Indian Institute of Technology Kharagpur |

Journal

The tracking tapered gridded estimator for the power spectrum from drift scan observations Chatterjee S., Bharadwaj S. , Choudhuri S. , Sethi S. , Patwa A. K. By Monthly Notices of the Royal Astronomical Society: Letters 519 2410-2425 (2023)
Quantifying the redshift space distortion of the bispectrum III : detection prospects of the multipole moments Mazumdar A., Sarkar D. , Bharadwaj S. By Monthly Notices of the Royal Astronomical Society: Letters 520 2534-2546 (2023)
Towards 21-cm intensity mapping at z = 2.28 with uGMRT using the tapered gridded estimator - II. Cross-polarization power spectrum Elahi A. K., Bharadwaj S. , Ghosh A. , Pal S. , Ali S. S., Choudhuri S. , Chakraborty A. , Datta A. , Roy N. , Choudhury M. , Dutta P. By Monthly Notices of the Royal Astronomical Society: Letters 520 2094-2108 (2023)
Modelling the energy distribution in CHIME/FRB catalogue-1 Bhattacharyya S., Bharadwaj S. , Tiwari H. , Majumdar S. By Monthly Notices of the Royal Astronomical Society: Letters 522 3349-3356 (2023)
A maximum-likelihood estimate of the parameters of the fast radio burst population Bhattacharyya S., Tiwari H. , Bharadwaj S. , Majumdar S. By Monthly Notices of the Royal Astronomical Society: Letters 513 1-5 (2022)
Towards 21-cm intensity mapping at z = 2.28 with uGMRT using the tapered gridded estimator I: Foreground avoidance Pal S., Elahi A. K., Bharadwaj S. , Ali S. S., Choudhuri S. , Ghosh A. , Chakraborty A. , Datta A. , Roy N. , Dutta M. , Dutta P. By Monthly Notices of the Royal Astronomical Society: Letters 516 2851-2863 (2022)
Redshifted 21-cm bispectrum: impact of the source models on the signal and the IGM physics from the Cosmic Dawn Kamran M., Ghara R., Majumdar S., Mellema G., Bharadwaj S., Pritchard J., Mondal R., Iliev I. By Journal of Cosmology and Astroparticle Physics 2022 - (2022)
Redshifted 21-cm bispectrum - II. Impact of the spin temperature fluctuations and redshift space distortions on the signal from the Cosmic Dawn Kamran M., Ghara R. , Majumdar S. , Mondal R. , Melema G. , Bharadwaj S. , Pritchard J. R., Iliev I. T. By Monthly Notices of the Royal Astronomical Society 502 3800-3813 (2021)
A fast estimator for quantifying the shape dependence of the 3D bispectrum Shaw A.K., Bharadwaj S., Sarkar D., Mazumdar A., Singh S., Majumdar S. By Journal of Cosmology and Astroparticle Physics 2021 - (2021)
Constraining the fast radio burst properties using the joint distributions of dispersion measure and fluence of the events detected at Parkes, ASKAP, CHIME, and UTMOST Bhattacharyya S., Bharadwaj S. By Monthly Notices of the Royal Astronomical Society 502 904-914 (2021)
First Multi-redshift Limits on Post-Epoch of Reionization 21 cm Signal from z = 1.96-3.58 Using uGMRT Chakraborty A., Datta A. , Roy N. , Bharadwaj S. , Choudhury T. R., Datta K. K., Pal S. , Choudhury M. , Choudhuri S. , Dutta P. , Sarkar D. By The Astrophysical Journal Letters 907 - (2021)
The auto- and cross-angular power spectrum of the Cas A supernova remnant in radio and X-ray Saha P., Bharadwaj S., Chakravorty S., Roy N., Choudhuri S., Gunther H.M., Smith R.K. By Monthly Notices of the Royal Astronomical Society 502 5313-5324 (2021)
Demonstrating the Tapered Gridded Estimator (TGE) for the cosmological H I 21-cm power spectrum using 150-MHz GMRT observations Pal S., Bharadwaj S. , Ghosh A. , Choudhuri S. By Monthly Notices of the Royal Astronomical Society 501 3378-3391 (2021)
Simulated predictions for H I at z = 3.35 with the Ooty Wide Field Array (OWFA) - II. Foreground avoidance Chatterjee S., Bharadwaj S. , Marthi V. R. By Monthly Notices of the Royal Astronomical Society 500 4398-4413 (2021)
Angular power spectrum of supernova remnants: effects of structure, geometry, and diffuse foreground Choudhuri S., Saha P. , Roy N. , Bharadwaj S. , Dey J. By Monthly Notices of the Royal Astronomical Society 501 3364-3370 (2021)
The impact of non-Gaussianity on the Epoch of Reionization parameter forecast using 21-cm power-spectrum measurements Shaw A.K., Bharadwaj S., Mondal R. By Monthly Notices of the Royal Astronomical Society 498 1480-1495 (2020)
Quantifying the redshift space distortion of the bispectrum II: Induced non-Gaussianity at second-order perturbation Mazumdar A., Bharadwaj S., Sarkar D. By Monthly Notices of the Royal Astronomical Society 498 3975-3984 (2020)
Quantifying the redshift space distortion of the bispectrum I: primordial non-Gaussianity Bharadwaj S., Mazumdar A. , Sarkar D. By Monthly Notices of the Royal Astronomical Society 493 594-602 (2020)
Redshifted 21-cm bispectrum - I. Impact of the redshift space distortions on the signal from the Epoch of Reionization Majumdar S., Kamran M., Pritchard J.R., Mondal R., Mazumdar A., Bharadwaj S., Mellema G. By Monthly Notices of the Royal Astronomical Society 499 5090-5106 (2020)
All-sky angular power spectrum - I. Estimating brightness temperature fluctuations using the 150-MHz TGSS survey Choudhuri S., Ghosh A. , Roy N. , Bharadwaj S. , Intema H. T., Ali S. S. By Monthly Notices of the Royal Astronomical Society 494 1936-1945 (2020)
Predictions for measuring the 21-cm multifrequency angular power spectrum using SKA-Low Mondal R., Shaw A.K., Iliev I.T., Bharadwaj S., Datta K.K., Majumdar S., Sarkar A.K., Dixon K.L. By Monthly Notices of the Royal Astronomical Society 494 4043-4056 (2020)
Detailed study of ELAIS N1 field with the uGMRT - II. Source properties and spectral variation of foreground power spectrum from 300-500 MHz observations Chakraborty A., Roy . , Datta A. , Choudhuri S. , Datta K. K., Dutta P. , Bharadwaj S. , Intema H. , Choudhury M. , Pal S. , Choudhury T. R. By Monthly Notices of the Royal Astronomical Society 490 243-259 (2019)
Detailed study of the ELAIS N1 field with the uGMRT - I. Characterizing the 325 MHz foreground for redshifted 21 cm observations Chakraborty, A., Datta A. , Choudhuri S. , Roy N. , Intema H. , Choudhury M. , Datta K. K., Pal S. , Bharadwaj S. , Dutta P. , Choudhury T. R. By Monthly Notices of the Royal Astronomical Society 487 4102-4113 (2019)
On the prospects of measuring the cosmic dawn 21-cm power spectrum using the upgraded Giant Metrewave Radio Telescope (uGMRT) Chatterjee, S., Bharadwaj S. By Monthly Notices of the Royal Astronomical Society 483 2269-2274 (2019)
The impact of non-Gaussianity on the error covariance for observations of the Epoch of Reionization 21-cm power spectrum Shaw A. K., Bharadwaj S. , Mondal R. By Monthly Notices of the Royal Astronomical Society 487 4951-4964 (2019)
A method to determine the evolution history of the mean neutral Hydrogen fraction Mondal R., Bharadwaj S. , Datta K. K., Majumdar S. , Shaw, A. K., Sarkar A. K. By Monthly Notices of the Royal Astronomical Society (Letters) 483 109-103 (2019)
A study of Kepler supernova remnant: angular power spectrum estimation from radio frequency data Saha P., Bharadwaj S. , Roy N. , Choudhuri S. , Chattopadhyay D. By Monthly Notices of the Royal Astronomical Society 489 5968-5875 (2019)
Modelling the post-reionization neutral hydrogen (H I) 21-cm bispectrum Sarkar D., Majumdar S. , Bharadwaj S. By Monthly Notices of the Royal Astronomical Society 490 2880-2889 (2019)
A Tapered Gridded Estimator (TGE) for the multifrequency angular power spectrum (MAPS) and the cosmological H I 21-cm power spectrum Bharadwaj S., Pal S. , Choudhuri S. , Dutta P. By Monthly Notices of the Royal Astronomical Society 483 5694-5700 (2019)
Redshift-space distortions of the H I 21-cm intensity mapping signal due to the internal motions within galaxies Sarkar D., Bharadwaj S. By Monthly Notices of the Royal Astronomical Society 487 5666-5678 (2019)
An Image-based Tapered Gridded Estimator (ITGE) for the angular power spectrum Choudhuri S., Dutta P. , Bharadwaj S. By Monthly Notices of the Royal Astronomical Society 483 3910-3918 (2019)
Studying the morphology of H I isodensity surfaces during reionization using Shapefinders and percolation analysis Bag S., Mondal R. , Sarkar P. , Bharadwaj S. , Choudhury T. R., Sahni V. By Monthly Notices of the Royal Astronomical Society 485 2235-2251 (2019)
A spherical harmonic analysis of the Ooty Wide Field Array (OWFA) visibility signal Chatterjee S., Bharadwaj S. By Monthly Notices of the Royal Astronomical Society 478 2915-2926 (2018)
Predictions for measuring the cross power spectrum of the HI 21-cm signal and the Lyman- forest using OWFA Sarkar A. K., Bharadwaj S. , Guha Sarkar T. By Journal of Cosmology and Astroparticle Physics 0 051-051 (2018)
Quantifying the non-Gaussianity in the EoR 21-cm signal through bispectrum Majumdar S., Pritchard, J. R., Mondal R. , Watkinson, C. A., Bharadwaj S. , Mellema G. By Monthly Notices of the Royal Astronomical Society 476 4007-4024 (2018)
An analytical method to simulate the H I 21-cm visibility signal for intensity mapping experiments Sarkar A. K., Bharadwaj S. , Marthi V. R. By Monthly Notices of the Royal Astronomical Society 473 261-270 (2018)
The shape and size distribution of H II regions near the percolation transition Bag, S., Mondal, R. , Sarkar P. , Bharadwaj S. , Sahni V. By Monthly Notices of the Royal Astronomical Society 477 1984-1992 (2018)
Towards simulating and quantifying the light-cone EoR 21-cm signal Mondal R., Bharadwaj S. , Datta K. K. By Monthly Notices of the Royal Astronomical Society 474 1390-1397 (2018)
Modelling redshift space distortion in the post-reionization H I 21-cm power spectrum Sarkar D., Bharadwaj S. By Monthly Notices of the Royal Astronomical Society 476 96-108 (2018)
Statistics of the epoch of reionization (EoR) 21-cm signal - II. The evolution of the power-spectrum error-covariance Mondal R., Bharadwaj S. , Majumdar S. By Monthly Notices of the Royal Astronomical Society 464 2992-3004 (2017)
Validating a novel angular power spectrum estimator using simulated low frequency radio-interferometric data Choudhuri S., Roy N. , Bharadwaj S. , Ali S. S., Ghosh A. , Dutta P. By New Astronomy 57 94-103 (2017)
FRB Event Rate Predictions for the Ooty Wide Field Array Bhattacharyya S., Bera A. , Bharadwaj S. , Bhat R. N., Chengalur J. N. By Journal of Astrophysics and Astronomy 38 - (2017)
The angular power spectrum measurement of the Galactic synchrotron emission in two fields of the TGSS survey Choudhuri S., Bharadwaj S. , Ali S. S., Roy N. , Intema H. T., Ghosh A. By Monthly Notices of the Royal Astronomical Society: Letters 470 11-15 (2017)
Simulated predictions for H I at z = 3.35 with the Ooty Wide Field Array - I. Instrument and the foregrounds Marthi V. R., Chatterjee S. , Chengalur J. N., Bharadwaj S. By Monthly Notices of the Royal Astronomical Society 471 3112-3126 (2017)
Simulating the z = 3.35 HI 21-cm Visibility Signal for the Ooty Wide Field Array (OWFA) Chatterjee S., Bharadwaj S. , Marthi V. R. By Journal of Astrophysics and Astronomy 38 - (2017)
Fisher Matrix-based Predictions for Measuring the z = 3.35 Binned 21-cm Power Spectrum using the Ooty Wide Field Array (OWFA) Sarkar A. ., Bharadwaj S. , Ali S. S. By Journal of Astrophysics and Astronomy 38 - (2017)
Modelling the 21-cm Signal from the Epoch of Reionization and Cosmic Dawn Roy Choudhury T., Datta K. , Majumdar S. , Ghara R. , Paranjape A. , Mondal R. , Bharadwaj S. , Samui S. By Journal of Astrophysics and Astronomy 37 29- (2016)
Modelling the post-reionization neutral hydrogen (H I ) bias Sarkar D., Bharadwaj S. , Anathpindika S. By Monthly Notices of the Royal Astronomical Society 460 4310-4319 (2016)
Probing Individual Sources during Reionization and Cosmic Dawn using Square Kilometre Array HI 21-cm Observations Datta K. K., Ghara R. , Majumdar . , Choudhury, T. R., Bharadwaj S. , Roy, H. , Datta A. By Journal of Astrophysics and Astronomy 37 - (2016)
Statistics of the epoch of reionization 21-cm signal - I. Power spectrum error-covariance Mondal R., Bharadwaj S. , Majumdar S. By Monthly Notices of the Royal Astronomical Society 456 1936-1947 (2016)
Prospects of Measuring the Angular Power Spectrum of the Diffuse Galactic Synchrotron Emission with SKA1 Low Ali S. S., Bharadwaj S. , Choudhuri S. , Ghosh A. , Roy N. By Journal of Astrophysics and Astronomy 37 - (2016)
Line-of-Sight Anisotropies in the Cosmic Dawn and Epoch of Reionization 21-cm Power Spectrum Majumdar S., Datta K. K., Ghara R. , Mondal R. , Choudhury T. R., Bharadwaj S. , Ali S. , Datta A. By Journal of Astrophysics and Astronomy 37 - (2016)
Redshifted HI 21-cm Signal from the Post-Reionization Epoch: Cross-Correlations with Other Cosmological Probes Sarkar T. G., Datta K. K., Pal A. K., Choudhury T. R., Bharadwaj S. By Journal of Astrophysics and Astronomy 37 - (2016)
On modelling the Fast Radio Burst population and event rate predictions Bera A., Bhattacharyya S. , Bharadwaj S. , Bhat, R. N. By Monthly Notices of the Royal Astronomical Society 457 2530-2539 (2016)
Tapering the sky response for angular power spectrum estimation from low-frequency radio-interferometric data Choudhuri S., Bharadwaj S. , Roy N. , Ghosh A. , Ali S. By Monthly Notices of the Royal Astronomical Society 459 151-156 (2016)
The effects of the small-scale DM power on the cosmological neutral hydrogen (HI) distribution at high redshifts Sarkar A., Mondal R. , Das S. , Sethi S. K., Bharadwaj S. , Marsh D. . By Journal of Cosmology and Astroparticle Physics 2016 - (2016)
The visibility-based tapered gridded estimator (TGE) for the redshifted 21-cm power spectrum Choudhuri S., Bharadwaj S. , Chatterjee S. , Ali S. , Roy N. , Ghosh A. By Monthly Notices of the Royal Astronomical Society 463 4093-4107 (2016)
Fisher Matrix Predictions for Detecting the Cosmological 21-cm Signal with the Ooty Wide Field Array (OWFA) Bharadwaj S., Sarkar A. K., Ali S. S. By Journal of Astrophysics and Astronomy 36 - (2015)
The effect of non-Gaussianity on error predictions for the Epoch of Reionization (EoR) 21-cm power spectrum Mondal ., Bharadwaj S. , Majumdar S. , Bera A. , Acharyya . By Monthly Notices of the Royal Astronomical Society: Letters 449 41-45 (2015)
Visibility-based angular power spectrum estimation in low-frequency radio interferometric observations Choudhuri S., Bharadwaj S. , Ghosh A. , Ali S. S. By Monthly Notices of the Royal Astronomical Society 445 4351-4365 (2014)
On the use of seminumerical simulations in predicting the 21-cm signal from the epoch of reionization Majumdar ., Mellema G. , Datta K. K., Jensen H. , Choudhury, T. R., Bharadwaj S. , Friedrich M. M. By Monthly Notices of the Royal Astronomical Society 443 2845-2861 (2014)
Prospects for Detecting the 326.5 MHz Redshifted 21-cm HI Signal with the Ooty Radio Telescope (ORT) Ali S. S., Bharadwaj S. By Journal of Astrophysics and Astronomy 35 157-182 (2014)
The effect of peculiar velocities on the epoch of reionization 21-cm signal Majumdar S., Bharadwaj S. , Choudhury T. R. By Monthly Notices of the Royal Astronomical Society 434 1978-1988 (2013)
The H I column density power spectrum of six nearby spiral galaxies Dutta P., Bharadwaj S. By Monthly Notices of the Royal Astronomical Society: Letters 436 49-53 (2013)
Predictions for BAO distance estimates from the cross-correlation of the Lyman- forest and redshifted 21-cm emission Guha Sarkar ., Bharadwaj S. By Journal of Cosmology and Astroparticle Physics - (2013)
Probing interstellar turbulence in spiral galaxies using H I power spectrum analysis Dutta P., Begum A. , Bharadwaj S. , Chengalur J. N. By New Astronomy 19 89-98 (2012)
Exploring the Cosmic Web in the Sloan Digital Sky Survey Data Release 7 using the Local Dimension Sarkar P., Pandey B. , Bharadwaj S. By Monthly Notices of the Royal Astronomical Society 423 959-961 (2012)
Characterizing foreground for redshifted 21 cm radiation: 150 MHz Giant Metrewave Radio Telescope observations Ghosh A., Prasad J. , Bharadwaj S. , Ali S. S., Chengalur J. N. By Monthly Notices of the Royal Astronomical Society 426 3295-3314 (2012)
Constrainingquasar and intergalactic medium properties through bubble detection in redshifted 21-cm maps Majumdar S., Bharadwaj S. , Choudhury T. R. By Monthly Notices of the Royal Astronomical Society 426 3178-3194 (2012)
The impact of anisotropy from finite light traveltime on detecting ionized bubbles in redshifted 21-cm maps Majumdar S., Bharadwaj S. , Datta K. K., Choudhury T. R. By Monthly Notices of the Royal Astronomical Society 413 1409-1418 (2011)
The size of the longest filament in the luminous red galaxy distribution Pandey B., Kulkarni G. , Bharadwaj S. , Souradeep T. By Monthly Notices of the Royal Astronomical Society 411 332-336 (2011)
GMRT observation towards detecting the post-reionization 21-cm signal Ghosh A., Bharadwaj S. , Ali S. S., Chengalur J. N. By Monthly Notices of the Royal Astronomical Society 411 2426-2438 (2011)
Improved foreground removal in GMRT 610 MHz observations towards redshifted 21-cm tomography Ghosh A., Bharadwaj S. , Ali S. S., Chengalur J. N. By Monthly Notices of the Royal Astronomical Society 418 2584-2589 (2011)
Cross-correlation of the H I 21-cm signal and Ly forest: a probe of cosmology Guha Sarkar T., Bharadwaj S. , Choudhury T. R., Datta K. K. By Monthly Notices of the Royal Astronomical Society 410 1130-1134 (2011)
Turbulence in the harassed galaxy NGC4254 Dutta P., Begum A. , Bharadwaj S. , Chengalur J. N. By Monthly Notices of the Royal Astronomical Society: Letters 405 102-106 (2010)
H I 21 cm opacity fluctuations power spectra towards Cassiopeia A Roy N., Chengalur J. N., Dutta P. , Bharadwaj S. By Monthly Notices of the Royal Astronomical Society: Letters 404 45-49 (2010)
A study of interstellar medium of dwarf galaxies using HI power spectrum analysis Dutta, P.; Begum, A.; Bharadwaj, S.; Chengalur, J. N. By Monthly Notices of the Royal Astronomical Society 398 - (2009)
The optimal redshift for detecting ionized bubbles in HI 21-cm maps Datta K. K., Bharadwaj S. , Choudhury T. R. By Monthly Notices of the Royal Astronomical Society: Letters 399 1132-1136 (2009)
Testing homogeneity on large scales in the Sloan Digital Sky Survey Data Release One Yadav, Jaswant; Bharadwaj, Somnath; Pandey, Biswajit; Seshadri, T. R. By Monthly Notices of the Royal Astronomical Society 354 - (2005)
The cosmic microwave background radiation fluctuations from HI perturbations prior to reionization Bharadwaj, Somnath; Ali, Sk. Saiyad By Monthly Notices of the Royal Astronomical Society 352 - (2004)
The Size of the Longest Filaments in the Universe Bharadwaj, Somnath; Bhavsar, Suketu P.; Sheth, Jatush V. By Astrophysical Journal 606 - (2004)
Modeling galaxy halos using dark matter with pressure Bharadwaj, Somnath; Kar, Sayan By Physical Review D 68 - (2003)
HI Fluctuations at Large Redshifts: I--Visibility correlation Bharadwaj, S.; Sethi, S. K. By Journal of Astrophysics and Astronomy 22 - (2001)
Using HI to Probe Large Scale Structures at z ~ 3 Bharadwaj, Somnath; Nath, Biman B.; Sethi, Shiv K. By Journal of Astrophysics and Astronomy 22 - (2001)
Self-Similarity and the Pair Velocity Dispersion Bharadwaj S. By The Astrophysical Journal 477 1-7 (1997)
Skewness in the cosmic microwave background anisotropy from an inflationary gravity wave background Bharadwaj S., Munshi D. , Souradeep T. By Physical Review D 56 4503-4510 (1997)
Perturbative Growth of Cosmological Clustering. II. The Two-Point Correlation Bharadwaj, Somnath By Astrophysical Journal 466 - (1996)
The Evolution of Correlation Functions in the Zeldovich Approximation and Its Implications for the Validity of Perturbation Theory Bharadwaj, Somnath By Astrophysical Journal 472 - (1996)
Perturbative growth of cosmological clustering. I: Formalism Bharadwaj S. By The Astrophysical Journal 428 419-432 (1994)

Conferences

A comprehensive study of the EoR 21-cm signal bispectrum Majumdar S., Mondal R., Pritchard J.R., Bharadwaj S., Mellema G. By 2019 URSI Asia-Pacific Radio Science Conference, AP-RASC 2019 - (2019)

Physics

Faculty

Research Areas

Principal Investigator

Ph. D. Students

Aman Pawar

Khandakar Md Asif Elahi

Minal Chhabra

Sukhdeep Singh

Suman Pramanick