Zobrazeno 1 - 10
of 201
pro vyhledávání: '"G. C. ANUPAMA"'
Autor:
Gokul P. Srinivasaragavan, Vishwajeet Swain, Brendan O’Connor, Shreya Anand, Tomás Ahumada, Daniel Perley, Robert Stein, Jesper Sollerman, Christoffer Fremling, S. Bradley Cenko, S. Antier, Nidhal Guessoum, Thomas Hussenot-Desenonges, Patrice Hello, Stephen Lesage, Erica Hammerstein, M. Coleman Miller, Igor Andreoni, Varun Bhalerao, Joshua S. Bloom, Anirban Dutta, Avishay Gal-Yam, K-Ryan Hinds, Amruta Jaodand, Mansi Kasliwal, Harsh Kumar, Alexander S. Kutyrev, Fabio Ragosta, Vikram Ravi, Kritti Sharma, Rishabh Singh Teja, Sheng Yang, G. C. Anupama, Eric C. Bellm, Michael W. Coughlin, Ashish A. Mahabal, Frank J. Masci, Utkarsh Pathak, Josiah Purdum, Oliver J. Roberts, Roger Smith, Avery Wold
Publikováno v:
The Astrophysical Journal Letters, Vol 960, Iss 2, p L18 (2024)
We report observations of the optical counterpart of the long gamma-ray burst (GRB) GRB 230812B and its associated supernova (SN) SN 2023pel. The proximity ( z = 0.36) and high energy ( E _γ _,iso ∼ 10 ^53 erg) make it an important event to study
Externí odkaz:
https://doaj.org/article/527707e0b82e453687c61f6261c7de4e
Autor:
Rishabh Singh Teja, Jared A. Goldberg, D. K. Sahu, G. C. Anupama, Avinash Singh, Vishwajeet Swain, Varun Bhalerao
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 44 (2024)
We present detailed multiband photometric and spectroscopic observations and analysis of a rare core-collapse supernova, SN 2021wvw, that includes photometric evolution up to 250 days and spectroscopic coverage up to 100 days postexplosion. A unique
Externí odkaz:
https://doaj.org/article/96f4579c9f874113866a3eefc98f3b1c
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 8 (2024)
Extensive multiwavelength studies of novae have been carried out in our galaxy and in M31 for decades. However, UV studies of extragalactic novae are limited, especially those in quiescence. For the first time, we present a UV catalog of novae in M31
Externí odkaz:
https://doaj.org/article/0b397c818c964a9bb945fcf488ecd4e8
Autor:
Sarang Shah, Smitha Subramanian, Avinash C. K., David R. Andersen, Warren Skidmore, G. C. Anupama, Francisco Delgado, Kim Gillies, Maheshwar Gopinathan, A. N. Ramaprakash, B. E. Reddy, T. Sivarani, Annapurni Subramaniam
Publikováno v:
The Astronomical Journal, Vol 168, Iss 2, p 59 (2024)
At first light, the Thirty Meter Telescope (TMT) near-infrared (NIR) instruments will be fed by a multiconjugate adaptive optics instrument known as the Narrow Field Infrared Adaptive Optics System (NFIRAOS). NFIRAOS will use six laser guide stars to
Externí odkaz:
https://doaj.org/article/3c778aa76be1486b87d787a8fa377d96
Autor:
Judhajeet Basu, M. Pavana, G. C. Anupama, Sudhanshu Barway, Kulinder Pal Singh, Vishwajeet Swain, Shubham Srivastav, Harsh Kumar, Varun Bhalerao, L. S. Sonith, G. Selvakumar
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 44 (2024)
We report the optical, UV, and soft X-ray observations of the 2017–2022 eruptions of the recurrent nova M31N 2008-12a. We find a cusp feature in the $r^{\prime} $ - and $i^{\prime} $ -band light curves close to the peak, which could be related to j
Externí odkaz:
https://doaj.org/article/b2e60c0f57c54f69ac41cf645cc49d97
Autor:
Mridweeka Singh, Devendra K. Sahu, Barnabás Barna, Anjasha Gangopadhyay, Raya Dastidar, Rishabh Singh Teja, Kuntal Misra, D. Andrew Howell, Xiaofeng Wang, Jun Mo, Shengyu Yan, Daichi Hiramatsu, Craig Pellegrino, G. C. Anupama, Arti Joshi, K. Azalee Bostroem, Jamison Burke, Curtis McCully, Rama Subramanian V, Gaici Li, Gaobo Xi, Xin Li, Zhitong Li, Shubham Srivastav, Hyobin Im, Anirban Dutta
Publikováno v:
The Astrophysical Journal, Vol 965, Iss 1, p 73 (2024)
We present optical observations and analysis of the bright type Iax supernova SN 2020udy hosted by NGC 0812. The evolution of the light curve of SN 2020udy is similar to that of other bright type Iax SNe. Analytical modeling of the quasi-bolometric l
Externí odkaz:
https://doaj.org/article/2f099c2c4011403da4febb4b252c6922
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:
Gokul P. Srinivasaragavan, Brendan O’Connor, S. Bradley Cenko, Alexander J. Dittmann, Sheng Yang, Jesper Sollerman, G. C. Anupama, Sudhanshu Barway, Varun Bhalerao, Harsh Kumar, Vishwajeet Swain, Erica Hammerstein, Isiah Holt, Shreya Anand, Igor Andreoni, Michael W. Coughlin, Simone Dichiara, Avishay Gal-Yam, M. Coleman Miller, Jaime Soon, Roberto Soria, Joseph Durbak, James H. Gillanders, Sibasish Laha, Anna M. Moore, Fabio Ragosta, Eleonora Troja
Publikováno v:
The Astrophysical Journal Letters, Vol 949, Iss 2, p L39 (2023)
We report observations of the optical counterpart of the long gamma-ray burst GRB 221009A. Due to the extreme rarity of being both nearby ( z = 0.151) and highly energetic ( E _γ _,iso ≥ 10 ^54 erg), GRB 221009A offers a unique opportunity to prob
Externí odkaz:
https://doaj.org/article/63770d202d7543a686955aa76aa186d1
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:
Mridweeka Singh, Devendra. K. Sahu, Raya Dastidar, Barnabás Barna, Kuntal Misra, Anjasha Gangopadhyay, D. Andrew Howell, Saurabh W. Jha, Hyobin Im, Kirsty Taggart, Jennifer Andrews, Daichi Hiramatsu, Rishabh Singh Teja, Craig Pellegrino, Ryan J. Foley, Arti Joshi, G. C. Anupama, K. Azalee Bostroem, Jamison Burke, Yssavo Camacho-Neves, Anirban Dutta, Lindsey A. Kwok, Curtis McCully, Yen-Chen Pan, Matt Siebert, Shubham Srivastav, Tamás Szalai, Jonathan J. Swift, Grace Yang, Henry Zhou, Nico DiLullo, Jackson Scheer
Publikováno v:
The Astrophysical Journal, Vol 953, Iss 1, p 93 (2023)
We present the optical photometric and spectroscopic analysis of two Type Iax supernovae (SNe), 2018cni and 2020kyg. SN 2018cni is a bright Type Iax SN ( M _V _,peak = −17.81 ± 0.21 mag), whereas SN 2020kyg ( M _V _,peak = −14.52 ± 0.21 mag) is
Externí odkaz:
https://doaj.org/article/11889789405540c8bb1926f35120e116