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Browsing by Author "Safonova, M"

Browsing by Author "Safonova, M"

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  • Opto-mechanical assembly and ground calibration of LUCI 
    Mathew, J; Nair, B. G; Sriram, S; Kamath, P. U; Prakash, A; Mayuresh, Sarpotdar; Ambily, S; Nirmal, K; Sreejith, A. G; Safonova, M; Murthy, J; Brosch, N (SPIE--The International Society for Optical Engineering, 2018-08-20)
    The Lunar Ultraviolet Cosmic Imager (LUCI) is an innovative all-spherical mirrors telescope, proposed to fly as a scientific UV imaging payload on a lunar mission in collaboration with Indian Aerospace Company-TeamIndus, ...
  • Planets in the early Universe 
    Shchekinov, Y. A; Safonova, M; Murthy, J (Springer, 2013-07)
    Several planets have recently been discovered around stars that are old and metal-poor, implying that these planets are also old, formed in the early Universe together with their hosts. The canonical theory suggests that ...
  • Pointing system for the balloon-borne astronomical payloads 
    Nirmal, K; Sreejith, A. G; Mathew, J; Mayuresh, Sarpotdar; Ambily, S||Prakash, A; Safonova, M; Murthy, J (SPIE-The International Society for Optical Engineering, 2016-12)
    We describe the development and implementation of a light-weight, fully autonomous 2-axis pointing and stabilization system designed for balloon-borne astronomical payloads. The system is developed using offthe-shelf ...
  • Postulating exoplanetary habitability via a novel anomaly detection method 
    Sarkar, Jyotirmoy; Bhatia, Kartik; Saha, Snehanshu; Safonova, M; Sarkar, Santonu (Oxford University Press on behalf of Royal Astronomical Society, 2022-03)
    A profound shift in the study of cosmology came with the discovery of thousands of exoplanets and the possibility of the existence of billions of them in our Galaxy. The biggest goal in these searches is whether there are ...
  • Predicting UV sky for future UV missions 
    Safonova, M; Mohan, Rekhesh; Sreejith, A. G; Murthy, J (Elsevier, 2013-02)
    Software simulators are now widely used in all areas of science, especially in application to astronomical missions: from instrument design to mission planning, and to data interpretation. We present a simulator to model ...
  • Prospect for UV observations from the Moon 
    Safonova, M; Mathew, J; Mohan, Rekhesh; Sreejith, A. G; Murthy, J; Brosch, N; Kappelmann, N; Sharma, A; Narayan, R (Springer, 2014-10)
    Space astronomy in the last 40 years has largely been done from spacecraft in low Earth orbit (LEO) for which the technology is proven and delivery mechanisms are readily available. However, new opportunities are arising ...
  • Prospect for UV observations from the Moon. II. Instrumental design of an ultraviolet imager LUCI 
    Mathew, J; Prakash, A; Mayuresh, Sarpotdar; Sreejith, A. G; Nirmal, K; Ambily, S; Safonova, M; Murthy, J; Brosch, N (Springer, 2017-02)
    We present a design for a near-ultraviolet (NUV) imaging instrument which may be flown on a range of available platforms, including high-altitude balloons, nanosatellites, or space missions. Although all current UV space ...
  • Prospect for UV observations from the moon. III. assembly and ground calibration of lunar ultraviolet cosmic imager (LUCI) 
    Mathew, J; Nair, B. G; Safonova, M; Sriram, S; Prakash, A; Mayuresh, Sarpotdar; Ambily, S; Nirmal, K; Sreejith, A. G; Murthy, J; Kamath, P. U; Kathiravan, S; Prasad, B. R; Brosch, Noah; Kappelmann, Norbert; Gadde, Nirmal Suraj; Narayan, Rahul (Springer, 2019-03)
    The Lunar Ultraviolet Cosmic Imager (LUCI) is a near-ultraviolet (NUV) telescope with all-spherical mirrors, designed and built to fly as a scientific payload on a lunar mission with Team Indus—the original Indian entry to ...
  • Prospects for observations of transient UV Events with the TAUVEX UV observatory 
    Safonova, M; Sivaram, C; Murthy, J (Springer, 2008-11)
    Transient events have posed special problems in astronomy because of the intrinsic difficulty of their detection, and a new class of observatories such as the Pan-STARRS and LSST are coming up specifically to observe these ...
  • Quantifying the classification of exoplanets: in search for the right habitability metric 
    Safonova, M; Mathur, Archana; Basak, Suryoday; Bora, Kakoli; Agrawal, Surbhi (Jointly published by EDP Sciences, Società Italiana di Fisica and Springer Berlin Heidelberg, 2021-09)
    What is habitability? Can we quantify it? What do we mean under the term habitable or potentially habitable planet? With estimates of the number of planets in our Galaxy alone running into billions, possibly a number greater ...
  • A Raspberry Pi-based attitude sensor 
    Sreejith, A. G; Mathew, J; Mayuresh, Sarpotdar; Mohan, Rekhesh; Akshata Nayak; Safonova, M; Murthy, J (World Scientific Publishing Co., 2014-11)
    We have developed a lightweight low-cost attitude sensor, based on a Raspberry Pi, built with readily available commercial components. It can be used in experiments where weight and power are constrained, such as in ...
  • Search for low-mass objects in the globular cluster M4. I. detection of variable stars 
    Safonova, M; Mkrtichian, D; Hasan, P; Sutaria, F. K; Brosch, N; Gorbikov, E; Joseph, P (IOP Publishing, 2016-02)
    With every new discovery of an extrasolar planet, the absence of planets in globular clusters ( GCs ) becomes more and more conspicuous. Null detection of transiting hot Jupiters in GCs 47 Tuc, ω Cen, and NGC 6397 ...
  • Searching for IMBHs in globular clusters 
    Safonova, M (World Scientific and Engineering Academy and Society, 2010)
    Globular clusters have been alternatively predicted to host intermediate-mass black holes (IMBFIs) or nearly impossible to form and retain them in their centres. Over the last decade enough theoretical and observational ...
  • Simultaneous X-ray/UV Observations of Ultraluminous X-ray Source Holmberg II X-1 with Indian Space Mission Astrosat 
    Vinokurov, A; Atapin, K; Bordoloi, O. P; Sarkisyan, A; Kashyap, U; Chakraborty, M; Rahna, P. T; Kostenkov, A; Solovyeva, Y; Fabrika, S; Safonova, M; Gogoi, R; Sutaria, F. K; Murthy, J (Springer, 2022-09)
    We present the results of eight epochs of simultaneous UV and X-ray observations of the highly variable ultraluminous X-ray source (ULX) Holmberg II X-1 with AstroSat—Indian multiwavelength space satellite. During the ...
  • SN 2013ej: a type IIL supernova with weak signs of interaction 
    Bose, S; Sutaria, F. K; Kumar, B; Duggal, C; Misra, K; Brown, P. J; Singh, M; Dwarkadas, V; York, D. G; Chakraborti, S; Chandola, H. C; Dahlstrom, J; Ray, A; Safonova, M (IOP Publishing, 2015-06)
    We present optical photometric and spectroscopic observations of SN 2013ej. It is one of the brightest Type II supernovae (SNe II) exploded in a nearby (∼10 Mpc) galaxy, NGC 628. The light-curve characteristics are similar ...
  • 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 ...
  • The Solar Ultraviolet Imaging Telescope on-board Aditya-L1 
    Murthy, J; Rahna, P. T; Sutaria, F. K; Safonova, M; Gudennavar, S. B; Bubbly, S. G (Current Science Association, 2017-08)
    The Solar Ultraviolet Imaging Telescope (SUIT) is an instrument onboard the Aditya-L1 spacecraft, the first dedicated solar mission of the Indian Space Research Organization (ISRO), which will be put in a halo orbit at the ...
  • Spectroscopic Investigation of Nebular Gas (SING): a dedicated NUV spectrograph to study extended objects 
    Bharat Chandra; Nair, B. G; Suresh, Ambily; Prabha, C. S; Mathew, J; Nirmal, K; Sarpotdar, Mayuresh; Mohan, R; Safonova, M; Sriram, S; Murthy, J (SPIE--The International Society for Optical Engineering, 2019-01)
    SING is a near ultraviolet (NUV) spectrograph with a size close to 6U CubeSat form-factor. The spectrograph operates in the wavelength range from 1800 Å to 3000 Å, with a spectral resolution of 2 Å at the central wavelength. ...
  • Spectroscopic Investigation Of Nebular Gas (SING): a dedicated NUV spectrograph to study extended objects from a stable space platform 
    Chandra, B; Sachkov, Mikhail; Shanti Prabha, C; Prakash, A; Nair, B. G; Safonova, M; Rai, R; Mohan, Rekhesh; Murthy, J; Shmagin, Vladimir (SPIE-The International Society for Optical Engineering, 2020-12)
    One of the most exciting parts of the astrophysical spectrum is the ultraviolet, with a greater density of absorption and emission lines than any other part of the electromagnetic spectra. Our primary science objective ...
  • TAUVEX flight calibrations: Plans and challenges 
    Safonova, M; Shalima, P; Murthy, J (Astronomical Society of India, 2009-06)
    The operational tasks for the Performance Verification (PV) and calibration phase in the first year of TAUVEX operation are presented. The new challenges regarding the possible reduction in sensitivity are outlined and are ...

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