Temporal behaviour of GRB afterglow light curve is derived for the case where the electron energy distribution is relatively hard, with the power-law index p lying between 1.0 and 2.0. It is shown that the expected behaviour ...

Just as the regression of the nodes of the lunar orbit is connected with the periodicity in the eclipse phenomenon, the advance of perigee is connected with the periodicity in the fluctuations of Moon's synodic period. ...

The cosmic-ray time variation called Forbush decreases are examined in an overview of observational data with attention given to the three species of Forbush decreases. References are made to the satellite observations of ...

Using helioseismologically inferred internal rotation given by Dziembowski et al., 1989, in the previous work, we (Hiremath and Gokhale 1995, Hiremath 1995) modelled the steady (fossil) part of the poloidal magnetic field ...

Optical photometric and spectroscopic studies of the star FR Cnc = BD + 16 1753 have been carried out during the years 2001 - 2002. The star is photometrically variable with a mean period of 0d.8271 ± 0.0002. The rapid ...

The Franck-Condon factors and r-centroids, which are very closely related to transition probabilities, have been evaluated by the reliable numerical integration procedure for the bands of B1?+ - X1?+, C1?+ - X1?+ D1?-X1?+ ...

Fresh modelling of PKS1830-211 points to a perturbation in the NE image by a lens of globular cluster scale.

Although well established for BL Lac objects and radio-loud quasars, the occurrence of intra-night optical variability (INOV) in radio-quiet quasars is still debated, primarily since only a handful of INOV events with good ...