Zobrazeno 1 - 10
of 50
pro vyhledávání: '"A. J. Nayana"'
Autor:
Giulia Migliori, R. Margutti, B. D. Metzger, R. Chornock, C. Vignali, D. Brethauer, D. L. Coppejans, T. Maccarone, L. Rivera Sandoval, J. S. Bright, T. Laskar, D. Milisavljevic, E. Berger, A. J. Nayana
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 1, p L24 (2024)
We present the first deep X-ray observations of luminous fast blue optical transient (LFBOT) AT 2018cow at ∼3.7 yr since discovery, together with the reanalysis of the observation at δ t ∼ 220 days. X-ray emission is significantly detected at a
Externí odkaz:
https://doaj.org/article/00f566ea293e46778ab2f4f352b06703
Autor:
Mo, Geoffrey, De, Kishalay, Wiston, Eli, J., Nayana A., Margutti, Raffaella, Frostig, Danielle, Sollerman, Jesper, Sharma, Yashvi, Moriya, Takashi J., Burdge, Kevin B., Jencson, Jacob, Karambelkar, Viraj R., Lourie, Nathan P.
Type Ia supernovae arise from the thermonuclear explosions of white dwarfs in multiple star systems. A rare sub-class of SNe Ia exhibit signatures of interaction with circumstellar material (CSM), allowing for direct constraints on companion material
Externí odkaz:
http://arxiv.org/abs/2410.14644
Autor:
Hajela, A., Alexander, K. D., Margutti, R., Chornock, R., Bietenholz, M., Christy, C. T., Stroh, M., Terreran, G., Saxton, R., Komossa, S., Bright, J. S., Ramirez-Ruiz, E., Coppejans, D. L., Leung, J. K., Cendes, Y., Wiston, E., Laskar, T., Horesh, A., Schroeder, G., J., Nayana A., Wieringa, M. H., Velez, N., Berger, E., Blanchard, P. K., Eftekhari, T., Gomez, S., Nicholl, M., Sears, H., Zauderer, B. A.
We present the results from an extensive follow-up campaign of the Tidal Disruption Event (TDE) ASASSN-15oi spanning $\delta t \sim 10 - 3000$ d, offering an unprecedented window into the multiwavelength properties of a TDE during its first $\approx
Externí odkaz:
http://arxiv.org/abs/2407.19019
Autor:
Ho, Anna Y. Q., Perley, Daniel A., Chen, Ping, Schulze, Steve, Dhillon, Vik, Kumar, Harsh, Suresh, Aswin, Swain, Vishwajeet, Bremer, Michael, Smartt, Stephen J., Anderson, Joseph P., Anupama, G. C., Awiphan, Supachai, Barway, Sudhanshu, Bellm, Eric C., Ben-Ami, Sagi, Bhalerao, Varun, de Boer, Thomas, Brink, Thomas G., Burruss, Rick, Chandra, Poonam, Chen, Ting-Wan, Chen, Wen-Ping, Cooke, Jeff, Coughlin, Michael W., Das, Kaustav K., Drake, Andrew J., Filippenko, Alexei V., Freeburn, James, Fremling, Christoffer, Fulton, Michael D., Gal-Yam, Avishay, Galbany, Lluís, Gao, Hua, Graham, Matthew J., Gromadzki, Mariusz, Gutiérrez, Claudia P., Hinds, K-Ryan, Inserra, Cosimo, J., Nayana A., Karambelkar, Viraj, Kasliwal, Mansi M., Kulkarni, Shri, Müller-Bravo, Tomás E., Magnier, Eugene A., Mahabal, Ashish A., Moore, Thomas, Ngeow, Chow-Choong, Nicholl, Matt, Ofek, Eran O., Omand, Conor M. B., Onori, Francesca, Pan, Yen-Chen, Pessi, Priscila J., Petitpas, Glen, Polishook, David, Poshyachinda, Saran, Pursiainen, Miika, Riddle, Reed, Rodriguez, Antonio C., Rusholme, Ben, Segre, Enrico, Sharma, Yashvi, Smith, Ken W., Sollerman, Jesper, Srivastav, Shubham, Strotjohann, Nora Linn, Suhr, Mark, Svinkin, Dmitry, Wang, Yanan, Wiseman, Philip, Wold, Avery, Yang, Sheng, Yang, Yi, Yao, Yuhan, Young, David R., Zheng, WeiKang
In recent years, certain luminous extragalactic optical transients have been observed to last only a few days. Their short observed duration implies a different powering mechanism from the most common luminous extragalactic transients (supernovae) wh
Externí odkaz:
http://arxiv.org/abs/2311.10195
Autor:
Gangopadhyay, Anjasha, Maeda, Keiichi, Singh, Avinash, J., Nayana A., Nakaoka, Tatsuya, Kawabata, Koji S, Taguchi, Kenta, Singh, Mridweeka, Chandra, Poonam, Ryder, Stuart D, Dastidar, Raya, Yamanaka, Masayuki, Kawabata, Miho, Alsaberi, Rami Z. E., Dukiya, Naveen, Teja, Rishabh Singh, Ailawadhi, Bhavya, Dutta, Anirban, Sahu, D. K., Moriya, Takashi J, Misra, Kuntal, Tanaka, Masaomi, Chevalier, Roger, Tominaga, Nozomu, Uno, Kohki, Imazawa, Ryo, Hamada, Taisei, Hori, Tomoya, Isoga, Keisuke
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 a SN~IIb to a SN~Ib; prominent H$\alpha$ seen in the pre-maximum phase diminishes toward
Externí odkaz:
http://arxiv.org/abs/2309.07463
Autor:
Teja, Rishabh Singh, Singh, Avinash, Basu, Judhajeet, Anupama, G. C., Sahu, D. K., Dutta, Anirban, Swain, Vishwajeet, Nakaoka, Tatsuya, Pathak, Utkarsh, Bhalerao, Varun, Barway, Sudhanshu, Kumar, Harsh, J., Nayana A., Imazawa, Ryo, Kumar, Brajesh, Kawabata, Koji S
Publikováno v:
The Astrophysical Journal Letters, 954:L12 (10pp), 2023 September 1
We present early-phase panchromatic photometric and spectroscopic coverage spanning far-ultraviolet (FUV) to the near-infrared (NIR) regime of the nearest hydrogen-rich core-collapse supernova in the last 25 years, SN 2023ixf. We observe early 'flash
Externí odkaz:
http://arxiv.org/abs/2306.10284
Publikováno v:
The Astrophysical Journal, Volume 951, Number 1, 62 (2023)
Very high energy (VHE; 100 GeV $<$ E $\leq$ 100 TeV) and high energy (HE; 100 MeV $<$ E $\leq$ 100 GeV) gamma-rays were observed from the symbiotic recurrent nova RS Ophiuchi (RS Oph) during its outburst in August 2021, by various observatories such
Externí odkaz:
http://arxiv.org/abs/2305.10735
Autor:
Shivkumar, Hinna, Jaodand, Amruta D., Balasubramanian, Arvind, Fremling, Christoffer, Corsi, Alessandra, Tzanidakis, Anastasios, Nissanke, Samaya, Kasliwal, Mansi, Brightman, Murray, Raaijmakers, Geert, Madsen, Kristin Kruse, Harrison, Fiona, Carbone, Dario, J., Nayana A., Désert, Jean-Michel, Andreoni, Igor
We present optical, radio and X-ray observations of a rapidly-evolving transient AT2019wxt (PS19hgw), discovered during the search for an electromagnetic (EM) counterpart to the gravitational-wave (GW) trigger S191213g (LIGO Scientific Collaboration
Externí odkaz:
http://arxiv.org/abs/2208.09010
Autor:
Teja, Rishabh Singh, Singh, Avinash, Sahu, D. K., Anupama, G. C., Kumar, Brajesh, J, Nayana A.
Publikováno v:
The Astrophysical Journal, 930:34 (19pp), 2022 May 1
We present spectroscopic and photometric observations of the Type IIP supernova, SN 2020jfo, in ultraviolet and optical wavelengths. SN 2020jfo occurred in the spiral galaxy M61 (NGC 4303), with eight observed supernovae in the past 100 years. SN 202
Externí odkaz:
http://arxiv.org/abs/2202.09412
Autor:
Yao, Yuhan, Ho, Anna Y. Q., Medvedev, Pavel, J., Nayana A., Perley, Daniel A., Kulkarni, S. R., Chandra, Poonam, Sazonov, Sergey, Gilfanov, Marat, Khorunzhev, Georgii, Khatami, David K., Sunyaev, Rashid
We present AT2020mrf (SRGe J154754.2$+$443907), an extra-galactic ($z=0.1353$) fast blue optical transient (FBOT) with a rise time of $t_{g,\rm rise}=3.7$ days and a peak luminosity of $M_{g,\rm peak}=-20.0$. Its optical spectrum around peak shows a
Externí odkaz:
http://arxiv.org/abs/2112.00751