Articles written in Journal of Astrophysics and Astronomy
Volume 38 Issue 2 June 2017 Article ID 0030 Review Article
Large Area X-Ray Proportional Counter (LAXPC) Instrument on AstroSat and Some Preliminary Results from its Performance in the Orbit
P. C. Agrawal J. S. Yadav H. M. Antia Dhiraj Dedhia P. Shah Jai Verdhan Chauhan R. K. Manchanda V. R. Chitnis V. M. Gujar Tilak Katoch V. N. Kurhade P. Madhwani T. K. Manojkumar V. A. Nikam A. S. Pandya J. V. Parmar D. M. Pawar Jayashree Roy B. Paul Mayukh Pahari Ranjeev Misra M. H. Ravichandran K. Anilkumar C. C. Joseph K. H. Navalgund R. Pandiyan K. S. Sarma K. Subbarao
Large area X-ray propositional counter (LAXPC) instrument on AstroSat is aimed at providing high time resolution X-ray observations in 3–80 keV energy band with moderate energy resolution. To achieve large collecting area, a cluster of three co-aligned identical LAXPC detectors, is used to realize an effective area in access of ∼6000cm2 at 15 keV. The large detection volume of the LAXPC detectors, filled with xenon gas at ∼2 atmosphere pressure, results in detection efficiency greater than 50%, above 30 keV. In this article, we present salient features of the LAXPC detectors, their testing and characterization in the laboratory prior to launch and calibration in the orbit. Some preliminary results on timing and spectral characteristics of a few X-ray binaries and other type of sources, are briefly discussed to demonstrate that the LAXPC instrument is performing as planned in the orbit.
Volume 42 All articles Published: 5 June 2021 Article ID 0032 PAYLOAD REVIEW
Large Area X-ray Proportional Counter (LAXPC) in orbit performance: Calibration, background, analysis software
H. M. ANTIA P. C. AGRAWAL DHIRAJ DEDHIA TILAK KATOCH R. K. MANCHANDA RANJEEV MISRA KALLOL MUKERJEE MAYUKH PAHARI JAYASHREE ROY P. SHAH J. S. YADAV
The Large Area X-ray Proportional Counter (LAXPC) instrument on-board AstroSat has three nominally identical detectors for timing and spectral studies in the energy range of 3–80 keV. The performance of these detectors during the five years after the launch of AstroSat is described. Currently, only oneof the detector is working nominally. The variation in pressure, energy resolution, gain and background with time are discussed. The capabilities and limitations of the instrument are described. A brief account of available analysis software is also provided.
Volume 44, 2023
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