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Browsing by Author "Safonova, M"

Browsing by Author "Safonova, M"

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  • Design and modeling of a tunable spatial heterodyne spectrometer for emission line studies 
    Nirmal, K; Sridharan, R; Sriram, S; Murthy, J; Ambily, S; Safonova, M; Sreejith, A. G; Mathew, J; Mayuresh, Sarpotdar (SPIE--The International Society for Optical Engineering, 2018-04)
    Spatial heterodyne spectroscopy (SHS) is an interferometric technique similar to the Fourier transform spectroscopy with heritage from the Michelson interferometer. An imaging detector is used at the output of an SHS to ...
  • Detection of IMBHs from microlensing in globular clusters 
    Safonova, M; Stalin, C. S (Elsevier, 2010-07)
    Globular clusters have been alternatively predicted to host intermediate-mass black holes (IMBHs) or nearly impossible to form and retain them in their centres. Over the last decade enough theoretical and observational ...
  • Detection of IMBHs from microlensing in globular clusters 
    Safonova, M; Rahvar, S (Cambridge University Press, 2007-04)
    Globular clusters have been long predicted to host intermediate-mass black holes (IMBHs) in their centres. The growing evidence that some/all Galactic globular clusters (GCs) could harbour middle range (102 – 104Mxs2299) ...
  • Detection of IMBHs from microlensing in globular clusters 
    Safonova, M; Rahvar, S; Bond, I; Hearnshaw, J; Stalin, C. S (American Institute of Physics, 2008-10)
    Globular clusters have been long predicted to host intermediate-mass black holes (IMBHs) in their centres. The growing evidence that some/all Galactic globular clusters (GCs) could harbour middle range (10/sup2-10/sup4 ...
  • Development of Data Acquisition Methods for an FPGA-Based Photon Counting Detector 
    Ambily, S; Mayuresh, Sarpotdar; Mathew, J; Sreejith, A. G; Nirmal, K; Prakash, A; Safonova, M; Murthy, J (World Scientific Publishing Co., 2017-03)
    MCP-based detectors are widely used in the ultraviolet (UV) region due to their low noise levels, high sensitivity and good spatial and temporal resolution. We have developed a compact near-UV (NUV) detector for highaltitude ...
  • Editorial: Terrestrial analogues of extraterrestrial environments: Assessing habitability and biosignatures preservation 
    Clarke, Jonathan; Safonova, M; Sivaram, C; Pandey, Siddharth; Blank, Jennifer G. (Frontiers, 2022-11)
  • Extrapolating SMBH correlations down the mass scale: the case for IMBHs in globular clusters 
    Safonova, M; Shastri, P (Springer, 2010-01)
    Empirical evidence for both stellar mass black holes (M (aEuro cent)< 10(2) M (aS (TM))) and supermassive black holes (SMBHs, M (aEuro cent)> 10(5) M (aS (TM))) is well established. Moreover, every galaxy with a bulge ...
  • Galaxy Forum South America-Argentina 2020 
    Durst, S; Safonova, M; Paolantonio, S; Colazo, M. E; Li, G (Cambridge University Press on behalf of International Astronomical Union, 2021-12)
    Galaxy Forum (GF) South America 2020, was held virtually on December 8, 2020 on the opening eve of IAU 367 by the International Lunar Observatory Association (ILOA Hawai’i) with the support of the Instituto de Tecnolog´ıas ...
  • A generic FPGA-based detector readout and real-time image processing board 
    Mayuresh, Sarpotdar; Mathew, J; Safonova, M; Murthy, J (SPIE--The International Society for Optical Engineering, 2016-08)
    For space-based astronomical observations, it is important to have a mechanism to capture the digital output from the standard detector for further on-board analysis and storage. We have developed a generic (application- ...
  • Gravitational Lensing and Microlensing in Clusters: Clusters as Dark Matter Telescopes 
    Safonova, M (Societe Royale des Sciences de Liege, 2018-04)
    Gravitational lensing is brightening of background objects due to deflection of light by foreground sources. Rich clusters of galaxies are very effective lenses because they are centrally concentrated. Such natural Gravitational ...
  • High-altitude ballooning programme at the Indian Institute of Astrophysics 
    Akshata Nayak; Sreejith, A. G; Safonova, M; Murthy, J (Indian Academy of Sciences, 2013-03-25)
    Recent advances in balloons and in electronics have made possible scientific payloads at costs accessible to university departments. The primary purpose of high-altitude ballooning programme is to test low-cost ultraviolet ...
  • The Indo-Russian UV Spectrograph Project for the Chinese Space Station (SING) 
    Sachkova, M. E; Bharat Chandra; Shanti Prabha, C; Prakash, Ajin; Binukumar, G; Safonova, M; Rai, Richa; Mohan, Rekhesh; Murthy, J; Shmagin, V. E (Springer Nature, 2021-12)
    The ultraviolet wavelength range (90–300 nm) is one of the most important parts of the electromagnetic spectrum for astrophysicists. The success of the GALEX and ASTROSAT/UVIT missions has given a new view on the ultraviolet ...
  • Investigating the in-flight performance of the UVIT payload on AstroSat 
    Rahna, P. T; Murthy, J; Safonova, M; Sutaria, F. K; Gudennavar, S. B; Bubbly, S. G (Oxford University Press on behalf of the Royal Astronomical Society, 2017-11)
    We have studied the performance of the Ultraviolet Imaging Telescope payload on AstroSat and derived a calibration of the far-ultraviolet (FUV) and near-ultraviolet (NUV) instruments on board. We find that the sensitivity ...
  • JUDE (Jayant’s UVIT Data Explorer) pipeline user manual 
    Rahna, P. T; Murthy, J; Safonova, M (Indian Academy of Sciences, 2021-10)
    We have written a reference manual to use JUDE (Jayant’s UVIT Data Explorer) data pipeline software for processing and reducing the Ultraviolet Imaging Telescope (UVIT) Level 1 data into event lists and images—Level 2 ...
  • JUDE: an ultraviolet imaging telescope pipelineâ 
    Murthy, J; Rahna, P. T; Sutaria, F. K; Safonova, M; Gudennavar, S. B; Bubbly, S. G (Elsevier B.V, 2017-07)
    The Ultraviolet Imaging Telescope (UVIT) was launched as part of the multi-wavelength Indian AstroSat mission on 28 September, 2015 into a low Earth orbit. A 6-month performance verification (PV) phase ended in March ...
  • Large scale extinction maps with UVIT 
    Ravichandran, S; Preethi, K; Safonova, M; Murthy, J (Springer, 2013-04)
    The Ultraviolet Imaging Telescope (UVIT) is scheduled to be launched as a part of the ASTROSAT satellite. As part of the mission planning for the instrument we have studied the efficacy of UVIT observations for interstellar ...
  • Low-cost Raspberry Pi star sensor for small satellites 
    Bharat Chandra, P; Sarpotdar, Mayuresh; Binukumar, G; Rai, Richa; Mohan, Rekhesh; Mathew, Joice; Safonova, M; Murthy, J (SPIE-Society of Photo-Optical Instrumentation Engineers, 2022-07)
    We present a low-cost Raspberry Pi-based star sensor StarberrySense using commercial-off-the-shelf components, developed and built for applications in small satellites and CubeSat-based missions. A star sensor is one of ...
  • The M31 pixel lensing plan campaign: macho lensing and self-lensing signals 
    Novati, S. C; Bozza, V; Bruni, I; Dall'Ora, M; Paolis, F. D; Dominik, M; Gualandi, R; Ingrosso, G; Jetzer, P; Mancini, L; Nucita, A; Safonova, M; Scarpetta, G; Sereno, M; Strafella, F; Subramaniam, A; Gould, A (IOP Publishing, 2014-03-10)
    We present the final analysis of the observational campaign carried out by the PLAN (Pixel Lensing Andromeda) collaboration to detect a dark matter signal in form of MACHOs through the microlensing effect. The campaign ...
  • Measurements of Gondola Motion on a Stratospheric Balloon Flight 
    Safonova, M; Nirmal, K; Sreejith, A.G.; Satpodar, Mayuresh; Suresh, Ambily; Prakash, A; Mathew, Joice; Murthy, J; Anand, D; Karpardhi, B.V.N.; Suneel Kumar, B; Kulkarni, P.M. (Indian Institute of Astrophysics, 2016)
    Balloon experiments are an economically feasible method of conducting observations in astron- omy that are not possible from the ground. The astronomical payload may include a telescope, a detector, and a pointing/stabilization ...
  • The near ultraviolet transient surveyor (NUTS): An ultraviolet telescope to observe variable sources 
    Ambily, S; Sarpotda, Mayuresh; Mathew, Joice; Binukumar, G; Sreejith, A. G; Nirmal, K; Murthy, J; Safonova, M; Mohan, Rekhesh; Aggarval, Vinod Kumar; Nagabhushanam, S; Jeeragal, Sachin (Springer, 2022-08)
    Observing the ultraviolet (UV) sky for time-varyiable phenomena is one of the many exciting science goals that can be achieved by a relatively small aperture telescope in space. The Near Ultraviolet Transient Surveyor ...

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