GLAST burst monitor instrument simulation and modeling (2008)
Hoover, A. S., Kippen, R. M., Wallace, M. S., Pendleton, G. N., Fishman, G. J., Meegan, C. A., ...
Validation of the GLAST burst monitor instrument response simulation software (2007)
Hoover, A. S., Klimenko, A., Kippen, R. M., Wallace, M. S., Pendleton, G. N., Meegan, C. A., ...
Instrument response modeling and simulation for the GLAST burst monitor (2007)
Kippen, R. M., Hoover, A. S., Wallace, M. S., Pendleton, G. N., Meegan, C. A., Fishman, G. J., ...
Full spacecraft source modeling and validation for the GLAST burst monitor (2007)
Wallace, M. S., Kippen, R. M., Hoover, A. S., Pendleton, G. N., Meegan, C. A., Fishman, G. J., ...
Exchange, use and conservation of animal genetic resources : policy and regulatory options (2006)
Hiemstra, S.J., Drucker, A.G., Tvedt, M.W., Louwaars, N.P., Oldenbroek, J.K., Awgichew, K., ...
The GLAST burst monitor (2004)
Bhat, P. N., Meegan, C. A., Lichti, G. G., Briggs, M. S., Connaghton, V., Diehl, R., ...
Study of Spectral Lag for Short GRBs (2002)
Gupta, Varsha, Gupta, Patrick Das, Bhat, P. N.
This paper reports statistically significant correlations between various burst parameters, observed in a sample of 156 GRBs belonging to BATSE 4B catalog with T90 less than 2 s. The number of...
Angular Resolution of the Pachmarhi Array of Cerenkov Telescopes (2002)
Majumdar, P., Bhat, P. N., Acharya, B. S., Chitnis, V. R., Rahman, M. A., Singh, B. B., ...
The Pachmarhi Array of Cerenkov Telescopes consists of a distributed array of 25 telescopes that are used to sample the atmospheric Cerenkov Photon showers. Each telescope consists of 7 parabolic...
Distributed Data Acquisition System for Pachmarhi Array of Cerenkov Telescopes (2001)
Bhat, P. N., Acharya, B. S., Chitnis, V. R., D'Souza, A. I., Francis, P. J., Gothe, K. S., ...
Pachmarhi Array of \v Cerenkov Telescopes (PACT) consists of a 5$\times$5 array of \v Cerenkov telescopes deployed over an area of 100 $m$ $\times$ 80 $m$, in the form of a rectangular matrix. The...
Pachmarhi Array of \v{C}erenkov Telescopes and its Sensitivity (2001)
Chitnis, V. R., Acharya, B. S., Bhat, P. N., Gothe, K. S., John, A. V., Majumdar, P., ...
Pachmarhi Array of \v{C}erenkov Telescopes (PACT) has been designed to search for celestial TeV $\gamma-$rays using the wavefront sampling technique. PACT, located at Pachmarhi, (latitude 22$^\circ$...
Estimation of Shower Parameters in Wavefront Sampling Technique (2001)
Wavefront sampling experiments record arrival times of \v{C}erenkov photons with high precision at various locations in \v{C}erenkov pool using a distributed array of telescopes. It was shown earlier...
Gamma-Hadron Separation using \v{C}erenkov Photon Density Fluctuations (2001)
In atmospheric \v{C}erenkov technique $\gamma-$rays are detected against abundant background produced by hadronic showers. In order to improve signal to noise ratio of the experiment, it is necessary...
A Possible High Altitude High Energy Gamma Ray Observatory in India (2001)
Cowsik, R., Bhat, P. N., Chitnis, V. R., Acharya, B. S., Vishwanath, P. R.
Recently an Indian Astronomical Observatory has been set up at Hanle (32$^\circ$ 46$^\prime$ 46$^{\prime\prime}$ N, 78$^\circ$ 57$^\prime$ 51$^{\prime\prime}$ E, 4515m amsl) situated in the high...
Very High Energy Gamma Ray Emission from Crab Nebula with the PACT Array (2001)
Vishwanath, P. R., Acharya, B. S., Bhat, P. N., Chitnis, V. R., Majumdar, P., Rahman, M. A., ...
The Crab nebula has proved to be the nearest to a standard candle in VHE $\gamma-$ ray astronomy. Results on the gamma ray emission from the nebula at various energies have come in the last decade...
Angular Resolution of Pachmarhi Array of Cerenkov Telescopes (2001)
Majumdar, P., Acharya, B. S., Bhat, P. N., Chitnis, V. R., Rahman, M. A., Singh, B. B., ...
Pachmarhi Array of \v{C}erenkov Telescopes(PACT), consisting of a distributed array of 25 telescopes is used to sample the atmospheric \v{C}erenkov Photon showers. The shower front is fitted to a...
Very High Energy Gamma Ray Emission from Crab and Geminga Pulsars (2001)
Vishwanath, P. R., Acharya, B. S., Bhat, P. N., Chitnis, V. R., Majumdar, P., Rahman, M. A., ...
The main inference from the experiments of the '80s that the time-averaged energy spectra of pulsars had to steepen in the GeV-TeV energy region has been reinforced in the '90s from experiments with...
Observations of Mkn 421 using Pachmarhi Array of \v{C}erenkov Telescopes (2001)
Bhat, P. N., Acharya, B. S., Chitnis, V. R., Majumdar, P., Rahman, M. A., Singh, B. B., ...
Pachmarhi Array of \v{C}erenkov Telescopes (PACT), based on wavefront sampling technique, has been used for detecting TeV gamma rays from galactic and extra-galactic $\gamma $-ray sources. The...
Gamma Ray and Hadron generated \v{C}erenkov Photon Spectra at Various Observation Altitudes (2001)
Rahman, M. A., Bhat, P. N., Acharya, B. S., Chitnis, V. R., Majumdar, P., Vishwanath, P. R.
We study the propagation of Cerenkov photons generated by Very High Energy gamma-rays and hadrons in the atmosphere. The photon production height distributions are estimated from semi-empirical...
Atmospheric \v{C}erenkov Technique is an established methodology to study $TeV$ energy gamma rays. However the challenging problem has always been the poor signal to noise ratio due to the presence...
Optical counter-parts of Gamma Ray Bursts (2000)
Gamma Ray Bursts (GRB'S) being the most energetic astronomical phenomena known to date still pose a formidable challenge to astronomers. The BATSE on board the Compton Observatory (CGRO) launched in...
Morphological properties of short duration Gamma Ray Bursts (2000)
Gupta, V, Gupta, P. D, Bhat, P. N
In this paper, we study a sample of short duration bursts contained in the 3B BATSE catalogue. We fit the time profiles of these GRBs with lognormal functions and study various temporal properties of...
Multicolour broadband study of a lenticular galaxy : NGC 4753 (2000)
Dewangan, G. C, Singh, K. P, Bhat, P. N
Based on VBT observations, we report multicolour broadband study of a lenticular galaxy, NGC 4753 with prominent dust lanes. The extinction curve derived for NGC 4753 is similar to the Galactic...
Pachmarhi array of Cerenkov telescopes (2000)
Bhat, P. N, Acharya, B. S, Chitnis, V. R., D' Souza, A. I, Francis, P. J, Gothe, K. S, ...
Pachmarhi Array of Cerenkov Telescopes (PACT) consisting of 25 telescopes has been installed at Pachmarhi (longitude : 76d 26' E, latitude : 22d 28' N and altitude : 1075m) recently. The telescopes...
Dust Properties of NGC4753 (1999)
Dewangan, G. C., Singh, K. P., Bhat, P. N.
We report BVR surface photometry of a lenticular galaxy, NGC4753 with prominent dust lanes. We have used the multicolor broadband photometry to study dust-extinction as a function of wavelength and...
Morphological properties of Short Duration GRBs (1999)
Gupta, Varsha, Gupta, Patrick Das, Bhat, P. N.
In this paper, we study a sample of 65 short duration bursts contained in the 3B catalogue. We fit the time profiles of these GRBs with lognormal functions and study various temporal properties. In...
Atmospheric Cherenkov technique is an established methodology to study TeV energy gamma rays. Here we carry out systematic monte carlo simulation studies of the timing information of Cherenkov...
Fluctuations in Čerenkov photon density in extensive air showers (1999)
In the absence of a standard source of γ-rays or hadrons of known energy one has to study the details of production of Cerenkov light at the observation level only through detailed simulation...
Cerenkov Photon Density Fluctuations in Extensive Air Showers (1998)
The details of Cerenkov light produced by a gamma ray or a cosmic ray incident at the top of the atmosphere is best studied through systematic simulations of the extensive air showers. Recently such...
Pachmarhi Array of Cerenkov Telescopes (1997)
This talk is based on the Very High Energy Gamma Ray Astronomy observations planned to be carried out at Pachmarhi in the central Indian state of Madhya Pradesh using the well known atmospheric \v...
The role of fluctuations in atmospheric Cerenkov technique (1997)
In the absence of a standard source of gamma rays or hadrons of known energy one has to study the details of production of \v Cerenkov light at the observation level only through detailed simulation...
Pachmarhi Array of Cerenkov Telescopes (1997)
Bhat, P. N., Vishwanath, P. R., Acharya, B. S., Krishnaswamy, M. R.
Very High Energy (VHE) gamma -ray Astronomy observations are planned to be carried out at Pachmarhi in the central Indian state of Madhya Pradesh using the well known atmospheric Cerenkov technique....
A Dust Lane in the Radio Galaxy 3C 270 (1996)
Mahabal, A, Kembhavi, A, Singh, K. P, Bhat, P. N, Prabhu, T. P
We present the broad band surface photometry of the radio galaxy 3C 270 (NGC 4261). We find a distinct dust lane in the V - R image of the galaxy and determine its oriantation and size. We use the...
Ground-based Very High Energy Gamma-Ray Astronomy at Pachmarhi (1996)
Acharya, B. S, Bhat, P. N, D'Souza, A. I, Francis, J, Gothe, K. S, John, A. V, ...
A Dust Lane in the Radio galaxy 3C270 (1995)
Mahabal, Ashish, Kembhavi, Ajit, Bhat, P. N.
We present broad band surface photometry of the radio galaxy 3C270 (NGC~4261). We find a distinct dust lane in the $V-R$ image of the galaxy, and determine its orientation and size. We use the major...
Surface photometry of ellipticals: Radio and cluster galaxies (1993)
Singh, K. P, Bhat, P. N, Prabhu, T. P, Kembhavi, A. K
Broad-band surface photometry in V, R and I colors is presented for three elliptical galaxies immersed in hot intracluster gas emitting X-rays due to thermal bremsstrahlung. The galaxies are (1) a cD...
Photometry of X-ray selected quasars from Einstein Medium Sensitivity Survey (1993)
Singh, K. P, Bhat, P. N, Prabhu, T. P
We present a few photometric measurements of quasars in the Einstein Medium Sensitivity Survey (EMSS). The measurements are a part of an ongoing program of CCD photometry of quasars in the southern...