Search Results - "Kotak, R."

The nebular spectra of SN 2012aw and constraints on stellar nucleosynthesis from oxygen emission lines by Jerkstrand, A., Smartt, S. J., Fraser, M., Fransson, C., Sollerman, J., Taddia, F., Kotak, R.

“…We present nebular-phase optical and near-infrared spectroscopy of the Type IIP supernova SN 2012aw combined with non-local thermodynamic equilibrium radiative…”
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Exploring the diversity of double-detonation explosions for Type Ia supernovae: effects of the post-explosion helium shell composition by Magee, M R, Maguire, K, Kotak, R, Sim, S A

“…ABSTRACT The detonation of a helium shell on top of a carbon–oxygen white dwarf has been argued as a potential explosion mechanism for Type Ia supernovae…”
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The Complete Light-curve Sample of Spectroscopically Confirmed SNe Ia from Pan-STARRS1 and Cosmological Constraints from the Combined Pantheon Sample by Scolnic, D. M., Jones, D. O., Rest, A., Pan, Y. C., Chornock, R., Foley, R. J., Huber, M. E., Kessler, R., Narayan, G., Riess, A. G., Rodney, S., Berger, E., Brout, D. J., Challis, P. J., Drout, M., Finkbeiner, D., Lunnan, R., Kirshner, R. P., Sanders, N. E., Schlafly, E., Smartt, S., Stubbs, C. W., Tonry, J., Wood-Vasey, W. M., Foley, M., Hand, J., Johnson, E., Burgett, W. S., Chambers, K. C., Draper, P. W., Hodapp, K. W., Kaiser, N., Kudritzki, R. P., Magnier, E. A., Metcalfe, N., Bresolin, F., Gall, E., Kotak, R., McCrum, M., Smith, K. W.

“…We present optical light curves, redshifts, and classifications for spectroscopically confirmed Type Ia supernovae (SNe Ia) discovered by the Pan-STARRS1 (PS1)…”
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The host galaxy and late-time evolution of the superluminous supernova PTF12dam by Chen, T.-W., Smartt, S. J., Jerkstrand, A., Nicholl, M., Bresolin, F., Kotak, R., Polshaw, J., Rest, A., Kudritzki, R., Zheng, Z., Elias-Rosa, N., Smith, K., Inserra, C., Wright, D., Kankare, E., Kangas, T., Fraser, M.

“…Superluminous supernovae (SLSNe) of Type Ic have a tendency to occur in faint host galaxies which are likely to have low mass and low metallicity. PTF12dam is…”
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Measuring Dark Energy Properties with Photometrically Classified Pan-STARRS Supernovae. II. Cosmological Parameters by Jones, D. O., Scolnic, D. M., Riess, A. G., Rest, A., Kirshner, R. P., Berger, E., Kessler, R., Pan, Y.-C., Foley, R. J., Chornock, R., Ortega, C. A., Challis, P. J., Burgett, W. S., Chambers, K. C., Draper, P. W., Flewelling, H., Huber, M. E., Kaiser, N., Kudritzki, R.-P., Metcalfe, N., Tonry, J., Wainscoat, R. J., Waters, C., Gall, E. E. E., Kotak, R., McCrum, M., Smartt, S. J., Smith, K. W.

“…We use 1169 Pan-STARRS supernovae (SNe) and 195 low-z (z < 0.1) SNe Ia to measure cosmological parameters. Though most Pan-STARRS SNe lack spectroscopic…”
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A dust-enshrouded tidal disruption event with a resolved radio jet in a galaxy merger by Mattila, S, Pérez-Torres, M, Efstathiou, A, Mimica, P, Fraser, M, Kankare, E, Alberdi, A, Aloy, M Á, Heikkilä, T, Jonker, P G, Lundqvist, P, Martí-Vidal, I, Meikle, W P S, Romero-Cañizales, C, Smartt, S J, Tsygankov, S, Varenius, E, Alonso-Herrero, A, Bondi, M, Fransson, C, Herrero-Illana, R, Kangas, T, Kotak, R, Ramírez-Olivencia, N, Väisänen, P, Beswick, R J, Clements, D L, Greimel, R, Harmanen, J, Kotilainen, J, Nandra, K, Reynolds, T, Ryder, S, Walton, N A, Wiik, K, Östlin, G

“…Tidal disruption events (TDEs) are transient flares produced when a star is ripped apart by the gravitational field of a supermassive black hole (SMBH). We…”
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Searching for electromagnetic counterparts to gravitational-wave merger events with the prototype Gravitational-Wave Optical Transient Observer (GOTO-4) by Gompertz, B P, Cutter, R, Steeghs, D, Galloway, D K, Lyman, J, Ulaczyk, K, Dyer, M J, Ackley, K, Dhillon, V S, O’Brien, P T, Ramsay, G, Poshyachinda, S, Kotak, R, Nuttall, L, Breton, R P, Pallé, E, Pollacco, D, Thrane, E, Aukkaravittayapun, S, Awiphan, S, Brown, M J I, Burhanudin, U, Chote, P, Chrimes, A A, Daw, E, Duffy, C, Eyles-Ferris, R A J, Heikkilä, T, Irawati, P, Kennedy, M R, Killestein, T, Levan, A J, Littlefair, S, Makrygianni, L, Marsh, T, Mata Sánchez, D, Mattila, S, Maund, J, McCormac, J, Mkrtichian, D, Mong, Y -L, Mullaney, J, Müller, B, Obradovic, A, Rol, E, Sawangwit, U, Stanway, E R, Starling, R L C, Strøm, P A, Tooke, S, West, R, Wiersema, K

“…ABSTRACT We report the results of optical follow-up observations of 29 gravitational-wave (GW) triggers during the first half of the LIGO–Virgo Collaboration…”
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SUPER-LUMINOUS TYPE Ic SUPERNOVAE: CATCHING A MAGNETAR BY THE TAIL by Inserra, C, Smartt, S J, JERKSTRAND, A, Valenti, S, Fraser, M, Wright, D, Smith, K, Chen, T-W, Kotak, R, Pastorello, A

“…We report extensive observational data for five of the lowest redshift Super-Luminous Type Ic Supernovae (SL-SNe Ic) discovered to date, namely, PTF10hgi,…”
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Late-time H/He-poor Circumstellar Interaction in the Type Ic Supernova SN 2021ocs: An Exposed Oxygen–Magnesium Layer and Extreme Stripping of the Progenitor by Kuncarayakti, H., Maeda, K., Dessart, L., Nagao, T., Fulton, M., Gutiérrez, C. P., Huber, M. E., Young, D. R., Kotak, R., Mattila, S., Anderson, J. P., Ferrari, L., Folatelli, G., Gao, H., Magnier, E., Smith, K. W., Srivastav, S.

“…Abstract Supernova (SN) 2021ocs was discovered in the galaxy NGC 7828 ( z = 0.01911) within the interacting system Arp 144 and subsequently classified as a…”
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Machine learning for transient discovery in Pan-STARRS1 difference imaging by Wright, D. E., Smartt, S. J., Smith, K. W., Miller, P., Kotak, R., Rest, A., Burgett, W. S., Chambers, K. C., Flewelling, H., Hodapp, K. W., Huber, M., Jedicke, R., Kaiser, N., Metcalfe, N., Price, P. A., Tonry, J. L., Wainscoat, R. J., Waters, C.

“…Efficient identification and follow-up of astronomical transients is hindered by the need for humans to manually select promising candidates from data streams…”
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Chandra X-ray constraints on the candidate Ca-rich gap transient SN 2016hnk by Sell, P H, Arur, K, Maccarone, T J, Kotak, R, Knigge, C, Sand, D J, Valenti, S

“…Abstract We present a Chandra observation of SN 2016hnk, a candidate Ca-rich gap transient. This observation was specifically designed to test whether or not…”
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The fastest unbound star in our Galaxy ejected by a thermonuclear supernova by Geier, S., Fürst, F., Ziegerer, E., Kupfer, T., Heber, U., Irrgang, A., Wang, B., Liu, Z., Han, Z., Sesar, B., Levitan, D., Kotak, R., Magnier, E., Smith, K., Burgett, W. S., Chambers, K., Flewelling, H., Kaiser, N., Wainscoat, R., Waters, C.

“…Hypervelocity stars (HVSs) travel with velocities so high that they exceed the escape velocity of the Galaxy. Several acceleration mechanisms have been…”
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The Type Ic SN 2007gr: a census of the ejecta from late-time optical–infrared spectra by Mazzali, Paolo A., Maurer, I., Valenti, S., Kotak, R., Hunter, D.

“…Nebular spectra of supernovae (SNe) offer an unimpeded view of the inner region of the ejecta, where most nucleosynthesis takes place. Optical spectra cover…”
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COMMON ENVELOPE EJECTION FOR A LUMINOUS RED NOVA IN M101 by Blagorodnova, N., Kotak, R., Polshaw, J., Kasliwal, M. M., Cao, Y., Cody, A. M., Doran, G. B., Elias-Rosa, N., Fraser, M., Fremling, C., Gonzalez-Fernandez, C., Harmanen, J., Jencson, J., Kankare, E., Kudritzki, R.-P., Kulkarni, S. R., Magnier, E., Manulis, I., Masci, F. J., Mattila, S., Nugent, P., Ochner, P., Pastorello, A., Reynolds, T., Smith, K., Sollerman, J., Taddia, F., Terreran, G., Tomasella, L., Turatto, M., Vreeswijk, P. M., Wozniak, P., Zaggia, S.

“…ABSTRACT We present the results of optical, near-infrared, and mid-infrared observations of M101 OT2015-1 (PSN J14021678+5426205), a luminous red transient in…”
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Comparison of progenitor mass estimates for the Type IIP SN 2012A by Tomasella, L., Cappellaro, E., Fraser, M., Pumo, M. L., Pastorello, A., Pignata, G., Benetti, S., Bufano, F., Dennefeld, M., Harutyunyan, A., Iijima, T., Jerkstrand, A., Kankare, E., Kotak, R., Magill, L., Nascimbeni, V., Ochner, P., Siviero, A., Smartt, S., Sollerman, J., Stanishev, V., Taddia, F., Taubenberger, S., Turatto, M., Valenti, S., Wright, D. E., Zampieri, L.

“…We present the one-year long observing campaign of SN 2012A which exploded in the nearby (9.8 Mpc) irregular galaxy NGC 3239. The photometric evolution is that…”
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Superluminous supernovae from PESSTO by Nicholl, M., Smartt, S. J., Jerkstrand, A., Inserra, C., Anderson, J. P., Baltay, C., Benetti, S., Chen, T.-W., Elias-Rosa, N., Feindt, U., Fraser, M., Gal-Yam, A., Hadjiyska, E., Howell, D. A., Kotak, R., Lawrence, A., Leloudas, G., Margheim, S., Mattila, S., McCrum, M., McKinnon, R., Mead, A., Nugent, P., Rabinowitz, D., Rest, A., Smith, K. W., Sollerman, J., Sullivan, M., Taddia, F., Valenti, S., Walker, E. S., Young, D. R.

“…We present optical spectra and light curves for three hydrogen-poor superluminous supernovae followed by the Public ESO Spectroscopic Survey of Transient…”
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The Gravitational-wave Optical Transient Observer (GOTO): prototype performance and prospects for transient science by Steeghs, D, Galloway, D K, Ackley, K, Dyer, M J, Lyman, J, Ulaczyk, K, Cutter, R, Mong, Y-L, Dhillon, V, O’Brien, P, Ramsay, G, Poshyachinda, S, Kotak, R, Nuttall, L K, Pallé, E, Breton, R P, Pollacco, D, Thrane, E, Aukkaravittayapun, S, Awiphan, S, Burhanudin, U, Chote, P, Chrimes, A, Daw, E, Duffy, C, Eyles-Ferris, R, Gompertz, B, Heikkilä, T, Irawati, P, Kennedy, M R, Killestein, T, Kuncarayakti, H, Levan, A J, Littlefair, S, Makrygianni, L, Marsh, T, Mata-Sanchez, D, Mattila, S, Maund, J, McCormac, J, Mkrtichian, D, Mullaney, J, Noysena, K, Patel, M, Rol, E, Sawangwit, U, Stanway, E R, Starling, R, Strøm, P, Tooke, S, West, R, White, D J, Wiersema, K

“…ABSTRACT The Gravitational-wave Optical Transient Observer (GOTO) is an array of wide-field optical telescopes, designed to exploit new discoveries from the…”
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The Diversity of Type Ia Supernovae: Evidence for Systematics? by Benetti, S, Cappellaro, E, Mazzali, P. A, Turatto, M, Altavilla, G, Bufano, F, Elias-Rosa, N, Kotak, R, Pignata, G, Salvo, M, Stanishev, V

“…The photometric and spectroscopic properties of 26 well-observed Type Ia Supernovae (SNe Ia) were analyzed with the aim of exploring SN Ia diversity. The…”
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Slow-blue nuclear hypervariables in PanSTARRS-1 by Lawrence, A., Bruce, A. G., MacLeod, C., Gezari, S., Elvis, M., Ward, M., Smartt, S. J., Smith, K. W., Wright, D., Fraser, M., Marshall, P., Kaiser, N., Burgett, W., Magnier, E., Tonry, J., Chambers, K., Wainscoat, R., Waters, C., Price, P., Metcalfe, N., Valenti, S., Kotak, R., Mead, A., Inserra, C., Chen, T. W., Soderberg, A.

“…We discuss 76 large amplitude transients (Δm > 1.5) occurring in the nuclei of galaxies, nearly all with no previously known active galactic nucleus (AGN)…”
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Dead or Alive? Long-term evolution of SN 2015bh (SNhunt275) by Elias-Rosa, N, Pastorello, A, Benetti, S, Cappellaro, E, Taubenberger, S, Terreran, G, Fraser, M, Brown, P J, Tartaglia, L, Morales-Garoffolo, A, Harmanen, J, Richardson, N D, Artigau, E, Tomasella, L, Margutti, R, Smartt, S J, Dennefeld, M, Turatto, M, Anupama, G C, Arbour, R, Berton, M, Bjorkman, K S, Boles, T, Briganti, F, Chornock, R, Ciabattari, F, Cortini, G, Dimai, A, Gerhartz, C J, Itagaki, K, Kotak, R, Mancini, R, Martinelli, F, Milisavljevic, D, Misra, K, Ochner, P, Patnaude, D, Polshaw, J, Sahu, D K, Zaggia, S

“…Supernova (SN) 2015bh (or SNhunt275) was discovered in NGC 2770 on 2015 February with an absolute magnitude of Mr ~ -13.4 mag, and was initially classified as…”
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