63 citations · 407 across the 35 of their papers we have counts for
20 papers · 1 filter
Development of a one-dimensional position sensitive detector for Compton X-ray polarimeters
Abhay Kumar, Santosh V. Vadawale, N. P. S. Mithun +4
The scientific potential of X-ray polarimetry has long been recognized, but the challenges in measuring polarization have left it largely unexplored, particularly in the hard X-ray…
The high-speed X-ray camera on AXIS
Eric D. Miller, Marshall W. Bautz, Catherine E. Grant +15
AXIS is a Probe-class mission concept that will provide high-throughput, high-spatial-resolution X-ray spectral imaging, enabling transformative studies of high-energy astrophysica…
Demonstrating repetitive non-destructive readout (RNDR) with SiSeRO devices
Tanmoy Chattopadhyay, Sven Herrmann, Peter Orel +9
We demonstrate so-called repetitive non-destructive readout (RNDR) for the first time on a Single electron Sensitive Readout (SiSeRO) device. SiSeRO is a novel on-chip charge detec…
Improved noise performance from the next-generation buried-channel p-Mosfet SiSeROs
Tanmoy Chattopadhyay, Sven Herrmann, Matthew Kaplan +9
The Single electron Sensitive Read Out (SiSeRO) is a novel on-chip charge detector output stage for charge-coupled device (CCD) image sensors. Developed at MIT Lincoln Laboratory,…
Experimental verification of off-axis polarimetry with Cadmium Zinc Telluride detectors of AstroSat-CZT Imager
C. S. Vaishnava, N. P. S. Mithun, Santosh V. Vadawale +10
The Cadmium Zinc Telluride Imager (CZTI) onboard AstroSat consists of an array of a large number of pixellated CZT detectors capable of measuring the polarization of incident hard…
Extending the energy range of AstroSat-CZTI up to 380 keV with Compton Spectroscopy
Abhay Kumar, Tanmoy Chattopadhyay, Santosh V. Vadawale +4
The CZTI (Cadmium Zinc Telluride Imager) onboard AstroSat is a high energy coded mask imager and spectrometer in the energy range of 20 - 100 keV. Above 100 keV, the dominance of C…
Single electron Sensitive Readout (SiSeRO) X-ray detectors: Technological progress and characterization
Tanmoy Chattopadhyay, Sven Herrmann, Peter Orel +11
Single electron Sensitive Read Out (SiSeRO) is a novel on-chip charge detector output stage for charge-coupled device (CCD) image sensors. Developed at MIT Lincoln Laboratory, this…
Gamma-Ray Polarimetry
Denis Bernard, Tanmoy Chattopadhyay, Fabian Kislat +1
While the scientific potential of high-energy X-ray and gamma-ray polarimetry has long been recognized, measuring the polarization of high-energy photons is challenging. To date, t…
Development and characterization of a fast and low noise readout for the next generation X-ray CCDs
Tanmoy Chattopadhyay, Sven Herrmann, Peter Orel +8
The broad energy response, low electronic read noise, and good energy resolution have made X-ray Charge-Coupled Devices (CCDs) an obvious choice for developing soft X-ray astronomi…
First results on SiSeRO (Single electron Sensitive Read Out) devices -- a new X-ray detector for scientific instrumentation
Tanmoy Chattopadhyay, Sven Herrmann, Barry Burke +11
We present an evaluation of a novel on-chip charge detector, called the Single electron Sensitive Read Out (SiSeRO), for charge-coupled device (CCD) image sensor applications. It u…
The AstroSat Mass Model: Imaging and Flux studies of off-axis sources with CZTI
Sujay Mate, Tanmoy Chattopadhyay, Varun Bhalerao +11
The Cadmium Zinc Telluride Imager (CZTI) on AstroSat is a hard X-ray coded-aperture mask instrument with a primary field of view of 4.6 x 4.6 degrees (FWHM). The instrument collima…
Exploring Sub-MeV Sensitivity of AstroSat-CZTI for ON-axis Bright Sources
Abhay Kumar, Tanmoy Chattopadhyay, Santosh V Vadawale +5
The Cadmium Zinc Telluride Imager (CZTI) onboard AstroSat is designed for hard X-ray imaging and spectroscopy in the energy range of 20 - 100 keV. The CZT detectors are of 5 mm thi…
Tiny-box: A tool for the versatile development and characterization of low noise fast X-ray imaging detectors
Tanmoy Chattopadhyay, Sven Herrmann, Steven Allen +8
X-ray Charge Coupled Devices (CCDs) have been the workhorse for soft X-ray astronomical instruments for the past quarter century. They provide broad energy response, extremely low…
Identifying charged particle background events in X-ray imaging detectors with novel machine learning algorithms
D. R. Wilkins, S. W. Allen, E. D. Miller +8
Space-based X-ray detectors are subject to significant fluxes of charged particles in orbit, notably energetic cosmic ray protons, contributing a significant background. We develop…
BlackCAT CubeSat: A Soft X-ray Sky Monitor, Transient Finder, and Burst Detector for High-energy and Multimessenger Astrophysics
Tanmoy Chattopadhyay, Abraham D. Falcone, David N. Burrows +2
Here we present the conceptual design of a wide field imager onboard a 6U class CubeSat platform for the study of GRB prompt and afterglow emission and detection of electromagnetic…
X-ray Hybrid CMOS Detectors: Recent Development and Characterization Progress
Tanmoy Chattopadhyay, Abraham D. Falcone, David N. Burrows +8
X-ray Hybrid CMOS Detectors (HCDs) have advantages over X-ray CCDs due to their higher readout rate abilities, flexible readout, inherent radiation hardness, and low power, which m…
Design & development of position sensitive detector for hard X-ray using SiPM and new generation scintillators
S. K. Goyal, Amisha P. Naik, Mithun N. P. S. +11
There is growing interest in high-energy astrophysics community for the development of sensitive instruments in the hard X-ray energy extending to few hundred keV. This requires po…
Recent X-ray hybrid CMOS detector developments and measurements
Samuel V. Hull, Abraham D. Falcone, David N. Burrows +5
The Penn State X-ray detector lab, in collaboration with Teledyne Imaging Sensors (TIS), have progressed their efforts to improve soft X-ray Hybrid CMOS detector (HCD) technology o…
In-orbit performance of AstroSat CZTI
Santosh V. Vadawale, A. R. Rao, Dipankar Bhattacharya +6
Cadmium-Zinc-Telluride Imager (CZTI) is one of the five payloads on-board recently launched Indian astronomy satellite AstroSat. CZTI is primarily designed for simultaneous hard X-…
Development of a Hard X-ray focal plane Compton Polarimeter: A compact polarimetric configuration with Scintillators and Si photomultipliers
T. Chattopadhyay, S. V. Vadawale, S. K. Goyal +7
X-ray polarization measurement of cosmic sources provides two unique parameters namely degree and angle of polarization which can probe the emission mechanism and geometry at close…