Zobrazeno 1 - 10
of 81
pro vyhledávání: '"Koff, Robert"'
Autor:
Chen, Ping, Dong, Subo, Ashall, Chris, Benetti, S., Bersier, D., Bose, S., Brimacombe, Joseph, Brink, Thomas G., Buckley, David A. H., Cappellaro, Enrico, Christie, Grant W., Elias-Rosa, N., Filippenko, Alexei V., Gromadzki, Mariusz, Holoien, Thomas W. -S., Hu, Shaoming, Kochanek, C. S., Koff, Robert, Kollmeier, Juna A., Lundqvist, P., Mattila, S., Milne, Peter A., Munoz, J. A., Mutel, Robert, Natusch, Tim, Nicolas, Joel, Pastorello, A., Prentice, Simon, Prieto, J. L., Roth, Tyler, Shappee, B. J., Stone, Geoffrey, Stanek, K. Z., Stritzinger, M. D., Thompson, Todd A., Tomasella, Lina, Villanueva, Steven
Using data from the Complete Nearby ($z_{host}<0.02$) sample of Type Ia Supernovae (CNIa0.02), we discover a linear relation between two parameters derived from the $B-V$ color curves of Type Ia supernovae: the "color stretch" $s_{BV}$ and the rising
Externí odkaz:
http://arxiv.org/abs/2112.13364
Autor:
Chen, Ping, Dong, Subo, Kochanek, C. S., Stanek, K. Z., Post, R. S., Stritzinger, M. D., Prieto, J. L., Filippenko, Alexei V., Kollmeier, Juna A., Elias-Rosa, N., Katz, Boaz, Tomasella, Lina, Bose, S., Ashall, Chris, Benetti, S., Bersier, D., Brimacombe, Joseph, Brink, Thomas G., Brown, P., Buckley, David A. H., Cappellaro, Enrico, Christie, Grant W., Fraser, Morgan, Gromadzki, Mariusz, Holoien, Thomas W. -S., Hu, Shaoming, Kankare, Erkki, Koff, Robert, Lundqvist, P., Mattila, S., Milne, P. A., Morrell, Nidia, Munoz, J. A., Mutel, Robert, Natusch, Tim, Nicolas, Joel, Pastorello, A., Prentice, Simon, Roth, Tyler, Shappee, B. J., Stone, Geoffrey, Thompson, Todd A., Villanueva, Steven, Zheng, WeiKang
Publikováno v:
ApJS, 259, 53 (2022)
The CNIa0.02 project aims to collect a complete, nearby sample of Type Ia supernovae (SNe Ia) light curves, and the SNe are volume-limited with host-galaxy redshifts z_host < 0.02. The main scientific goal is to infer the distributions of key propert
Externí odkaz:
http://arxiv.org/abs/2011.02461
Autor:
Boyd, David R. S., Koff, Robert A.
Publikováno v:
J.Br.Astron.Assoc. 128 (2018) 269-272
V909 Cas is a little-studied example of a \b{eta} Cep pulsating variable located in the OB association Cas OB8 in the Perseus spiral arm of the Milky Way. Photometric observations in 2016-7 provided 30 new times of pulsation extrema and enabled its m
Externí odkaz:
http://arxiv.org/abs/1804.00214
Autor:
Patterson, Joseph, Stone, Geoffrey, Kemp, Jonathan, Skillman, David, de Miguel, Enrique, Potter, Michael, Starkey, Donn, Uthas, Helena, Jones, Jim, Slauson, Douglas, Koff, Robert, Myers, Gordon, Menzies, Kenneth, Campbell, Tut, Roberts, George, Foote, Jerry, Vanmunster, Tonny, Cook, Lewis M., Krajci, Thomas, Ogmen, Yenal, Sabo, Richard, Seargeant, Jim
We report a long-term (1961-2017) study of the eclipse times in the dwarf nova WZ Sagittae, in an effort to learn its rate of orbital-period change. Some wiggles with a time scale of 20-50 years are apparent, and a connection with the 23-year interva
Externí odkaz:
http://arxiv.org/abs/1801.00189
Autor:
Patterson, Joseph, Uthas, Helena, Kemp, Jonathan, de Miguel, Enrique, Krajci, Thomas, Foote, Jerry, Hambsch, Franz-Josef, Campbell, Tut, Roberts, George, Cejudo, David, Dvorak, Shawn, Vanmunster, Tonny, Koff, Robert, Skillman, David, Harvey, David, Martin, Brian, Rock, John, Boyd, David, Oksanen, Arto, Morelle, Etienne, Ulowetz, Joseph, Kroes, Anthony, Sabo, Richard, Jensen, Lasse
We summarize the results of a 20-year campaign to study the light curves of BK Lyncis, a nova-like star strangely located below the 2-3 hour orbital period gap in the family of cataclysmic variables. Two apparent "superhumps" dominate the nightly lig
Externí odkaz:
http://arxiv.org/abs/1212.5836
Autor:
Shears, Jeremy, Koff, Robert, Masi, Gianluca, de Miguel, Enrique, Miller, Ian, Roberts, George, Sabo, Richard, Stein, William, Ulowetz, Joseph
In 2011 October an optical transient was reported in Pegasus as a possible nova. The object had an ultraviolet counterpart, GALEX J215818.5+241924. In this paper we present follow-up photometry of the object which revealed the presence of superhumps,
Externí odkaz:
http://arxiv.org/abs/1205.0898
Autor:
Kato, Taichi, Maehara, Hiroyuki, Miller, Ian, Ohshima, Tomohito, de Miguel, Enrique, Tanabe, Kenji, Imamura, Kazuyoshi, Akazawa, Hidehiko, Kunitomi, Nanae, Takagi, Ryosuke, Nose, Mikiha, Hambsch, Franz-Josef, Kiyota, Seiichiro, Pavlenko, Elena P., Baklanov, Aleksei V., Antonyuk, Oksana I., Samsonov, Denis, Sosnovskij, Aleksei, Antonyuk, Kirill, Andreev, Maksim V., Morelle, Etienne, Dubovsky, Pavol A., Kudzej, Igor, Oksanen, Arto, Masi, Gianluca, Krajci, Thomas, Pickard, Roger D., Sabo, Richard, Itoh, Hiroshi, Stein, William, Dvorak, Shawn, Henden, Arne, Nakagawa, Shinichi, Noguchi, Ryo, Iino, Eriko, Matsumoto, Katsura, Nishitani, Hiroki, Aoki, Tomoya, Kobayashi, Hiroshi, Akasaka, Chihiro, Bolt, Greg, Shears, Jeremy, Ruiz, Javier, Shugarov, Sergey Yu., Chochol, Drahomir, Parakhin, Nikolai A., Monard, Berto, Shiokawa, Kazuhiko, Kasai, Kiyoshi, Staels, Bart, Miyashita, Atsushi, Starkey, Donn R., Ogmen, Yenal, Littlefield, Colin, Katysheva, Natalia, Sergey, Ivan M., Denisenko, Denis, Tordai, Tamas, Fidrich, Robert, Goranskij, Vitaly P., Virtanen, Jani, Crawford, Tim, Pietz, Jochen, Koff, Robert A., Boyd, David, Brady, Steve, James, Nick, Goff, William N., Itagaki, Koh-ichi, Nishimura, Hideo, Nakashima, Youichirou, Yoshida, Seiichi, Stubbings, Rod, Poyner, Gary, Maeda, Yutaka, Korotkiy, Stanislav A., Sokolovsky, Kirill V., Ueda, Seiji
Continuing the project described by Kato et al. (2009, PASJ 61, S395, arXiv:0905.1757), we collected times of superhump maxima for 51 SU UMa-type dwarf novae mainly observed during the 2010-2011 season. Although most of the new data for systems with
Externí odkaz:
http://arxiv.org/abs/1108.5252
We report unfiltered photometry of the first confirmed outburst of the AM CVn system SDSS J012940.05+384210.4 during 2009 December. At its brightest the star was magnitude 14.5, 5.4 magnitudes above mean quiescence. Although the first part of the out
Externí odkaz:
http://arxiv.org/abs/1104.0107
Publikováno v:
J.Br.Astron.Assoc. 121 (2011) 233-236
During the outburst of V713 Cephei in August 2009 the times of 8 eclipses were measured and these, together with 5 eclipse timings obtained during quiescence in August 2007, provide an improved orbital period of 0.085418432(4)d. No superhumps were ob
Externí odkaz:
http://arxiv.org/abs/1012.0138
We report unfiltered photometry during the first confirmed superoutburst of the recently discovered dwarf nova, SDSS J073208.11+413008.7 and conclude that it is a member of the SU UMa family. At its brightest, the star was magnitude 15.7. The outburs
Externí odkaz:
http://arxiv.org/abs/1005.5378