Zobrazeno 1 - 10
of 669
pro vyhledávání: '"Kotak, R."'
Autor:
Killestein, T. L., Kelsey, L., Wickens, E., Nuttall, L., Lyman, J., Krawczyk, C., Ackley, K., Dyer, M. J., Jiménez-Ibarra, F., Ulaczyk, K., O'Neill, D., Kumar, A., Steeghs, D., Galloway, D. K., Dhillon, V. S., O'Brien, P., Ramsay, G., Noysena, K., Kotak, R., Breton, R. P., Pallé, E., Pollacco, D., Awiphan, S., Belkin, S., Chote, P., Clark, P., Coppejans, D., Duffy, C., Eyles-Ferris, R., Godson, B., Gompertz, B., Graur, O., Irawati, P., Jarvis, D., Julakanti, Y., Kennedy, M. R., Kuncarayakti, H., Levan, A., Littlefair, S., Magee, M., Mandhai, S., Sánchez, D. Mata, Mattila, S., McCormac, J., Mullaney, J., Munday, J., Patel, M., Pursiainen, M., Rana, J., Sawangwit, U., Stanway, E., Starling, R., Warwick, B., Wiersema, K.
Time-domain astrophysics continues to grow rapidly, with the inception of new surveys drastically increasing data volumes. Democratised, distributed approaches to training sets for machine learning classifiers are crucial to make the most of this tor
Externí odkaz:
http://arxiv.org/abs/2406.02334
Autor:
Moran, S., Kotak, R., Fraser, M., Pastorello, A., Cai, Y. -Z., Valerin, G., Mattila, S., Cappellaro, E., Kravtsov, T., Gutiérrez, C. P., Elias-Rosa, N., Reguitti, A., Lundqvist, P., Brink, T. G., Filippenko, A. V., Wang, X. -F.
We present results from a five-month-long observing campaign of the unusual transient AT 2022fnm, which displays properties common to both luminous red novae (LRNe) and intermediate-luminosity red transients (ILRTs). Although its photometric evolutio
Externí odkaz:
http://arxiv.org/abs/2406.02816
Autor:
Charalampopoulos, P., Kotak, R., Wevers, T., Leloudas, G., Kravtsov, T., Ramsden, P., Reynolds, T. M., Aamer, A., Anderson, J. P., Arcavi, I., Cai, Y. -Z., Chen, T. -W., Dennefeld, M., Galbany, L., Gromadzki, M., Gutiérrez, C. P., Ihanec, N., Kangas, T., Kankare, E., Kool, E., Lawrence, A., Makrygianni, L., Mattila, S., Müller-Bravo, T. E., Nicholl, M., Onori, F., Pursiainen, M., Sahu, A., Smartt, S. J., Sollerman, J., Wang, Y., Young, D. R.
We present an extensive analysis of the optical and UV properties of AT2023clx, the closest TDE to date, that occurred in the nucleus of the interacting LINER galaxy, NGC3799 (z=0.01107). From several standard methods, we estimate the mass of the cen
Externí odkaz:
http://arxiv.org/abs/2401.11773
Observations of type Ia supernova SN 2020nlb up to 600 days after explosion, and the distance to M85
Autor:
Williams, S. C., Kotak, R., Lundqvist, P., Mattila, S., Mazzali, P. A., Pastorello, A., Reguitti, A., Stritzinger, M. D., Fiore, A., Hook, I. M., Moran, S., Salmaso, I.
The type Ia supernova (SN Ia) SN 2020nlb was discovered in the Virgo Cluster galaxy M85 shortly after explosion. Here we present observations that include one of the earliest high-quality spectra and some of the earliest multi-colour photometry of a
Externí odkaz:
http://arxiv.org/abs/2401.08759
Autor:
Nagao, T., Patat, F., Cikota, A., Baade, D., Mattila, S., Kotak, R., Kuncarayakti, H., Bulla, M., Ayala, B.
Publikováno v:
A&A 681, A11 (2024)
The explosion processes of supernovae (SNe) are imprinted in their explosion geometries. Here, we study the intrinsic polarization of 15 hydrogen-rich core-collapse SNe and explore the relation with the photometric and spectroscopic properties. Our s
Externí odkaz:
http://arxiv.org/abs/2308.00996
Publikováno v:
A&A 678, A43 (2023)
We investigate polarization spectra of hydrogen-rich core-collapse supernovae (Type~II SNe). The polarization signal from SNe contains two independent components: intrinsic SN polarization and interstellar polarization (ISP). From these components, w
Externí odkaz:
http://arxiv.org/abs/2307.11455
Autor:
Patel, M., Gompertz, B. P., O'Brien, P. T., Lamb, G. P., Starling, R. L. C., Evans, P. A, Amati, L., Levan, A. J., Nicholl, M., Lyman, J., Ackley, K., Dyer, M. J., Ulaczyk, K., Steeghs, D., Galloway, D. K., Dhillon, V. S., Ramsay, G., Noysena, K., Kotak, R., Breton, R. P., Nuttall, L. K., Palle, E., Pollacco, D.
GRB 201015A is a peculiarly low luminosity, spectrally soft gamma-ray burst (GRB), with $T_{\rm 90} = 9.8 \pm 3.5$ s (time interval of detection of 90\% of photons from the GRB), and an associated supernova (likely to be type Ic or Ic-BL). GRB 201015
Externí odkaz:
http://arxiv.org/abs/2305.14491
Autor:
Kuncarayakti, H., Sollerman, J., Izzo, L., Maeda, K., Yang, S., Schulze, S., Angus, C. R., Aubert, M., Auchettl, K., Della Valle, M., Dessart, L., Hinds, K., Kankare, E., Kawabata, M., Lundqvist, P., Nakaoka, T., Perley, D., Raimundo, S. I., Strotjohann, N. L., Taguchi, K., Cai, Y. -Z., Charalampopoulos, P., Fang, Q., Fraser, M., Gutierrez, C. P., Imazawa, R., Kangas, T., Kawabata, K. S., Kotak, R., Kravtsov, T., Matilainen, K., Mattila, S., Moran, S., Murata, I., Salmaso, I., Anderson, J. P., Ashall, C., Bellm, E. C., Benetti, S., Chambers, K. C., Chen, T. -W., Coughlin, M., De Colle, F., Fremling, C., Galbany, L., Gal-Yam, A., Gromadzki, M., Groom, S. L., Hajela, A., Inserra, C., Kasliwal, M. M., Mahabal, A. A., Martin-Carrillo, A., Moore, T., Muller-Bravo, T. E., Nicholl, M., Ragosta, F., Riddle, R. L., Sharma, Y., Srivastav, S., Stritzinger, M. D., Wold, A., Young, D. R.
Publikováno v:
A&A 678, A209 (2023)
We report on our study of supernova (SN) 2022xxf based on observations obtained during the first four months of its evolution. The light curves (LCs) display two humps of similar maximum brightness separated by 75 days, unprecedented for a broad-line
Externí odkaz:
http://arxiv.org/abs/2303.16925
Autor:
Pan, Y. -C., Jheng, Y. -S., Jones, D. O., Lee, I. -Y., Foley, R. J., Chornock, R., Scolnic, D. M., Berger, E., Challis, P. M., Drout, M., Huber, M. E., Kirshner, R. P., Kotak, R., Lunnan, R., Narayan, G., Rest, A., Rodney, S., Smartt, S.
There is growing evidence that Type Ia supernovae (SNe Ia) may originate from multiple explosion channels. Previous studies have indicated that the ejecta velocity of SNe Ia is one powerful tool to discriminate between different channels. In this wor
Externí odkaz:
http://arxiv.org/abs/2211.06895
Autor:
Moran, S., Fraser, M., Kotak, R., Pastorello, A., Benetti, S., Brennan, S. J., Gutiérrez, C. P., Kankare, E., Kuncarayakti, H., Mattila, S., Reynolds, T. M., Anderson, J. P., Brown, P. J., Campana, S., Chambers, K. C., Chen, T. -W., Della Valle, M., Dennefeld, M., Elias-Rosa, N., Galbany, L., Galindo-Guil, F. J., Gromadzki, M., Hiramatsu, D., Inserra, C., Leloudas, G., Müller-Bravo, T. E., Nicholl, M., Reguitti, A., Shahbandeh, M., Smartt, S. J., Tartaglia, L., Young, D. R.
Publikováno v:
A&A 669, A51 (2023)
In this study we present the results of a five-year follow-up campaign of the long-lived type IIn supernova SN 2017hcc, found in a spiral dwarf host of near-solar metallicity. The long rise time (57 $\pm$ 2 days, ATLAS $o$ band) and high luminosity (
Externí odkaz:
http://arxiv.org/abs/2210.14076