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.
P. C. Agrawal1 J. S. Yadav2 H. M. Antia2 Dhiraj Dedhia2 P. Shah2 Jai Verdhan Chauhan2 R. K. Manchanda3 V. R. Chitnis2 V. M. Gujar2 Tilak Katoch2 V. N. Kurhade2 P. Madhwani2 T. K. Manojkumar2 V. A. Nikam2 A. S. Pandya2 J. V. Parmar2 D. M. Pawar2 Jayashree Roy1 B. Paul4 Mayukh Pahari5 Ranjeev Misra5 M. H. Ravichandran6 K. Anilkumar6 C. C. Joseph6 K. H. Navalgund7 R. Pandiyan7 K. S. Sarma7 K. Subbarao7
Volume 43, 2022
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