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Browsing Publications of Astronomical Society of India by Author "Pandey, A. K"

Browsing Publications of Astronomical Society of India by Author "Pandey, A. K"

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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 ...
  • Anomalous reddening law in the galactic giant H II region NGC 3603 
    Pandey, A. K; Ogura, K (Astronomical Society of India, 1998)
  • BVRI CCD photometric standards in the field of GRB 990123 
    Nilakshi; Yadav, R. K. S; Mohan, V; Pandey, A. K; Sagar, R (Astronomical Society of India, 1999)
    The CCD magnitudes in Johnson BV and Cousins RI photometric passbands are determined for 18 stars in the field of GRB 990123. These mesurements can be used in carrying out precise CCD photometry of the optical transient ...
  • CCD photometry of galactic open star clusters - V. King 7 
    Durgapal, A. K; Pandey, A. K; Mohan, V (Astronomical Society of India, 1997)
    CCD observations of the open cluster King 7 and two nearby fields have been made in the UBVRI passbands down to V ~ 20.0 mag. From the colour-colour diagram the reddening is estimated to be 1.25mag. Comparison of the ...
  • 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)
  • CCD photometry of the galactic open star clusters. I - King 10 
    Mohan, V; Pandey, A. K; Paliwal, D. C; Sagar, R; Mahra, H. S (Astronomical Society of India, 1992)
    CCD photometry of the open cluster King 10 has been carried out in the UBVRI photometric passbands down to V of about 19.5 mag. The reddening for the cluster region is found to be variable. A distance of 3.2 kpc has been ...
  • CCD photometry of the open cluster King 5 
    Durgapal, A. K; Pandey, A. K; Mohan, V (Astronomical Society of India, 1998)
  • CCD photometry of the unstudied galactic star clusters Be 10, Be 67 and To 5 
    Lata, S; Mohan, V; Pandey, A. K; Sagar, R (Astronomical Society of India, 2004-03)
    We present the broad band Johnson U BV and Cousins RI CCD photometric observations for open clusters Be 10, Be 67 and To 5. So far no photometric study of these clusters is published. The colour-magnitude diagrams indicate ...
  • Effect of mass segregation on mass function of young open clusters 
    Pandey, A. K; Mahra, H. S; Sagar, R (Astronomical Society of India, 1992)
    The effect of mass segregation on cluster mass function has been studied and it is found that the slope of the mass function is steeper in the outer part of the open clusters. Since derived dynamical relaxation time is ...
  • Emission from the head of comet P/Halley during post-perihelion 
    Goraya, P. S; Rautela, B. S; Sanwal, B. B; Pandey, A. K; Duggal, H. K (Astronomical Society of India, 1996)
    Spectral scans of the head of periodic comet Halley (1982i)covering the wavelength range λλ 320 - 700 nm, are presented for five nights during the months of April an May, 1986. These observations were made when the ...
  • GRB 000301C with peculiar afterglow emission 
    Sagar, R; Mohan, V; Pandey, S. B; Pandey, A. K; Stalin, C. S; Castro-Tirado, A. J (Astronomical Society of India, 2000)
    The CCD magnitudes in Johnson V and Cousins R and I photometric passbands are determined for GRB 000301C afterglow starting ~ 1.5 day after the γ - ray burst. In fact we provide the earliest optical observations for this ...
  • 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 ...
  • The Occulatation of Hyd - 20/sup0/51695 by Uranus on 1982 May 1 
    Pandey, A. K; Mahra, H. S; Mohan, V (Astronomical Society of India, 1984-09)
  • The Occultation of BD - 19 4222 by Uranus on 1981 April 26 
    Mahra, H. S; Pandey, A. K; Joshi, U. C; Mohan, V (Astronomical Society of India, 1983-06)
    From the observations of the occultation of BD - 194222 by Uranus on 1981 April 26 the temperature profiles of the Uranian upper atmosphere have been obtained. The mean temperature of the upper atmosphere of Uranus in the ...
  • Open Star Clusters: Star Formation and Structure 
    Pandey, A. K (Astronomical Society of India, 2003)
    Observational evidences indicate that the formation of open star clusters has been efficient throughout the life of our Galaxy. As a consequence, we find open clusters with ages ranging from a few Myr to few Gyr. This makes ...
  • Optical follow up of the GRB 990123 sources from UPSO, Naini Tal 
    Sagar, R; Pandey, A. K; Mohan, V; Yadav, R. K. S; Nilakshi; Bhattacharya, D; Castro-Tirado, A. J (Astronomical Society of India, 1999)
    The CCD magnitudes in Johnson $BV$ and Cousins $R$ photometric passbands are determined for the optical transient of GRB 990123. These observations have been taken approximately 12 hours after trigger of the gamma-ray ...
  • Optical follow-up of GRB afterglows from UPSO, Naini Tal 
    Pandey, S. B; Sagar, R; Mohan, V; Pandey, A. K; Bhattacharya, D; Castro-Tirado, A. J (Astronomical Society of India, 2001)
    Successful optical photometric observations of five GRB afterglows namely GRB 990123, GRB 991208, GRB 991216, GRB 000301c and GRB 000926 have been carried out from State Observatory Naini Tal till 2000. The results and ...
  • A photometric study of the open cluster King 7 
    Durgapal, A. K; Mohan, V; Pandey, A. K; Mahra, H. S (Astronomical Society of India, 1996)

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