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Bharat Kumar Gehlot
Bharat Kumar Gehlot
Postdoctoral Researcher, Kapteyn Astronomical Institute, University of Groningen
Verified email at astro.rug.nl
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Year
Upper limits on the 21 cm epoch of reionization power spectrum from one night with LOFAR
AH Patil, S Yatawatta, LVE Koopmans, AG De Bruyn, MA Brentjens, ...
The Astrophysical Journal 838 (1), 65, 2017
2562017
Improved upper limits on the 21 cm signal power spectrum of neutral hydrogen at z ≈ 9.1 from LOFAR
FG Mertens, M Mevius, LVE Koopmans, AR Offringa, G Mellema, ...
Monthly Notices of the Royal Astronomical Society 493 (2), 1662-1685, 2020
1352020
Systematic biases in low-frequency radio interferometric data due to calibration: the LOFAR-EoR case
AH Patil, S Yatawatta, S Zaroubi, LVE Koopmans, AG de Bruyn, V Jelić, ...
Monthly Notices of the Royal Astronomical Society 463 (4), 4317-4330, 2016
782016
The first power spectrum limit on the 21-cm signal of neutral hydrogen during the Cosmic Dawn at z = 20–25 from LOFAR
BK Gehlot, FG Mertens, LVE Koopmans, MA Brentjens, S Zaroubi, ...
Monthly Notices of the Royal Astronomical Society 488 (3), 4271-4287, 2019
662019
Constraining the intergalactic medium at z ≈ 9.1 using LOFAR Epoch of Reionization observations
R Ghara, SK Giri, G Mellema, B Ciardi, S Zaroubi, IT Iliev, LVE Koopmans, ...
Monthly Notices of the Royal Astronomical Society 493 (4), 4728-4747, 2020
472020
Tight constraints on the excess radio background at z = 9.1 from LOFAR
R Mondal, A Fialkov, C Fling, IT Iliev, R Barkana, B Ciardi, G Mellema, ...
Monthly Notices of the Royal Astronomical Society 498 (3), 4178-4191, 2020
362020
Polarization leakage in epoch of reionization windows–II. Primary beam model and direction-dependent calibration
KMB Asad, LVE Koopmans, V Jelić, A Ghosh, FB Abdalla, MA Brentjens, ...
Monthly Notices of the Royal Astronomical Society 462 (4), 4482-4494, 2016
322016
Wide-field LOFAR-LBA power-spectra analyses: impact of calibration, polarization leakage, and ionosphere
BK Gehlot, LVE Koopmans, AG de Bruyn, S Zaroubi, MA Brentjens, ...
Monthly Notices of the Royal Astronomical Society 478 (2), 1484-1501, 2018
262018
Comparing foreground removal techniques for recovery of the LOFAR-EoR 21 cm power spectrum
I Hothi, E Chapman, JR Pritchard, FG Mertens, LVE Koopmans, B Ciardi, ...
Monthly Notices of the Royal Astronomical Society 500 (2), 2264-2277, 2021
242021
Polarization leakage in epoch of reionization windows–III. Wide-field effects of narrow-field arrays
KMB Asad, LVE Koopmans, V Jelić, AG de Bruyn, VN Pandey, BK Gehlot
Monthly Notices of the Royal Astronomical Society 476 (3), 3051-3062, 2018
222018
Precision requirements for interferometric gridding in the analysis of a 21 cm power spectrum
AR Offringa, F Mertens, S Van der Tol, B Veenboer, BK Gehlot, ...
Astronomy & Astrophysics 631, A12, 2019
182019
The AARTFAAC Cosmic Explorer: observations of the 21-cm power spectrum in the EDGES absorption trough
BK Gehlot, FG Mertens, LVE Koopmans, AR Offringa, A Shulevski, ...
Monthly Notices of the Royal Astronomical Society 499 (3), 4158-4173, 2020
142020
Foreground modelling via Gaussian process regression: an application to HERA data
A Ghosh, F Mertens, G Bernardi, MG Santos, NS Kern, CL Carilli, ...
Monthly Notices of the Royal Astronomical Society 495 (3), 2813-2826, 2020
122020
Peering into the dark (ages) with low-frequency space interferometers
LVE Koopmans, R Barkana, M Bentum, G Bernardi, AJ Boonstra, ...
Experimental astronomy, 1-36, 2021
82021
A Roadmap for Astrophysics and Cosmology with High-Redshift 21 cm Intensity Mapping
A Parsons, JE Aguirre, AP Beardsley, G Bernardi, JD Bowman, P Bull, ...
Bulletin of the American Astronomical Society 51 (7), 241, 2019
82019
A numerical study of 21-cm signal suppression and noise increase in direction-dependent calibration of LOFAR data
M Mevius, F Mertens, LVE Koopmans, AR Offringa, S Yatawatta, ...
Monthly Notices of the Royal Astronomical Society 509 (3), 3693-3702, 2022
42022
Prospects of Detecting HI using Redshifted 21-cm Radiation at z∼ 3
BK Gehlot, JS Bagla
Journal of Astrophysics and Astronomy 38 (1), 1-9, 2017
42017
Effects of model incompleteness on the drift-scan calibration of radio telescopes
BK Gehlot, DC Jacobs, JD Bowman, N Mahesh, SG Murray, M Kolopanis, ...
Monthly Notices of the Royal Astronomical Society 506 (3), 4578-4592, 2021
22021
Characterization of the AARTFAAC-12 aperture array: radio source counts at 42 and 61 MHz
A Shulevski, TMO Franzen, WL Williams, T Vernstrom, BK Gehlot, ...
Monthly Notices of the Royal Astronomical Society 513 (1), 1036-1045, 2022
12022
Statistical analysis of the causes of excess variance in the 21 cm signal power spectra obtained with the Low-Frequency Array
H Gan, LVE Koopmans, FG Mertens, M Mevius, AR Offringa, B Ciardi, ...
Astronomy & Astrophysics 663, A9, 2022
2022
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