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Identifying transient and variable sources in radio images

(2018)

Authors:

Antonia Rowlinson, Adam J Stewart, Jess W Broderick, John D Swinbank, Ralph AMJ Wijers, Dario Carbone, Yvette Cendes, Rob Fender, Alexander van der Horst, Gijs Molenaar, Bart Scheers, Tim Staley, Sean Farrell, Jean-Mathias Grießmeier, Martin Bell, Jochen Eislöffel, Casey J Law, Joeri van Leeuwen, Philippe Zarka

The Simons Observatory: Science goals and forecasts

(2018)

Authors:

The Simons Observatory Collaboration, Peter Ade, James Aguirre, Zeeshan Ahmed, Simone Aiola, Aamir Ali, David Alonso, Marcelo A Alvarez, Kam Arnold, Peter Ashton, Jason Austermann, Humna Awan, Carlo Baccigalupi, Taylor Baildon, Darcy Barron, Nick Battaglia, Richard Battye, Eric Baxter, Andrew Bazarko, James A Beall, Rachel Bean, Dominic Beck, Shawn Beckman, Benjamin Beringue, Federico Bianchini, Steven Boada, David Boettger, J Richard Bond, Julian Borrill, Michael L Brown, Sarah Marie Bruno, Sean Bryan, Erminia Calabrese, Victoria Calafut, Paolo Calisse, Julien Carron, Anthony Challinor, Grace Chesmore, Yuji Chinone, Jens Chluba, Hsiao-Mei Sherry Cho, Steve Choi, Gabriele Coppi, Nicholas F Cothard, Kevin Coughlin, Devin Crichton, Kevin D Crowley, Kevin T Crowley, Ari Cukierman, John M D'Ewart, Rolando Dünner, Tijmen de Haan, Mark Devlin, Simon Dicker, Joy Didier, Matt Dobbs, Bradley Dober, Cody J Duell, Shannon Duff, Adri Duivenvoorden, Jo Dunkley, John Dusatko, Josquin Errard, Giulio Fabbian, Stephen Feeney, Simone Ferraro, Pedro Fluxà, Katherine Freese, Josef C Frisch, Andrei Frolov, George Fuller, Brittany Fuzia, Nicholas Galitzki, Patricio A Gallardo, Jose Tomas Galvez Ghersi, Jiansong Gao, Eric Gawiser, Martina Gerbino, Vera Gluscevic, Neil Goeckner-Wald, Joseph Golec, Sam Gordon, Megan Gralla, Daniel Green, Arpi Grigorian, John Groh, Chris Groppi, Yilun Guan, Jon E Gudmundsson, Dongwon Han, Peter Hargrave, Masaya Hasegawa, Matthew Hasselfield, Makoto Hattori, Victor Haynes, Masashi Hazumi, Yizhou He, Erin Healy, Shawn W Henderson, Carlos Hervias-Caimapo, Charles A Hill, J Colin Hill, Gene Hilton, Matt Hilton, Adam D Hincks, Gary Hinshaw, Renée Hložek, Shirley Ho, Shuay-Pwu Patty Ho, Logan Howe, Zhiqi Huang, Johannes Hubmayr, Kevin Huffenberger, John P Hughes, Anna Ijjas, Margaret Ikape, Kent Irwin, Andrew H Jaffe, Bhuvnesh Jain, Oliver Jeong, Daisuke Kaneko, Ethan D Karpel, Nobuhiko Katayama, Brian Keating, Sarah S Kernasovskiy, Reijo Keskitalo, Theodore Kisner, Kenji Kiuchi, Jeff Klein, Kenda Knowles, Brian Koopman, Arthur Kosowsky, Nicoletta Krachmalnicoff, Stephen E Kuenstner, Chao-Lin Kuo, Akito Kusaka, Jacob Lashner, Adrian Lee, Eunseong Lee, David Leon, Jason S-Y Leung, Antony Lewis, Yaqiong Li, Zack Li, Michele Limon, Eric Linder, Carlos Lopez-Caraballo, Thibaut Louis, Lindsay Lowry, Marius Lungu, Mathew Madhavacheril, Daisy Mak, Felipe Maldonado, Hamdi Mani, Ben Mates, Frederick Matsuda, Loïc Maurin, Phil Mauskopf, Andrew May, Nialh McCallum, Chris McKenney, Jeff McMahon, P Daniel Meerburg, Joel Meyers, Amber Miller, Mark Mirmelstein, Kavilan Moodley, Moritz Munchmeyer, Charles Munson, Sigurd Naess, Federico Nati, Martin Navaroli, Laura Newburgh, Ho Nam Nguyen, Michael Niemack, Haruki Nishino, John Orlowski-Scherer, Lyman Page, Bruce Partridge, Julien Peloton, Francesca Perrotta, Lucio Piccirillo, Giampaolo Pisano, Davide Poletti, Roberto Puddu, Giuseppe Puglisi, Chris Raum, Christian L Reichardt, Mathieu Remazeilles, Yoel Rephaeli, Dominik Riechers, Felipe Rojas, Anirban Roy, Sharon Sadeh, Yuki Sakurai, Maria Salatino, Mayuri Sathyanarayana Rao, Emmanuel Schaan, Marcel Schmittfull, Neelima Sehgal, Joseph Seibert, Uros Seljak, Blake Sherwin, Meir Shimon, Carlos Sierra, Jonathan Sievers, Precious Sikhosana, Maximiliano Silva-Feaver, Sara M Simon, Adrian Sinclair, Praween Siritanasak, Kendrick Smith, Stephen R Smith, David Spergel, Suzanne T Staggs, George Stein, Jason R Stevens, Radek Stompor, Aritoki Suzuki, Osamu Tajima, Satoru Takakura, Grant Teply, Daniel B Thomas, Ben Thorne, Robert Thornton, Hy Trac, Calvin Tsai, Carole Tucker, Joel Ullom, Sunny Vagnozzi, Alexander van Engelen, Jeff Van Lanen, Daniel D Van Winkle, Eve M Vavagiakis, Clara Vergès, Michael Vissers, Kasey Wagoner, Samantha Walker, Jon Ward, Ben Westbrook, Nathan Whitehorn, Jason Williams, Joel Williams, Edward J Wollack, Zhilei Xu, Byeonghee Yu, Cyndia Yu, Fernando Zago, Hezi Zhang, Ningfeng Zhu

MUSE observations of M87: radial gradients for the stellar initial-mass function and the abundance of sodium

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 478:3 (2018) 4084-4100

Authors:

Marc Sarzi, Chiara Spiniello, Francesco La Barbera, Davor Krajnović, Remco van den Bosch

SN 2017ens: The Metamorphosis of a Luminous Broad-lined Type Ic Supernova into an SN IIn

(2018)

Authors:

T-W Chen, C Inserra, M Fraser, TJ Moriya, P Schady, T Schweyer, AV Filippenko, DA Perley, AJ Ruiter, I Seitenzahl, J Sollerman, F Taddia, JP Anderson, RJ Foley, A Jerkstrand, C-C Ngeow, Y-C Pan, A Pastorello, S Points, SJ Smartt, KW Smith, S Taubenberger, P Wiseman, DR Young, S Benetti, M Berton, F Bufano, P Clark, M Della Valle, L Galbany, A Gal-Yam, M Gromadzki, CP Gutiérrez, A Heinze, E Kankare, CD Kilpatrick, H Kuncarayakti, G Leloudas, Z-Y Lin, K Maguire, P Mazzali, O McBrien, SJ Prentice, A Rau, A Rest, MR Siebert, B Stalder, JL Tonry, P-C Yu

SPIRITS 16tn in NGC 3556: A Heavily Obscured and Low-luminosity Supernova at 8.8 Mpc

The Astrophysical Journal American Astronomical Society 863:1 (2018) 20

Authors:

Jacob E Jencson, Mansi M Kasliwal, Scott M Adams, Howard E Bond, Ryan M Lau, Joel Johansson, Assaf Horesh, Kunal P Mooley, Robert Fender, Kishalay De, Dónal O’Sullivan, Frank J Masci, Ann Marie Cody, Nadia Blagorodnova, Ori D Fox, Robert D Gehrz, Peter A Milne, Daniel A Perley, Nathan Smith, Schuyler D Van Dyk

Abstract:

We present the discovery by the SPitzer InfraRed Intensive Transients Survey (SPIRITS) of a likely supernova (SN) in NGC 3556 (M108) at only 8.8 Mpc that was not detected by optical searches. A luminous infrared (IR) transient at M[4.5] = −16.7 mag (Vega), SPIRITS 16tn is coincident with a dust lane in the inclined, star-forming disk of the host. Using observations in the IR, optical, and radio, we attempt to determine the nature of this event. We estimate AV ≈ 8–9 mag of extinction, placing it among the three most highly obscured IR-discovered SNe. The [4.5] light curve declined at a rate of 0.013 mag day−1, and the [3.6]–[4.5] color increased from 0.7 to ≳1.0 mag by 184.7 days post discovery. Optical/IR spectroscopy shows a red continuum but no clearly discernible features, preventing a definitive spectroscopic classification. Radio observations constrain the radio luminosity of SPIRITS 16tn to Lν ≲ 1024 erg s−1 Hz−1 between 3 and 15 GHz, excluding many varieties of core-collapse SNe. An SN Ia is ruled out by the observed IR color and lack of spectroscopic features from Fe-peak elements. SPIRITS 16tn was fainter at [4.5] than typical stripped-envelope SNe by ≈1 mag. Comparison of the spectral energy distribution to SNe II suggests that SPIRITS 16tn was both highly obscured and intrinsically dim, possibly akin to the low-luminosity SN 2005cs. We infer the presence of an IR dust echo powered by an initial peak luminosity of the transient of 5 × 1040 erg s−1 ≲ Lpeak ≲ 4 × 1043 erg s−1, consistent with the observed range for SNe II. This discovery illustrates the power of IR surveys to overcome the compounding effects of visible extinction and optically subluminous events in completing the inventory of nearby SNe.