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  • SN 2017hpa: a carbon-rich Type Ia supernova 
    Anirban Dutta; Singh, A; Anupama, G. C; Sahu, D. K; Brajesh Kumar (Oxford University Press on behalf of the Royal Astronomical Society, 2021-05)
    We present the optical (UBVRI) and ultraviolet (Swift-Ultraviolet and Optical Telescope) photometry, and optical spectroscopy of Type Ia supernova SN 2017hpa. We study broad-band ultraviolet (UV)+optical light curves and ...
  • SN 2018gj: A Short Plateau Type II Supernova with Persistent Blueshifted Ha Emission 
    Teja, Rishabh Singh; Singh, Avinash; Sahu, D. K; Anupama, G. C; Kumar, Brajesh; Nakaoka, Tatsuya; Kawabata, Koji S; Yamanaka, Masayuki; Takey, Ali; Kawabata, Miho (American Astronomical Society, 2023-09-10)
    We present an extensive, panchromatic photometric (UV, optical, and near-IR) and low-resolution optical spectroscopic coverage of a Type IIP supernova SN 2018gj that occurred on the outskirts of the host galaxy NGC 6217. ...
  • SN 2018hna: 1987A-like supernova with a signature of shock breakout 
    Singh, A; Sahu, D. K; Anupama, G. C; Brajesh Kumar; Harsh Kumar; Yamanaka, Masayuki; Baklanov, Petr V; Tominaga, Nozomu; Blinnikov, Sergei. I; Maeda, Keiichi; Anirban, D; Bhalerao, Varun; Ramya, M. Anche; Barway, Sudhanshu; Akitaya, Hiroshi; Nakaoka, Tatsuya; Kawabata, Miho; Kawabata, Koji. S; Sasada, Mahito; Takagi, Kengo; Maehara, Hiroyuki; Isogai, Keisuke; Kino, Masaru; Taguchi, Kenta; Nagao, Takashi (IOP Publishing, 2019-09-10)
    High-cadence ultraviolet, optical, and near-infrared photometric and low-resolution spectroscopic observations of the peculiar Type II supernova (SN) 2018hna are presented. The early-phase multiband light curves (LCs) ...
  • SN 2020ank: a bright and fast-evolving H-deficient superluminous supernova 
    Amit Kumar; Brajesh Kumar; Pandey, S. B; Sahu, D. K; Singh, A; Anupama, G. C; Aryan, Amar; Gupta, Rahul; Anirban Dutta; Misra, K (Oxford University Press on behalf of the Royal Astronomical Society, 2021-04)
    We investigate the observational properties of a hydrogen-deficient superluminous supernova (SLSN) SN 2020ank (at z = 0.2485), with the help of early phase observations carried out between –21 and +52 d since g-band maximum. ...
  • SN 2020jfo: A Short-plateau Type II Supernova from a Low-mass Progenitor 
    Teja, Rishabh Singh; Singh, A; Sahu, D. K; Anupama, G. C; Kumar, Brajesh; Nayana, A. J (American Astronomical Society, 2022-05-01)
    We present spectroscopic and photometric observations of the Type IIP supernova, SN 2020jfo, in ultraviolet and optical wavelengths. SN 2020jfo occurred in the spiral galaxy M61 (NGC 4303), with eight observed supernovae ...
  • SN 2020sck: Deflagration in a Carbon-Oxygen White Dwarf 
    Dutta, Anirban; Sahu, D. K; Anupama, G. C; Joharle, Simran; Kumar, Brajesh; Nayana, A. J; Singh, Avinash; Kumar, Harsh; Bhalerao, Varun; Barway, Sudhanshu (American Astronomical Society, 2022-02-01)
    We present optical UBVRI photometry and low-to-medium resolution spectroscopic observations of type Iax supernova SN 2020sck spanning −5.5 days to +67 days from maximum light in the B-band. From the photometric analysis ...
  • SN 2020udy: A New Piece of the Homogeneous Bright Group in the Diverse Iax Subclass 
    Singh, Mridweeka; Sahu, D. K; Barna, Barnabas; Gangopadhyay, Anjasha; Dastidar, Raya; Teja, Rishabh Singh; Misra, Kuntal; Howell, D. Andrew; Wang, Xiaofeng; Mo, Jun; Yan, Shengyu; Hiramatsu, Daichi; Pellegrino, Craig; Anupama, G. C; Joshi, Arti; Bostroem, K. Azalee; Burke, Jamison; McCully, Curtis; Rama Subramanian, V; Li, Gaici; Xi, Gaobo; Li, Xin; Li, Zhitong; Srivastav, Shubham; Im, Hyobin; Dutta, Anirban (American Astronomical Society, 2024-04-10)
    We present optical observations and analysis of the bright type Iax supernova SN 2020udy hosted by NGC 0812. The evolution of the light curve of SN 2020udy is similar to that of other bright type Iax SNe. Analytical modeling ...
  • SN1987A : Supernova Remnant Prospects 
    Velusamy, T (Indian Institute of Astrophysics, 1988)
  • SN2007rw- A Type IIL Supernova 
    Arora, S; Sahu, D. K; Anupama, G. C (Astronomical Society of the Pacific, 2011-12)
    We present BVRI photometry and medium resolution spectroscopy of the supernova SN2007rw during ˜ 1 week to ˜ 7 months after discovery. This supernova was classified as a type IIb event, however, based on our analysis we ...
  • SN2019wxt: An Ultrastripped Supernova Candidate Discovered in the Electromagnetic Follow-up of a Gravitational Wave Trigger 
    Shivkumar, Hinna; Jaodand, Amruta D.; Balasubramanian, Arvind; Fremling, Christoffer; Corsi, Alessandra; Tzanidakis, Anastasios; Nissanke, Samaya; Kasliwal, Mansi; Brightman, Murray; Raaijmakers, Geert; Madsen, Kristin Kruse; Harrison, Fiona; Carbone, Dario; Nayana, A. J; Désert, Jean-Michel; Andreoni, Igor (American Astronomical Society, 2023-07-20)
    We present optical, radio, and X-ray observations of a rapidly evolving transient SN2019wxt (PS19hgw), discovered during the search for an electromagnetic counterpart to the gravitational-wave (GW) trigger S191213g. Although ...
  • The society's conversazione 
    Letton, C. T (1913-02)
  • SOFIA Observations of 30 Doradus. II. Magnetic Fields and Large-scale Gas Kinematics 
    Tram, Le Ngoc; Bonne, Lars; Hu, Yue; Lopez-Rodriguez, Enrique; Guerra, Jordan A; Lesaffre, Pierre; Gusdorf, Antoine; Hoang, Thiem; Lee, Min-Young; Lazarian, Alex; Andersson, B-G; Coude, Simon; Archana Soam; Vacca, William D; Lee, Hyeseung; Gordon, Michael (American Astronomical Society, 2023-03-20)
    The heart of the Large Magellanic Cloud, 30 Doradus, is a complex region with a clear core-halo structure. Feedback from the stellar cluster R136 has been shown to be the main source of energy creating multiple parsecscale ...
  • A soft actuator for prototype segmented mirror telescope 
    Prasanna, Deshmukh; Parihar, P. S; Mishra, Deepta Sundar; Prakash, Ajin; Kemkar, P. M. M (SPIE-The International Society for Optical Engineering, 2016-07)
    The Segmented Mirror Telescopes (SMT) are built using small hexagonal mirror segments placed side by side to form a monolithic primary mirror of very large size. The effective figure of such a segmented primary mirror is ...
  • Soft X-ray and FUV observations of Nova Her 2021 (V1674 Her) with AstroSat 
    Bhargava, Yash; Dewangan, Gulab Chand; Anupama, G. C; Kamath, U. S; Sonith, L. S; Singh, Kulinder Pal; Drake, J. J; Beardmore, A; Luna, G. J. M; Orio, M; Page, K. L (Published by Oxford University Press on behalf of Royal Astronomical Society, 2024-02)
    Nova Her 2021 or V1674 Her was one of the fastest novae to be observed so far. We report here the results from our timing and spectral studies of the source observed at multiple epochs with AstroSat. We report the detection ...
  • Soft x-ray imager using multilayer mirror optics for martian exospheric studies 
    Panini, S. S; Narendranath, S; Sreekumar, P; Athiray, P. S (2010-07)
    Planetary X ray measurements in the past have yielded valuable science in several areas such as the surface chemistry, polar auroras, magnetospheres and solar wind interaction with the exosphere. X-ray ...
  • Soft X-ray Imaging Telescope on ASTROSAT 
    Singh, K. P (Astronomical Society of India, 2002-09)
    A Soft X-ray focusing Telescope (SXT) with an X-ray sensitive CCD camera at the focal plane is being developed for the ASTROSAT. Made from conical foil mirrors with a CeD detector in the focal plane SXT will have a ...
  • Soft X-ray properties of a complete sample of QSOs 
    Dewangan, G. C; Singh, K. P (Astronomical Society of India, 2001)
    In order to study systematically the soft X-ray emission of AGNs, we have analyzed ROSAT PSPC spectra of 22 QSOs. The QSOs form a complete sample with soft X-ray flux ??1.4 x 10-14 erg cm-2 s-1 in the energy band of 0.1-2.0 ...
  • Software for a simple two-axis numerical control system 
    Santhanam, P; Panchapakesan, S; Kirshnan, A (Elsevier, 1982-08)
    The principle of a two-axis NC (numerical control) wire EDM (electrical discharge machine) machine is described. A suitable programming language with appropriate commands for this application is presented. A software system ...
  • A software package for evaluating the performance of a star sensor operation 
    Mayuresh, Sarpotdar; Mathew, J; Sreejith, A. G; Nirmal, K; Ambily, S; Prakash, A; Safonova, M; Murthy, J (Springer, 2017-02)
    We have developed a low-cost off-the-shelf component star sensor (StarSense) for use in minisatellites and CubeSats to determine the attitude of a satellite in orbit. StarSense is an imaging camera with a limiting magnitude ...
  • A Sol-Gel Derived AR coating on Ophthalmic Lenses in the Visible Region 
    Biswas, P. K; Atta, A. K; Ganguli, D (Indian Institute of Astrophysics, Bangalore, 1991)
    Deposition of antireflective coating in the visible region by the sol-gel spinning technique has been described in this communication. A 2-layer design, centred at 550 nm, was used. The design can be denoted as Glass/H/L/Air ...

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