N. Bhatt

Publication List Details

Period

1999 - 2008

Number

18

Co-Authors

Very High Energy gamma-ray observations of Mrk 501 using TACTIC imaging gamma-ray telescope during 2005-06 (2008)

Godambe, S. V., Rannot, R. C., Chandra, P., Yadav, K. K., Tickoo, A. K., Venugopal, K., ...

In this paper we report on the Markarian 501 results obtained during our TeV $\gamma$-ray observations from March 11 to May 12, 2005 and February 28 to May 7, 2006 for 112.5 hours with the TACTIC...

The TACTIC atmospheric Cherenkov Imaging telescope (2007)

Koul, R., Tickoo, A. K., Kaul, S. K., Kaul, S. R., Kumar, N., Yadav, K. K., ...

The TACTIC $\gamma$-ray telescope, equipped with a light collector of area $\sim$9.5m$^2$ and a medium resolution imaging camera of 349-pixels, has been in operation at Mt.Abu, India since 2001. This...

Very High Energy $\gamma$-ray and Near Infrared observations of 1ES2344+514 during 2004-05 (2007)

Godambe, S. V., Rannot, R. C., Baliyan, K. S., Tickoo, A. K., Thoudam, S., Dhar, V. K., ...

We have observed the BL Lac object 1ES2344+514 (z = 0.044) in Very High Energy (VHE) gamma-ray and near-infrared wavelength bands with TACTIC and MIRO telescopes respectively. The observations were...

Orbital Evolution and orbital phase resolved spectroscopy of the HMXB pulsar 4U 1538-52 with RXTE-PCA and BeppoSAX (2007)

Mukherjee, U., Raichur, H., Paul, B., Naik, S., Bhatt, N.

We report here results from detailed timing and spectral studies of the high mass X-ray binary pulsar 4U~1538--52 over several binary periods using observations made with the Rossi X-ray Timing...

Observations of TeV gamma-rays from Mrk 421 during Dec. 2005 to Apr. 2006 with the TACTIC telescope (2007)

Yadav, K. K., Chandra, P., Tickoo, A. K., Rannot, R. C., Godambe, S., Koul, M. K., ...

The TACTIC $\gamma$-ray telescope has observed Mrk 421 on 66 clear nights from Dec. 07, 2005 to Apr. 30, 2006, totalling $\sim$ 202 hours of on-source observations. Here, we report the detection of...

Orbital Evolution and Orbital Phase Resolved Spectroscopy of the HMXB Pulsar 4U 1538–52 with RXTE-PCA and BeppoSAX (2006)

Mukherjee, U, Raichur, H, Paul, B, Naik, S, Bhatt, N

We report here results from detailed timing and spectral studies of the high mass X-ray binary pulsar 4U 1538–52 over several binary periods using observations made with the Rossi X-rayTiming...

Self-consistent computation of gamma-ray spectra due to proton-proton interactions in black hole systems (2006)

Bhattacharyya, S., Bhatt, N., Misra, R.

In the inner regions of an accretion disk around a black hole, relativistic protons can interact with ambient matter to produce electrons, positrons and $\gamma$-rays. The resultant steady state...

Orbital Evolution and Orbital Phase Resolved Spectroscopy of the HMXB Pulsar 4U 1538–52 with RXTE-PCA and BeppoSAX (2006)

Mukherjee, U, Raichur, H, Paul, B, Naik, S, Bhatt, N

We report here results from detailed timing and spectral studies of the high mass X-ray binary pulsar 4U 1538–52 over several binary periods using observations made with the Rossi X-rayTiming...

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...

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...

Multinode data acquisition and control system for the Vertex Elements of the TACTIC telescope array (2001)

Yadav, K. K, Bhatt, N, Kaul, S. R, Koul, R

An interrupt based multinode data acquisition and control system has been developed for the three Vertex Elements of the TACTIC telescope array. The paper describes the salient design features of the...

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,...

Drive control system for the TACTIC γ-ray telescope (1999)

Tickoo, A. K, Koul, R, Kaul, S. K, Kaul, I. K, Bhat, C. L, Bhatt, N

We present here some salient features of the hardware and software aspects of the 2-axes drive system developed for the TACTIC γ-ray telescope array. A test-report of its performance is also...

Computer Network - based data acquisition and control system for the imaging element of the TACTIC array (1999)

Kanda, A, Koul, R, Bhatt, N, Kaul, S. R

An interrupt-driven distributed Data AcQuisition and Control System (DAQCS) has been developed for the Imaging Element of the 4-element gamma-ray telescope array, TACTIC. A network of PCs, running...

Simulation and experimental studies of polarization properties of atmospheric Cerenkov pulses (1999)

Bhat, C. L, Rannot, R. C, Mohapatra, D. K, Gandhi, V. N, Tickoo, A. K, Kaul, R, ...

We present here preliminary results obtained form some simulation and experimental investigations on the polarization state of atmospheric Cerenkov events.