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Browsing Publications of Astronomical Society of India by Author "Bhatt, B. C"

Browsing Publications of Astronomical Society of India by Author "Bhatt, B. C"

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  • The age distribution of open clusters as a function of Trumpler's classification 
    Bhatt, B. C; Pandey, A. K; Mahra, H. S (Astronomical Society of Indian, 1989-03)
    The age distribution of open clusters is studied as a function of Trumpler's central concentration and range in brightness classes. For different Trumpler's classes within 1 kpc, it is shown that the observed distribution ...
  • Atmospheric Precipitable Water Vapour Over Manora-Peak Naini-Tal 
    Bhatt, B. C; Mahra, H. S (Astronomical Society of Indian, 1987)
    Precipitable water vapour is one of the variable atmospheric constituents and its short-term and seasonal variations may affect the infrared photometric observations. From the analysis of the measurements, made at Manora ...
  • CCD photometry of galactic open star clusters -- 2: NGC 7419 
    Bhatt, B. C; Pandey, A. K; Mohan, V; Mahra, H. S; Paliwal, D. C (Astronomical Society of India, 1993-03)
    CCD photometric observations of open cluster NGC 7419 in UBVRI passbands have been made down to V = 19.5 mag. Reddening across the cluster region is found to be variable. The mean visual absorption of 5.30 mag and a distance ...
  • CCD photometry of galactic open star clusters IV. NGC 366 
    Pandey, A. K; Bhatt, B. C; Mohan, V; Paliwal, D. C; Mahra, H. S (Astronomical Society of India, 1994)
  • CCD photometry of galactic open star clusters-III. NGC 1931 
    Bhatt, B. C; Pandey, A. K; Mahra, H. S; Paliwal, D. C (Astronomical Society of India, 1994)
  • Multi-observatory observations of night-side of Venus at 2.3 micron - atmospheric circulation from tracking of cloud features 
    Limaye, S; Warell, J; Bhatt, B. C; Fry, P. M; Young, E. F (Astronomical Society of India, 2006)
    Observations of Venus were made during 3 May to 11 May 2004 (117.4o - 125.7o phase angle) and 3 July to 10 July, 2004 (132.5o - 125.1o phase angle) from the 1.2-metre Mt. Abu Telescope at Gurushikhar, Himalayan Chandra ...
  • Near-infrared JH photometry of young open cluster Be 59 
    Sharma, S; Ogura, K; Pandey, A. K; Ojha, D. K; Bhatt, B. C (Astronomical Society of India, 2007)
    We present near-infrared J H photometry and optical slitless spectroscopy of stars in the field of the young cluster Be 59. The J /(J- H )colour-magnitude diagram of the cluster yields a distance modulus of (m - M )0= 10.0 ...
  • Night sky at the Indian Astronomical Observatory during 2000-2008 
    Stalin, C. S; Hegde, M; Sahu, D. K; Parihar, P. S; Anupama, G. C; Bhatt, B. C; Prabhu, T. P (Astronomical Society of India, 2008-09)
    This paper presents an analysis of the optical night sky brightness and extinction coefficient measurements in UBVRI at the Indian Astronomical Observatory (IAO), Hanle, during the period 2000–2008. They are obtained from ...
  • Night Sky Extinction Measurements at the Indian Astronomical Observatory, Hanle 
    Parihar, P. S; Sahu, D. K; Bhatt, B. C; Subramaniam, A; Anupama, G. C; Prabhu, T. P (Astronomical Society of India, 2003)
    We present the estimates of the night sky extinction at the Indian Astronomical Observatory. Also presented are the estimates of the night sky brightness. The extinction in the U band at IAO is found to be lower than the ...
  • Optical observations of the bright long duration peculiar GRB 021004 afterglow. 
    Pandey, S. B; Sahu, D. K; Resmi, L; Sagar, R; Anupama, G. C; Bhattacharya, D; Mohan, V; Prabhu, T. P; Bhatt, B. C; Pandey, J. C; Parihar, P. S; Castro-Tirado, A. J (Astronomical Society of India, 2003)
    The CCD magnitudes in Johnson B,V and Cousins R and I photometric passbands are determined for the bright long duration GRB 021004 afterglow from 2002 October 4 to 16 starting ~ 3 hours after the γ - ray burst. Light curves ...
  • Optical photometry of the GRB 010222 afterglow 
    Cowsik, R; Prabhu, T. P; Anupama, G. C; Bhatt, B. C; Sahu, D. K; Ambika, S; Padmakar; Bhargavi, S. G (Astronomical Society of India, 2001)
    The optical afterglow of GRB 010222 was observed using the recently installed 2-m telescope at the Indian Astronomical Observatory, Hanle, and the telescopes at the Vainu Bappu Observatory, Kavalur, beginning ~ 0.6 day ...
  • Site characteristics of The Indian Astronomical Observatory, Hanle 
    Bhatt, B. C; Prabhu, T. P; Anupama, G. C (Astronomical Society of India, 2000)
    A brief summary of site characteristics of Indian Astronomical Observatory, Hanle, Ladakh (altitude 4500 m), is presented based on a survey being carried out since the last four years.
  • UBV CCD standards in two galactic directions-II 
    Mohan, V; Sanwal, B. B; Paliwal, D. C; Pandey, A. K; Bhatt, B. C; Robin, A. C (Astronomical Society of India, 1996)
  • UBV CCD standards near 5C1 radio sources at intermediate galactic latitude I 
    Mohan, V; Ojha, D. K; Bienayme, O; Paliwal, D. C; Pandey, A. K; Robin, A. L; Bhatt, B. C (Astronomical Society of India, 1994)
    We have been doing a photometric and astrometric sample survey programme on Schmidt plates in a few selected directions in the Galaxy with an aim to study galactic stellar populations. In order to calibrate Schmidt plates ...

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