Zobrazeno 1 - 10
of 125
pro vyhledávání: '"D. K. Sahu"'
Autor:
Rishabh Singh Teja, Avinash Singh, Judhajeet Basu, G. C. Anupama, D. K. Sahu, Anirban Dutta, Vishwajeet Swain, Tatsuya Nakaoka, Utkarsh Pathak, Varun Bhalerao, Sudhanshu Barway, Harsh Kumar, Nayana A. J., Ryo Imazawa, Brajesh Kumar, Koji S. Kawabata
Publikováno v:
The Astrophysical Journal Letters, Vol 954, Iss 1, p L12 (2023)
We present early-phase panchromatic photometric and spectroscopic coverage spanning the far-ultraviolet to near-infrared regime of the nearest hydrogen-rich core-collapse supernova (SN) in the last 25 yr, SN 2023ixf. We observe early “flash” feat
Externí odkaz:
https://doaj.org/article/9680e295a655467685de78734b527dca
Autor:
Anjasha Gangopadhyay, Keiichi Maeda, Avinash Singh, Nayana A. J., Tatsuya Nakaoka, Koji S. Kawabata, Kenta Taguchi, Mridweeka Singh, Poonam Chandra, Stuart D. Ryder, Raya Dastidar, Masayuki Yamanaka, Miho Kawabata, Rami Z. E. Alsaberi, Naveen Dukiya, Rishabh Singh Teja, Bhavya Ailawadhi, Anirban Dutta, D. K. Sahu, Takashi J. Moriya, Kuntal Misra, Masaomi Tanaka, Roger Chevalier, Nozomu Tominaga, Kohki Uno, Ryo Imazawa, Taisei Hamada, Tomoya Hori, Keisuke Isogai
Publikováno v:
The Astrophysical Journal, Vol 957, Iss 2, p 100 (2023)
We present optical, near-infrared, and radio observations of supernova (SN) SN IIb 2022crv. We show that it retained a very thin H envelope and transitioned from an SN IIb to an SN Ib; prominent H α seen in the pre-maximum phase diminishes toward th
Externí odkaz:
https://doaj.org/article/f555b78f96b043cc891a0288f4445391
Autor:
Rishabh Singh Teja, Avinash Singh, D. K. Sahu, G. C. Anupama, Brajesh Kumar, Tatsuya Nakaoka, Koji S Kawabata, Masayuki Yamanaka, Ali Takey, Miho Kawabata
Publikováno v:
The Astrophysical Journal, Vol 954, Iss 2, p 155 (2023)
We present an extensive, panchromatic photometric (UV, optical, and near-IR) and low-resolution optical spectroscopic coverage of a Type IIP supernova SN 2018gj that occurred on the outskirts of the host galaxy NGC 6217. From the V- band light curve,
Externí odkaz:
https://doaj.org/article/c29bf8a08ec94ab388cfcc7fcdd743f6
Autor:
Arpan Ghosh, Saurabh Sharma, Joe P. Ninan, Devendra K. Ojha, Bhuwan C. Bhatt, D. K. Sahu, Tapas Baug, R. K. Yadav, Puji Irawati, A. S. Gour, Neelam Panwar, Rakesh Pandey, Tirthendu Sinha, Aayushi Verma
Publikováno v:
The Astrophysical Journal, Vol 954, Iss 1, p 82 (2023)
We present here the results of 8 yr of our near-simultaneous optical–near-infrared spectro-photometric monitoring of the bona fide FU Ori (FUor)-type candidate V2493 Cygnus (V2493 Cyg) starting from 2013 September to 2021 June. During our optical m
Externí odkaz:
https://doaj.org/article/720edf0f1622498fb221531f4a26d63d
Autor:
Arti Joshi, Nikita Rawat, Axel Schwope, J C Pandey, Simone Scaringi, D K Sahu, Srinivas M Rao, Mridweeka Singh
We present analyses of an Intermediate Polar, IGR J15094-6649, based on the archival optical data obtained from the Transiting Exoplanet Survey Satellite (TESS) and X-ray data obtained from the Suzaku, NuSTAR, and Neil Gehrels Swift Observatory (Swif
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6fd6fb34659887f583423ef838f7643f
http://arxiv.org/abs/2304.00099
http://arxiv.org/abs/2304.00099
Publikováno v:
Indian Journal of Physics.
We present optical photometric and spectroscopic studies of three supernovae (SNe) SN 2013bz, PSN J0910+5003 and ASASSN-16ex. UV-optical photometric data of ASASSN-16ex obtained with Swift-UVOT are also analyzed. These objects were initially classifi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::543ec25b15b6f838382fe22d949697fe
Publikováno v:
AIP Conference Proceedings.
Autor:
S B Pandey, Amit Kumar, Brajesh Kumar, G C Anupama, S Srivastav, D K Sahu, J Vinko, A Aryan, A Pastorello, S Benetti, L Tomasella, Avinash Singh, A S Moskvitin, V V Sokolov, R Gupta, K Misra, P Ochner, S Valenti
Publikováno v:
Pandey, S B, Kumar, A, Kumar, B, Anupama, G C, Srivastav, S, Sahu, D K, Vinko, J, Aryan, A, Pastorello, A, Benetti, S, Tomasella, L, Singh, A, Moskvitin, A S, Sokolov, V V, Gupta, R, Misra, K, Ochner, P & Valenti, S 2021, ' Photometric, polarimetric, and spectroscopic studies of the luminous, slow-decaying Type Ib SN 2012au ', Monthly Notices of the Royal Astronomical Society, vol. 507, no. 1, pp. 1229-1253 . https://doi.org/10.1093/mnras/stab1889
Optical, near-infrared (NIR) photometric and spectroscopic studies, along with the optical imaging polarimetric results for SN 2012au, are presented in this article to constrain the nature of the progenitor and other properties. Well-calibrated multi
We present optical observations and Monte Carlo radiative transfer modeling of the Type Ia supernova SN 2011aa. With a $\Delta m_{15} (B)$ of $0.59 \pm 0.07$ mag and a peak magnitude $M_{\rm B}$ of $-19.30 \pm 0.27$ mag, SN 2011aa has the slowest dec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c28c37ee937d5f4b881527fdfa13c9c6
http://arxiv.org/abs/2209.00569
http://arxiv.org/abs/2209.00569