46 citations · 110 across the 16 of their papers we have counts for
17 papers
WALTzER: Wide-band Atmospheric Laboratory for Transiting Exoplanet Research
A. G. Sreejith, L. Fossati, M. Lendl +81
Understanding the origin and evolution of planetary atmospheres, and the connection between their lower and upper atmospheric layers, remains a fundamental challenge in exoplanet s…
CUTE reveals escaping metals in the upper atmosphere of the ultra-hot Jupiter WASP-189b
A. G. Sreejith, Kevin France, Luca Fossati +12
Ultraviolet observations of Ultra-hot Jupiters (UHJs), exoplanets with temperatures over 2000\,K, provide us with an opportunity to investigate if and how atmospheric escape shapes…
The Colorado Ultraviolet Transit Experiment (CUTE) signal to noise calculator
A. G. Sreejith, Luca Fossati, P. E. Cubillos +3
We present here the signal-to-noise (S/N) calculator developed for the Colorado Ultraviolet Transit Experiment (CUTE) mission. CUTE is a 6U CubeSat operating in the near-ultraviole…
Impact of MgII interstellar medium absorption on near-ultraviolet exoplanet transit measurements
A. G. Sreejith, L. Fossati, P. E. Cubillos +2
Ultraviolet (UV) transmission spectroscopy probes atmospheric escape, which has a significant impact on planetary atmospheric evolution. If unaccounted for, interstellar medium abs…
The Autonomous Data Reduction Pipeline for the CUTE Mission
A. G. Sreejith, Luca Fossati, S. Ambily +8
The Colorado Ultraviolet Transit Experiment (CUTE) is a 6U NASA CubeSat carrying on-board a low-resolution, near-ultraviolet (2479-3306 A) spectrograph. It has a Cassegrain telesco…
The Near Ultraviolet Transient Surveyor (NUTS): An ultraviolet telescope to observe variable sources
S. Ambily, Mayuresh Sarpotdar, Joice Mathew +9
Observing the ultraviolet (UV) sky for time-variable phenomena is one of the many exciting science goals that can be achieved by a relatively small aperture telescope in space. The…
Ca II H&K stellar activity parameter: a proxy for stellar Extreme Ultraviolet Fluxes
A. G. Sreejith, L. Fossati, A. Youngblood +2
Atmospheric escape is an important factor shaping the exoplanet population and hence drives our understanding of planet formation. Atmospheric escape from giant planets is driven p…
Prospect for UV observations from the Moon. III. Assembly and ground calibration of Lunar Ultraviolet Cosmic Imager (LUCI)
Joice Mathew, B. G. Nair, Margarita Safonova +14
The Lunar Ultraviolet Cosmic Imager (LUCI) is a near-ultraviolet (NUV) telescope with all-spherical mirrors, designed and built to fly as a scientific payload on a lunar mission wi…
Design and modeling of a tunable spatial heterodyne spectrometer for emission line studies
Nirmal Kaipachery, Sridharan Rengaswamy, Sripadmanaban Sriram +6
Spatial Heterodyne Spectroscopy (SHS) is a relatively novel interferometric technique similar to the Fourier transform spectroscopy with heritage from the Michelson Interferometer.…
Wide-field Ultraviolet Imager for Astronomical Transient Studies
Joice Mathew, S. Ambily, Ajin Prakash +6
Though the ultraviolet (UV) domain plays a vital role in the studies of astronomical transient events, the UV time-domain sky remains largely unexplored. We have designed a wide-fi…
Near UV Imager with an MCP Based Photon Counting Detector
S. Ambily, Joice Mathew, Mayuresh Sarpotdar +5
We are developing a compact UV Imager using light weight components, that can be flown on a small CubeSat or a balloon platform. The system has a lens-based optics that can provide…
Development of Data Acquisition Methods for an FPGA-Based Photon Counting Detector
S. Ambily, Mayuresh Sarpotdar, Joice Mathew +5
MCP-based detectors are widely used in the ultraviolet (UV) region due to their low noise levels, high sensitivity and good spatial and temporal resolution. We have developed a com…
Prospect for UV observations from the Moon. II. Instrumental Design of an Ultraviolet Imager LUCI
Joice Mathew, Ajin Prakash, Mayuresh Sarpotdar +6
We present a design for a near-ultraviolet (NUV) imaging instrument which may be flown on a range of available platforms, including high-altitude balloons, nanosatellites, or space…
Pointing System for the Balloon-Borne Astronomical Payloads
K. Nirmal, A. G. Sreejith, Joice Mathew +5
We describe the development and implementation of a light-weight, fully autonomous 2-axis pointing and stabilization system designed for balloon-borne astronomical payloads. The sy…
A software package for evaluating the performance of a star sensor operation
Mayuresh Sarpotdar, Joice Mathew, A. G. Sreejith +5
We have developed a low-cost off-the-shelf component star sensor (StarSense) for use in minisatellites and CubeSats to determine the attitude of a satellite in orbit. StarSense is…
Measurements of gondola motion on a stratospheric balloon flight
Margarita Safonova, K. Nirmal, A. G. Sreejith +9
Balloon experiments are an economically feasible method of conducting observations in astronomy that are not possible from the ground. The astronomical payload may include a telesc…
An Overview of High-Altitude Balloon Experiments at the Indian Institute of Astrophysics
Margarita Safonova, Akshata Nayak, A. G. Sreejith +8
We have initiated the High-Altitude Ballooning programme at Indian Institute of Astrophysics, Bangalore, in the year 2011 with the primary purpose of developing and flying low-cost…