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Browsing by Author "Parihar, P. S"

Browsing by Author "Parihar, P. S"

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  • 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 ...
  • Spectroscopic survey of ASAS eclipsing variables: search for chromospherically active eclipsing binary stars - I 
    Parihar, P. S; Messina, S; Bama, P; Medhi, B. J; Muneer, S; Velu, C; Ahmad, A (Royal Astronomical Society, 2009-05)
    We have started a spectroscopic survey to identify new chromospherically active components and low-mass pre-main sequence (PMS) stars in recently discovered All Sky Automated Survey (ASAS) eclipsing binaries. In this paper, ...
  • Study on segmentation and alignment related effects in a 10m class telescope 
    Jacob, A; Parihar, P. S; James, Melvin K; Dharmadhikari, Radhika (SPIE-The International Society for Optical Engineering, 2022-08)
    Indian astronomers are aiming to build a large 10m class optical-NIR telescope, equipped with state-of art instruments. After exploring many potential design options, we ended up with two mirror Ritchey-Chretien (RC) type ...
  • An unusual very low-mass high-amplitude pre-main sequence periodic variable 
    Rodríguez-Ledesma, M. V; Mundt, R; Ibrahimov, M; Messina, S; Parihar, P. S; Hessman, F. V; Alves de Oliveira, C; Herbst, W (EDP Sciences, 2012-08)
    Aims. We have investigated the nature of the variability of CHS 7797, an unusual periodic variable in the Orion Nebula Cluster. Methods. An extensive I-band photometric data set of CHS 7797 was compiled between 2004−2010 ...
  • Variable stars in M37 
    Dar, A. A; Parihar, P. S; Saleh, P; Malik, M. A (IOP Publishing, 2018-12)
    The CCD photometric observations of open star cluster M37 (NGC 2099) were carried out up to a limiting magnitude of V ~ 20 in both B and V filters to search for variable stars using a 2k × 4k CCD and the 1.3 m telescope ...

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