Stanford Advisors


Current Research and Scholarly Interests


1. X-ray astronomical instrumentation - Scintillators, Si-Photomultipliers, CZTs, X-ray CCDs, X-ray Hybrid CMOS detectors
2. Hard X-ray polarimetry and associated instrumentation
3. AstroSat CZT Imager - polarimetry of pulsars, black hole XRBs, Gamma Ray Bursts
4. X-ray lobster optic - Schmidt type

All Publications


  • Spectropolarimetric analysis of prompt emission of GRB 160325A: jet with evolving environment of internal shocks MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Sharma, V., Iyyani, S., Bhattacharya, D., Chattopadhyay, T., Vadawale, S. V., Bhalerao, V. B. 2020; 493 (4): 5218–32
  • Time-varying Polarized Gamma-Rays from GRB 160821A: Evidence for Ordered Magnetic Fields ASTROPHYSICAL JOURNAL LETTERS Sharma, V., Iyyani, S., Bhattacharya, D., Chattopadhyay, T., Rao, A. R., Aarthy, E., Vadawale, S. V., Mithun, N. S., Bhalerao, V. B., Ryde, F., Pe'er, A. 2019; 882 (1)
  • AstroSat-CZTI Detection of Variable Prompt Emission Polarization in GRB 171010A ASTROPHYSICAL JOURNAL Chand, V., Chattopadhyay, T., Oganesyan, G., Rao, A. R., Vadawale, S. V., Bhattacharya, D., Bhalerao, V. B., Misra, K. 2019; 874 (1)
  • Prompt emission polarimetry of Gamma ray bursts with ASTROSAT CZT-imager The Astrophysical Journal Chattopadhyay, T., et al 2019; 884 (2)

    View details for DOI 10.3847/1538-4357/ab40b7

  • Flight Camera Package Design, Calibration, and Performance for the Water Recovery X-ray Rocket Mission Wages, M., Hull, S. V., Falcone, A. D., Anderson, T. B., McQuaide, M., Bray, E., Chattopadhyay, T., Burrows, D. N., Buntic, L., McEntaffer, R. L., Miles, D. M., Tutt, J. H., Schultz, T. B., Donovan, B. D., Hillman, C. R., Yastishock, D., Siegmund, O. H. SPIE-INT SOC OPTICAL ENGINEERING. 2019

    View details for DOI 10.1117/12.2529361

    View details for Web of Science ID 000511172300008

  • US Contributions to the Athena Wide Field Imager Burrows, D. N., Allen, S., Bautz, M., Bulbul, E., Chattopadhyay, T., Erdley, J., Falcone, A. D., Grant, C. E., Herrmann, S., Hornschemeier, A., Kelly, D., Kennea, J., Kraft, R., LaMarr, B., Mantz, A., Miller, E. D., Morrisb, R., Nulsen, P., Pradhan, P., Vulice, N., Wilkins, D., Zugger, M. E., Siegmund, O. H. SPIE-INT SOC OPTICAL ENGINEERING. 2019

    View details for DOI 10.1117/12.2528532

    View details for Web of Science ID 000511172300026

  • Development of position sensitive detector module using scintillator and Si photomultiplier for hard x-ray imaging and spectroscopy JOURNAL OF ASTRONOMICAL TELESCOPES INSTRUMENTS AND SYSTEMS Goyal, S. K., Naik, A. P., Mithun, N. S., Vadawale, S. V., Nagrani, N., Madhvi, S., Tiwari, N. K., Ladiya, T., Patel, A. R., Adalja, H. K., Chattopadhyay, T., Shanmugam, M., Auknoor, A., Sharma, P., Patel, V. R. 2019; 5 (1)
  • Violation of Synchrotron Line of Death by the Highly Polarized GRB 160802A ASTROPHYSICAL JOURNAL Chand, V., Chattopadhyay, T., Iyyani, S., Basak, R., Aarthy, E., Rao, A. R., Vadawale, S. V., Bhattacharya, D., Bhalerao, V. B. 2018; 862 (2)
  • Characterizing subpixel spatial resolution of a hybrid CMOS detector JOURNAL OF ASTRONOMICAL TELESCOPES INSTRUMENTS AND SYSTEMS Bray, E., Falcone, A., Wages, M., Chattopadhyay, T., Burrows, D. N. 2018; 4 (3)
  • Phase-resolved X-ray polarimetry of the Crab pulsar with the AstroSat CZT Imager NATURE ASTRONOMY Vadawale, S. V., Chattopadhyay, T., Mithun, N. S., Rao, A. R., Bhattacharya, D., Vibhute, A., Bhalerao, V. B., Dewangan, G. C., Misra, R., Paul, B., Basu, A., Joshi, B. C., Sreekumar, S., Samuel, E., Priya, P., Vinod, P., Seetha, S. 2018; 2 (1): 50–55
  • Surprise in simplicity: an unusual spectral evolution of a single pulse GRB 151006A MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Basak, R., Iyyani, S., Chand, V., Chattopadhyay, T., Bhattacharya, D., Rao, A. R., Vadawale, S. V. 2017; 472 (1): 891–903
  • Recent X-ray hybrid CMOS detector developments and measurements Hull, S. V., Falcone, A. D., Burrows, D. N., Wages, M., Chattopadhyay, T., McQuaide, M., Bray, E., Kern, M., Siegmund, O. H. SPIE-INT SOC OPTICAL ENGINEERING. 2017

    View details for DOI 10.1117/12.2273903

    View details for Web of Science ID 000417112900003

  • ASTROSAT CZT IMAGER OBSERVATIONS OF GRB 151006A: TIMING, SPECTROSCOPY, AND POLARIZATION STUDY ASTROPHYSICAL JOURNAL Rao, A. R., Chand, V., Hingar, M. K., Iyyani, S., Khanna, R., Kutty, A. K., Malkar, J. P., Paul, D., Bhalerao, V. B., Bhattacharya, D., Dewangan, G. C., Pawar, P., Vibhute, A. M., Chattopadhyay, T., Mithun, N. S., Vadawale, S. V., Vagshette, N., Basak, R., Pradeep, P., Samuel, E., Sreekumar, S., Vinod, P., Navalgund, K. H., Pandiyan, R., Sarma, K. S., Seetha, S., Subbarao, K. 2016; 833 (1)
  • Development of a hard x-ray focal plane compton polarimeter: a compact polarimetric configuration with scintillators and Si photomultipliers EXPERIMENTAL ASTRONOMY Chattopadhyay, T., Vadawale, S. V., Goyal, S. K., Mithun, N. S., Patel, A. R., Shukla, R., Ladiya, T., Shanmugam, M., Patel, V. R., Ubale, G. P. 2016; 41 (1-2): 197–214
  • Line profile modelling for multi-pixel CZT detectors Chattopadhyay, T., Vadawale, S. V., Rao, A. R., Bhattacharya, D., Mithun, N. S., Bhalerao, V., DenHerder, J. W., Takahashi, T., Bautz, M. SPIE-INT SOC OPTICAL ENGINEERING. 2016

    View details for DOI 10.1117/12.2234805

    View details for Web of Science ID 000387731500128

  • Hard X-ray polarimetry with Astrosat-CZTI ASTRONOMY & ASTROPHYSICS Vadawale, S. V., Chattopadhyay, T., Rao, A. R., Bhattacharya, D., Bhalerao, V. B., Vagshette, N., Pawar, P., Sreekumar, S. 2015; 578
  • Prospects of hard X-ray polarimetry with Astrosat-CZTI EXPERIMENTAL ASTRONOMY Chattopadhyay, T., Vadawale, S. V., Rao, A. R., Sreekumar, S., Bhattacharya, D. 2014; 37 (3): 555–77
  • MEASUREMENT OF LOW ENERGY DETECTION EFFICIENCY OF A PLASTIC SCINTILLATOR: IMPLICATIONS ON THE LOWER ENERGY LIMIT AND SENSITIVITY OF A HARD X-RAY FOCAL PLANE COMPTON POLARIMETER ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES Chattopadhyay, T., Vadawale, S. V., Shanmugam, M., Goyal, S. K. 2014; 212 (1)
  • Compton polarimeter as a focal plane detector for hard X-ray telescope: sensitivity estimation with Geant4 simulations EXPERIMENTAL ASTRONOMY Chattopadhyay, T., Vadawale, S. V., Pendharkar, J. 2013; 35 (3): 391–412
  • Prospects of Hard X-ray Polarimetry with Astrosat-CZTI Vadawale, S. V., Chattopadhyay, T., Rao, A. R., IEEE IEEE. 2013
  • A conceptual design of hard x-ray focal plane detector for simultaneous x-ray polarimetric, spectroscopic and timing measurements Vadawale, S. V., Chattopadhyay, T., Pendharkar, J., Takahashi, T., Murray, S. S., DenHerder, J. W. SPIE-INT SOC OPTICAL ENGINEERING. 2012

    View details for DOI 10.1117/12.935295

    View details for Web of Science ID 000312391600133