Browsing by Author "Nilakshi"

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  • BVRI CCD photometric standards in the field of GRB 990123 
    Nilakshi; Yadav, R. K. S.; Mohan, V.; Pandey, A. K.; Sagar, R. (1999)
    The CCD magnitudes in Johnson BV and Cousins RI photometric passbands are determined for 18 stars in the field of GRB 990123. These measurements can be used in carrying out precise CCD photometry of the optical transient ...
  • CCD photometry of the galactic open cluster NGC 2309 
    Nilakshi; Pandey, A. K.; Mohan, V. (1998)
    The comparison between the observed HR diagram of the clusters and the isochrones computed by means of evolutionary models provides a test for stellar structure and evolution. To get fundamental information for above ...
  • A comprehensive study of the rich open star cluster NGC 2099 based on deep BV I CCD observations 
    Nilakshi; Sagar, R. (2002)
    The CCD observations of the rich open star cluster NGC 2099 and its surrounding field region have been carried out up to a limiting magnitude of V ∼ 22 mag in B, V and I passbands for the first time. A total of ∼12 000 ...
  • NGC 7654: An interesting cluster to study star formation history 
    Pandey, A. K.; Nilakshi; Ogura, K.; Sagar, R.; Tarusawa, K. (2001)
    CCD UBVIc photometry in a wide field around the open cluster NGC 7654 has been carried out for ∼17 860 stars, down to V ∼ 20. The reddening across the cluster region is found to be variable with E(B −V )min = 0.46 to E(B ...
  • A study of spatial structure of galactic open star clusters 
    Nilakshi; Sagar, R.; Pandey, A. K.; Mohan, V. (2002)
    In order to study the relation between the core and corona in galactic star clusters, the spatial structure of 38 rich open star clusters has been studied using radial density profiles derived from the photometric data of ...

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