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...
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...
Suthar, R. L, Guha, S, Bandopadhyay, K, Mishra, V. K, Koul, R, Bhat, C. L
A low-threshold energy, high-sensitivity gamma-ray telescope, MACE (for Major Atmospheric Cerenkov Experiment) is proposed to be built in India for explorations of gamma-ray sky in 100's keV - 10's...
MACE telescope : Servo design aspects (2002)
Mayya, Y. S, Srivatsava, G. P, Koul, R
The design parameters of the servo system for the MACE imaging Cerenkov telescope, based on functional performance, operational and safety requirements of the system are briefly discussed. the servo...
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...
A spectral-ratio based trigger generator for TACTIC vertex elements (2000)
Kaul, I. K, Kaul, S. R, Tickoo, A. K, Koul, R, Bhat, C. L
An unconventional hardware trigger-generator, based on an on-line estimation of the spectral-ratio of the Cerenkov radiation, has been developed for the three Vertex Elements of the TACTIC gamma-ray...
A DSO-based system for temporal-profile extraction of atmospheric Cerenkov events (2000)
Tickoo, A. K, Kaul, S. K, Kaul, I. K, Koul, R, Bhat, C. L
The TACTIC array of Cerenkov telescopes, being set up at Mt. Abu, proposes to record time-profiles of atmospheric Cerenkov pulses with a view to exploit apparent differences in the associated...
Bandyopadhayay, K, Koul, D. K, Mishra, V. K, Koul, R, Suthar, R. L, Koul, M. K, ...
A low-threshold energy, high-sensitivity gamma-ray telescope, MACE (for Major Atmospheric Cerenkov Experiment) is proposed to be built in India for explorations of gamma-ray sky in 100's keV - 10's...
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...
Dhar, V. K, Yadav, K. K, Bhattacharyya, S, Kaul, R. K, Bhat, C. L, Koul, R, ...
An ultra-sensitive, multi-detector gamma-ray telescope array is being setup at Mt. Abu for cosmic gamma-ray studies in the tens of TeV energy region. Here, we present the essential design features of...
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...
Bhat, C. L, Tickoo, A. K, Koul, R, Dhar, V. K, Shanthi, K
A ground-based experiment is proposed for detecting cosmic gamma-ray bursts. The underlying detection strategy and some salient features of the instrument are discussed in this paper.
Vigabatrin associated retinal dysfunction in children with epilepsy
Koul, R, Chacko, A, Ganesh, A, Bulusu, S, Al, R
BACKGROUND—Recent reports have established that eye changes occur in patients treated with vigabatrin. AIM—To identify the eye changes associated with vigabatrin, based on a prospective study...