ISAC, Old Airport Road, Vimanapura Post, Bengaluru 560 017, IN
5 Control and Digital Electronics Group, ISAC, Old Airport Road, Vimanapura Post, Bengaluru 560 017, IN
6 Vikram Sarabhai Space Center, Thiruvananthapuram 695 022, IN
1 Space Astronomy Group, SSIF, ISITE Campus, Karthik Nagar, Outer Ring Road, ISRO Satellite Centre, Bengaluru 560 037, IN
2 Indian Space Research Organisation Headquarters, Department of Space, Antariksh Bhavan, New BEL Road, Bengaluru 560 231, IN
3 Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Ganeshkhind, Pune 411 007, IN
4 Spacecraft Mechanisms Group, ISAC, Old Airport Road, Vimanapura Post, Bengaluru 560 017, IN
5 Control and Digital Electronics Group, ISAC, Old Airport Road, Vimanapura Post, Bengaluru 560 017, IN
6 Vikram Sarabhai Space Center, Thiruvananthapuram 695 022, IN
Source
Current Science, Vol 113, No 04 (2017), Pagination: 599-601Abstract
Scanning Sky Monitor (SSM) on-board AstroSat is a wide-field imager to monitor the X-ray sky in the energy band 2.5-10 keV. The primary science objective of SSM is to detect and locate transient X-ray sources in the sky. Once detected the information is to be provided to the astronomical community for follow-up observations to do a more detailed study of the source. Long-term monitoring of known X-ray transient sources is also one of the science objectives of SSM. The instrument constitutes three units of 1D positionsensitive propotional counters with coded masks on each, all three mounted on a platform capable of rotation to scan about 50% of the sky in one full rotation. The angular resolution of each unit in SSM is 12' x 2.5°. Sensitivity of SSM is ~30 milliCrab at 3 sigma in 10 min integration time. This article briefly discusses the instrument and a few early results since the launch of AstroSat.Keywords
AstroSat, Crab, Scanning Sky Monitor, X-Ray Transient Sources.References
- Agrawal, P. C., A broad spectral band Indian Astronomy satellite AstroSat. Adv. Space Res., 2006, 38, 29892994.
- Singh, K. P. et al., AstroSat mission. Proc. SPIE, 2014, 91442T, 9144-100; doi:10.1117/12.2062667.
- Levine, A. M. et al., First results from the All-Sky Monitor on the Rossi X-ray Timing Explorer. ApJ, 1996, 469, L33.
- Seetha, S. et al., The Scanning Sky Monitor (SSM) on AstroSat. Adv. Space Res., 2006, 38, 2995–2998.
- Matsuoka, M. et al., The MAXI mission on the ISS: science and instruments for monitoring All-sky X-ray images. PASJ, 2009, 61, 999.
- Balaji, K., Narendra, S., Nagesh, G., Sridharamurthy, V. and Bhat, N. C., Development of mechanisms for AstroSat. In Proceedings of the 5th National Seminar and Exhibition on Aerospace and Related Mechanisms, ISRO Satellite Centre, Bengaluru, 18–19 November 2005, ARMS-05-MSA-02, pp. 67–73.
- Ramadevi, M. C., Seetha, S., Babu, V. C., Ashoka, B. N. and Sreekumar, P., Optimization of gas proportional counters for Scanning Sky Monitor (SSM) onboard AstroSat. Adv. Space Res., 2006, 38, 3002–3004.
- Ramadevi, M. C. et al., Scanning sky monitor (SSM) on-board AstroSat. Exp. Astron., 2017, doi:10.1007/s10686-017-9536-3.
- Ramadevi, M. C. et al., Early in-orbit performance of Scanning Sky Monitor onboard AstroSat. J. Astrophys. Astr., 2016; doi:12.3456/s78910-011-012-3.
- Ramadevi, M. C. et al., Detection of beta-class variability in black hole source GRS 1915+105 by AstroSat Scanning Sky Monitor. The Astronomer’s Telegram ATel #8185, 2015.
- X-Ray Spectrometers On-Board Aditya-L1 for Solar Flare Studies
Abstract Views :218 |
PDF Views:71
Authors
K. Sankarasubramanian
1,
Manju Sudhakar
1,
Anuj Nandi
1,
M. C. Ramadevi
1,
Abhijit Avinash Adoni
1,
Ankur Kushwaha
1,
Anil Agarwal
1,
Arjun Dey
1,
Bhuwan Joshi
2,
Brajpal Singh
1,
V. Girish
1,
Ishan Tomar
1,
Kamal Kumar Majhi
1,
Kumar
1,
Manjunath Olekar
1,
Monoj Bug
1,
Manohar Pala
1,
Mukund Kumar Thakur
1,
Rajeev R. Badagandi
1,
B. T. Ravishankar
1,
Sarthak Garg
1,
N. Sitaramamurthy
1,
N. Sridhara
1,
C. N. Umapathy
1,
Vinod Kumar Gupta
1,
Vivek Kumar Agrawal
1,
B. Yougandar
1
Affiliations
1 ISITE Campus, ISRO Satellite Centre, Outer Ring Road, Marathahalli, Bengaluru 560 037, IN
2 Udaipur Solar Observatory, Physical Research Laboratory, Udaipur 313 004, IN
1 ISITE Campus, ISRO Satellite Centre, Outer Ring Road, Marathahalli, Bengaluru 560 037, IN
2 Udaipur Solar Observatory, Physical Research Laboratory, Udaipur 313 004, IN
Source
Current Science, Vol 113, No 04 (2017), Pagination: 625-627Abstract
Aditya-L1 mission will carry two high-spectral resolution X-ray spectrometers to study solar flares. The soft X-ray spectrometer will cover the energy range from 1 to 30 keV, while the hard X-ray spectrometer will cover from 10 to 150 keV. These two instruments together will provide opportunities to study the plasma parameters during solar flares as well as acceleration mechanisms of energetic particles during the flaring time.Keywords
Coronal Heating, Solar Flares, X-Ray Spectrometers.References
- Benz, A. O., Flare observations. Living Rev. Sol. Phys., 2017, 14(2), 1–59.
- Hannah, I. G. et al., Microflares and the statistics of X-ray flares. Space Sci. Rev., 2011, 159, 263–300.
- Narendranath, S. et al., Elemental abundances in the solar corona as measured by the X-ray solar monitor onboard Chandrayaan-1. Sol. Phys., 2014, 289, 1585–1595.
- Joshi, B. et al., Pre-flare activity and magnetic reconnection during the evolutionary stages of energy release in a solar eruptive flare. ApJ, 2011, 743, 195–208.
- Rao, A. R. et al., RT-2 detection of quasi-periodic pulsations in the 2009 July 5 solar hard X-ray flare. ApJ, 2010, 714, 1142–1148.
- Yashiro, S. et al., Spatial relationship between solar flares and coronal mass ejections. ApJ, 2008, 673, 1174–1180.
- Chifor, C. et al., The early phases of a solar prominence eruption and associated flare: a multi-wavelength analysis. A&A, 2006, 458, 965–973.
- Warmuth, A. et al., Rapid changes of electron acceleration characteristics at the end of the impulsive phase of an X-class solar flare. ApJ, 2009, 699, 917.
- SoLEXS Team, SoLEXS PDR document, ISRO-ISACADITYA-L1RR-1343, 2016.
- HEL1OS Team, HEL1OS PDR document, ISRO-ISAC-ADITYA-L1RR-1342, 2016.