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General Relativistic Spectra from Accretion Disks around Rapidly Rotating Neutron Stars
Sudip Bhattacharyya, Dipankar Bhattacharya, Ranjeev Misra +1
We compute spectra from accretion disks around rapidly rotating neutron stars. The full effect of general relativity is considered for the structure calculation of the stars. We ta…
Optical and Radio observations of the bright GRB010222 afterglow: evidence for rapid synchrotron cooling?
R. Sagar, C. S. Stalin, D. Bhattacharya +8
We report photometric observations of the optical afterglow of GRB010222 in V,R and I passbands carried out at UPSO, Naini Tal between 22-27 Feb 2001. We determine CCD Johnson BV a…
Flat Spectrum Gamma Ray Burst Afterglows
Dipankar Bhattacharya
Temporal behaviour of GRB afterglow light curve is derived for the case where the electron energy distribution is relatively flat, with the power-law index p lying between 1.0 and…
General relativistic spectra of accretion discs around rapidly rotating neutron stars: Effect of light bending
Sudip Bhattacharyya, Dipankar Bhattacharya, Arun V. Thampan
We present computed spectra, as seen by a distant observer, from the accretion disc around a rapidly rotating neutron star. Our calculations are carried out in a fully general rela…