Zobrazeno 1 - 10
of 416
pro vyhledávání: '"Pandey, S B"'
Autor:
Caballero-Garcia, M. D., Gogus, E., Navarro-Gonzalez, J., Uzuner, M., Castro-Tirado, A. J., Pandey, S. B., Gupta, Rahul, Ror, A. K., Hu, Y. D., Wu, S. Y., Sanchez-Ramirez, R., Guziy, S., Christiansen, F., Connell, P. H., Neubert, T., Ostgaard, N., Adsuara, J. E., Gordillo-Vazquez, F. J., Fernandez-Garcia, E., Perez-Garcia, I., Reglero, V.
We present a timing study of the gamma and X-ray observations and analysis of a sample of bright gamma-ray bursts (GRBs; i.e. GRB 180720B, GRB 181222B, GRB 211211A and GRB 220910A), including the very bright and long GRB 211211A (a.k.a. kilonova cand
Externí odkaz:
http://arxiv.org/abs/2411.18243
Prompt emission of GRB 230812B stands out as one of the most luminous events observed by both the Fermi-GBM and LAT. Prompt emission spectral analysis (both time-integrated and resolved) of this burst supports an additional thermal component together
Externí odkaz:
http://arxiv.org/abs/2409.13391
Autor:
Gupta, Rahul, Ror, A. K., Pandey, S. B., Racusin, J., Moss, M., Aryan, A., Klingler, N., Castro-Tirado, A. J.
We have analyzed the prompt and afterglow characteristics of the intermediate luminosity burst ``GRB 210210A". Our prompt emission analysis indicates that GRB 210210A is among the softest long GRBs detected by the Swift-BAT. The time-integrated promp
Externí odkaz:
http://arxiv.org/abs/2409.04871
Autor:
Gupta, Rahul, Pandey, S. B., Gupta, S., Chattopadhayay, T., Bhattacharya, D., Bhalerao, V., Castro-Tirado, A. J., Valeev, A., Ror, A. K., Sharma, V., Racusin, J., Aryan, A., Iyyani, S., Vadawale, S.
Publikováno v:
ApJ 972 166 (2024)
The radiation mechanism underlying the prompt emission remains unresolved and can be resolved using a systematic and uniform time-resolved spectro-polarimetric study. In this paper, we investigated the spectral, temporal, and polarimetric characteris
Externí odkaz:
http://arxiv.org/abs/2406.13755
Autor:
Castro-Tirado, A. J., Gupta, Rahul, Pandey, S. B., Guelbenzu, A. Nicuesa, Eikenberry, S., Ackley, K., Gerarts, A., Valeev, A. F., Jeong, S., Park, I. H., Oates, S. R., Zhang, B. -B., Sánchez-Ramírez, R., Martín-Carrillo, A., Tello, J. C., Jelínek, M., Hu, Y. -D., Cunniffe, R., Sokolov, V. V., Guziy, S., Ferrero, P., Caballero-García, M. D., Ror, A. K., Aryan, A., Tirado, M. A. Castro, Fernández-García, E., Gritsevich, M., Olivares, I., Pérez-García, I., Cerón, J. M. Castro, Cepa, J.
Dark GRBs constitute a significant fraction of the GRB population. In this paper, we present the multiwavelength analysis of an intense two-episodic GRB 150309A observed early on to ~114 days post-burst. Despite the strong gamma-ray emission, no opti
Externí odkaz:
http://arxiv.org/abs/2310.08503
Autor:
Hennessy, A., Starling, R. L. C., Rowlinson, A., de Ruiter, I., Kumar, A., Eyles-Ferris, R. A. J., Ror, A. K., Anderson, G. E., Gourdji, K., van der Horst, A. J., Pandey, S. B., Shimwell, T. W., Steeghs, D., Stylianou, N., ter Veen, S., Wiersema, K., Wijers, R. A. M. J.
Publikováno v:
MNRAS, 526, 106-117 (2023)
The composition of relativistic gamma-ray burst (GRB) jets and their emission mechanisms are still debated, and they could be matter or magnetically dominated. One way to distinguish these mechanisms arises because a Poynting flux dominated jet may p
Externí odkaz:
http://arxiv.org/abs/2308.16121
Publikováno v:
Bulletin de la Soci\'et\'e Royale des Sciences de Li\`ege, 2024, 93(2), 683-699
India has been actively involved in the follow-up observations of optical afterglows of gamma-ray bursts (GRBs) for more than two decades, using the country's meter-class facilities such as the 1.04 m Sampurnanand Telescope, 1.3 m Devasthal Fast Opti
Externí odkaz:
http://arxiv.org/abs/2307.15585
Autor:
Oates, S. R., Kuin, N. P. M., Nicholl, M., Marshall, F., Ridley, E., Boutsia, K., Breeveld, A. A., Buckley, D. A. H., Cenko, S. B., De Pasquale, M., Edwards, P. G., Gromadzki, M., Gupta, R., Laha, S., Morrell, N., Orio, M., Pandey, S. B., Page, M. J., Page, K. L., Parsotan, T., Rau, A., Schady, P., Stevens, J., Brown, P. J., Evans, P. A., Gronwall, C., Kennea, J. A., Klingler, N. J., Siegel, M. H., Tohuvavohu, A., Ambrosi, E., Barthelmy, S. D., Beardmore, A. P., Bernardini, M. G., Bonnerot, C., Campana, S., Caputo, R., Ciroi, S., Cusumano, G., D'Ai, A., D'Avanzo, P., D'Elia, V., Giommi, P., Hartmann, D. H., Krimm, H. A., Malesani, D. B., Melandri, A., Nousek, J. A., O'Brien, P. T., Osborne, J. P., Pagani, C., Palmer, D. M., Perri, M., Racusin, J. L., Sakamoto, T., Sbarufatti, B., Schlieder, J. E., Tagliaferri, G., Troja, E., Xu, D.
We report the discovery of Swift J221951-484240 (hereafter: J221951), a luminous slow-evolving blue transient that was detected by the Neil Gehrels Swift Observatory Ultra-violet/Optical Telescope (Swift/UVOT) during the follow-up of Gravitational Wa
Externí odkaz:
http://arxiv.org/abs/2307.01044
Autor:
Pandey, S. B., Kumar, Amit, Reddy, B. K., Yadav, S., Nanjappa, N., Aryan, Amar, Gupta, Rahul, Panwar, Neelam, Yadav, R. K. S.
The 4K$\times$4K CCD Imager is the first light instrument for the 3.6m Devasthal Optical Telescope and is producing broad-band imaging observations of many Galactic and extra-galactic sources since 2015-2016. Capabilities of the CCD Imager are demons
Externí odkaz:
http://arxiv.org/abs/2306.13698
Autor:
Ailawadhi, B., Dastidar, R., Misra, K., Roy, R., Hiramatsu, D., Howell, D. A., Brink, T. G., Zheng, W., Galbany, L., Shahbandeh, M., Arcavi, I., Ashall, C., Bostroem, K. A., Burke, J., Chapman, T., Dimple, Filippenko, A. V., Gangopadhyay, A., Ghosh, A., Hoffman, A. M., Hosseinzadeh, G., Jennings, C., Jha, V. K., Kumar, A., Karamehmetoglu, E., McCully, C., McGinness, E., Müller-Bravo, T. E., Murakami, Y. S., Pandey, S. B., Pellegrino, C., Piscarreta, L., Rho, J., Stritzinger, M., Sunseri, J., Van Dyk, S. D., Yadav, L.
We present high-cadence photometric and spectroscopic observations of SN~2020jfo in ultraviolet and optical/near-infrared bands starting from $\sim 3$ to $\sim 434$ days after the explosion, including the earliest data with the 10.4\,m GTC. SN~2020jf
Externí odkaz:
http://arxiv.org/abs/2211.02823