The Effect of Non-Thermal Protons on the High Energy Spectra of Black Hole Binaries (2003)
Bhattacharyya, S., Bhatt, N., Misra, R., Kaul, C. L.
In the inner regions of an accretion disk around a black hole, the presence of non-thermal protons would via p-p collisions produce electrons, positrons and $\gamma$-rays. For such a scenario, the...
A Continuous Injection Plasma Model for the X-Ray/Radio Knots in Kpc-Scale Jets of AGN (2003)
Sahayanathan, S., Misra, R., Kembhavi, A. K., Kaul, C. L.
We consider the evolution of a spherically expanding plasma cloud, where there is continuous injection of non-thermal electrons. We compute the time dependent electron distribution and resultant...
Energy Sensitive Search for Pulsed Photons from Crab Pulsar using the TACTIC Imaging Element (2003)
Rannot, R. C, Yadav, K. K, Dhar, V. K, Tickoo, A. K, Bhatt, N, Bhattacharyya, S, ...
The Imaging Element (IE) of the 4-element TACTIC array of atmospheric Cherenkov telescopes is in operation at Mt. Abu Rajasthan, in Western India. We have successfully detected a steady signal from...
Adiabatic cooling and nonthermal spectrum of blazars (2001)
Sahayanathan, S, Bhattacharyya, S, Kaul, C. L, Bhat, C. L
Here we study the effect of adiabatic cooling on the non-thermal synchrotron spectra of blazars from radio to X-ray region resulting when blazars are in the flaring state.
Coordinated TeV gamma-ray and optical polarization study of BL Lac object Mkn 501 (2000)
Joshi, U. C, Baliyan, K. S, Ganesh, S, Deshpande, M. R, Bhattacharyya, S, Kaul, R. K, ...
Coordinated TeV gamma-ray and optical polarization observations of the BL Lac object Mkn 501, carried out during 1997 with the TACTIC imaging Cerenkov telescope of the BARC and the 1.2 m Gurushikhar...
Observations of the Crab Nebula, Mkn 501 and Mkn 421 using the TACTIC Imaging Element (1999)
Bhatt, N., Agarwal, N. K., Bhat, C. K., Bhattacharyya, S., Dhar, V. K., Goyal, A., ...
The results of our observational campaigns on the two extragalactic sources Mkn 501 and Mkn 421, carried out with the Imaging Element of the TACTIC array, during March-May, 1998 and April-May, 1999,...
Gamma ray production in SNR's -contribution from photomeson process (1999)
Bhattacharya, S, Kaul, R. K, Kaul, C. L, Bhat, C. L
We estimate the integral γ-ray fluxes above 10 MeV photon energy, likely to result from neutral pion decay, following photomeson interactions between ultra-high energy protons accelerated in...
Millisecond pulsars as VHE gamma-ray sources (1999)
Kaul, R. K, Kaul, C. L, Bhat, C. L
The detectability of millisecond pulsars in VHE gamma-ray bracket (>5x10 to the power 11 eV), with the recently-commissioned TACTIC array, has been investigated on the basis of system energetics and...
Solstitial and Hemispherical Asymmetry in the Response of Geomagnetic Field, (1998)
Shah,G. N., Kaul,R. K., Kaul,C. L., Razdan,H., Merryfield,W. J.
Sponsored in part by Grants NGR05-020-550 and NSF-ATM77-20580.
Design philosophy of TACTIC -- a high sensitivity VHE gamma-ray telescope (1993)
Bhat, C. L, Razdan, H, Koul, R, Sapru, M. L, Tickoo, A. K, Rannot, R. C, ...
TACTIC is a high-sensitivity gound-based very high energy (VHE) telescope designed for undertaking comprehensive temporal and spectral studies of galactic and extragalactic gamma-ray sources. Its...
Evaluation of BTS 67 582, a novel antidiabetic agent, in normal and diabetic rats
Jones, R B, Dickinson, K, Anthony, D M, Marita, A R, Kaul, C L, Buckett, W R
The effect of BTS 67 582, a novel antidiabetic agent, has been evaluated on plasma glucose and plasma insulin in normal and streptozotocin-induced diabetic rats.BTS 67 582 (3 to 300 mg kg−1,...
Importance of the sympathetic nervous system in the development of renal hypertension in the rat
1. Chemical sympathectomy with 6-hydroxydopamine (6-OHDA) prevented the development of renal hypertension in 80% of weanling male rats of the C.F. strain.
Mechanism of the antagonism of the hypotensive action of guanethidine by propranolol
1. Propranolol antagonizes the hypotensive effect of guanethidine in renal hypertensive but not in adrenal demedullated renal hypertensive rats.