• The Afterglows Of Swift-Era Gamma-Ray Bursts. II. Type I GRB Versus Type II GRB Optical Afterglows 

      Kann, D. A.; Klose, S.; Zhang, B.; Covino, S.; Butler, N. R.; Malesani, D.; Nakar, E.; Wilson, A. C.; Antonelli, L. A.; Chincarini, G.; Cobb, B. E.; D'Avanzo, P.; D'Elia, V.; Della Valle, M.; Ferrero, P.; Fugazza, D.; Gorosabel, J.; Israel, G. L.; Mannucci, F.; Piranomonte, S.; Schulze, S.; Stella, L.; Tagliaferri, G.; Wiersema, K. (2011-06)
      Gamma-ray bursts (GRBs) have been separated into two classes, originally along the lines of duration and spectral properties, called "short/hard" and "long/soft." The latter have been conclusively linked to the explosive ...
    • The Bolocam Galactic Plane Survey: Lambda = 1.1 And 0.35 Mm Dust Continuum Emission In The Galactic Center Region 

      Bally, John; Aguirre, James; Battersby, Cara; Bradley, Eric Todd; Cyganowski, Claudia; Dowell, Darren; Drosback, Meredith; Dunham, Miranda K.; Evans, Neal J.; Ginsburg, Adam; Glenn, Jason; Harvey, Paul; Mills, Elisabeth; Merello, Manuel; Rosolowsky, Erik; Schlingman, Wayne; Shirley, Yancy L.; Stringfellow, Guy S.; Walawender, Josh; Williams, Jonathan (2010-09)
      The Bolocam Galactic Plane Survey (BGPS) data for a 6 deg(2) region of the Galactic plane containing the Galactic center are analyzed and compared to infrared and radio continuum data. The BGPS 1.1 mm emission consists of ...
    • Bullet Cluster: A Challenge To Lambda CDM Cosmology 

      Lee, Jounghun; Komatsu, Eiichiro (2010-07)
      To quantify how rare the bullet-cluster-like high-velocity merging systems are in the standard Lambda cold dark matter (CDM) cosmology, we use a large-volume (27 h(-3) Gpc(3)) cosmological N-body MICE simulation to calculate ...
    • Comprehensive Observations Of The Bright And Energetic Type Lax Sn 2012Z: Interpretation As A Chandrasekhar Mass White Dwarf Explosion 

      Stritzinger, M. D.; Valenti, S.; Hoeflich, P.; Baron, E.; Phillips, M. M.; Taddia, F.; Foley, R. J.; Hsiao, E. Y.; Jha, S. W.; McCully, C.; Pandya, V.; Simon, J. D.; Benetti, S.; Brown, P. J.; Burns, C. R.; Campillay, A.; Contreras, C.; Forster, F.; Holmbo, S.; Marion, G. H.; Morrell, N.; Pignata, G. (2015-01)
      We present ultraviolet through near-infrared (NIR) broadband photometry, and visual-wavelength and NIR spectroscopy of the Type lax supernova (SN) 2012Z. The data set consists of both early- and late-time observations, ...
    • Discovery Of A Cosmological, Relativistic Outburst Via Its Rapidly Fading Optical Emission 

      Cenko, S. Bradley; Kulkarni, S. R.; Horesh, Assaf; Corsi, Alessandra; Fox, Derek B.; Carpenter, John; Frail, Dale A.; Nugent, Peter E.; Perley, Daniel A.; Gruber, D.; Gal-Yam, Avishay; Groot, Paul J.; Hallinan, G.; Ofek, Eran O.; Rau, Arne; MacLeod, Chelsea L.; Miller, Adam A.; Bloom, Joshua S.; Filippenko, Alexei V.; Kasliwal, Mansi M.; Law, Nicholas M.; Morgan, Adam N.; Polishook, David; Poznanski, Dovi; Quimby, Robert M.; Sesar, Branimir; Shen, Ken J.; Silverman, Jeffrey M.; Sternberg, Assaf (2013-06)
      We report the discovery by the Palomar Transient Factory (PTF) of the transient source PTF11agg, which is distinguished by three primary characteristics: (1) bright (R-peak = 18.3mag), rapidly fading (Delta R = 4mag in ...
    • Discovery, Progenitor and Early Evolution of A Stripped Envelope Supernova iPTF13bvn 

      Cao, Yi; Kasliwal, Mansi M.; Arcavi, Iair; Horesh, Assaf; Hancock, Paul; Valenti, Stefano; Cenko, S. Bradley; Kulkarni, S. R.; Gal-Yam, Avishay; Gorbikov, Evgeny; Ofek, Eran O.; Sand, David; Yaron, Ofer; Graham, Melissa; Silverman, Jeffrey M.; Wheeler, J. Craig; Marion, G. H.; Walker, Emma S.; Mazzali, Paolo; Howell, D. Andrew; Li, K. L.; Kong, A. K. H.; Bloom, Joshua S.; Nugent, Peter E.; Surace, Jason; Masci, Frank; Carpenter, John; Degenaar, Nathalie; Gelino, Christopher R. (2013-09)
      The intermediate Palomar Transient Factory reports our discovery of a young supernova, iPTF13bvn, in the nearby galaxy, NGC 5806 (22.5 Mpc). Our spectral sequence in the optical and infrared suggests a Type Ib classification. ...
    • Disk-Jet Connection In The Radio Galaxy 3C 120 

      Chatterjee, Ritaban; Marscher, Alan P.; Jorstad, Svetlana G.; Olmstead, Alice R.; McHardy, Ian M.; Aller, Margo F.; Aller, Hugh D.; Lahteenmaki, Anne; Tornikoski, Merja; Hovatta, Talvikki; Marshall, Kevin; Miller, H. Richard; Ryle, Wesley T.; Chicka, Benjamin; Benker, A. J.; Bottorff, Mark C.; Brokofsky, David; Campbell, Jeffrey S.; Chonis, Taylor S.; Gaskell, C. Martin; Gaynullina, Evelina R.; Grankin, Konstantin N.; Hedrick, Cecelia H.; Ibrahimov, Mansur A.; Klimek, Elizabeth S.; Kruse, Amanda K.; Masatoshi, Shoji; Miller, Thomas R.; Pan, Hong-Jian; Petersen, Eric A.; Peterson, Bradley W.; Shen, Zhiqiang; Strel'nikov, Dmitriy V.; Tao, Jun; Watkins, Aaron E.; Wheeler, Kathleen (2009-10)
      We present the results of extensive multi-frequency monitoring of the radio galaxy 3C 120 between 2002 and 2007 at X-ray (2-10 keV), optical (R and V bands), and radio (14.5 and 37 GHz) wave bands, as well as imaging with ...
    • Dual Supermassive Black Hole Candidates In The AGN And Galaxy Evolution Survey 

      Comerford, Julia M.; Schluns, Kyle; Greene, Jenny E.; Cool, Richard J. (2013-11)
      Dual supermassive black holes (SMBHs) with kiloparsec-scale separations in merger-remnant galaxies are informative tracers of galaxy evolution, but the avenue for identifying them in large numbers for such studies is not ...
    • Early-Time Light Curves Of Type Ib/c Supernovae From The SDSS-II Supernova Survey 

      Taddia, F.; Sollerman, J.; Leloudas, G.; Stritzinger, M. D.; Valenti, S.; Galbany, L.; Kessler, R.; Schneider, D. P.; Wheeler, J. C. (2015-02)
      Context. Type Ib/c supernovae (SNe Ib/c) have been investigated in several single-object studies; however, there is still a paucity of works concerning larger, homogeneous samples of these hydrogen-poor transients, in ...
    • The Effect Of Environment On Shear In Strong Gravitational Lenses 

      Wong, Kenneth C.; Keeton, Charles R.; Williams, Kurtis A.; Momcheva, Ivelina G.; Zabludoff, Ann I. (2011-01)
      Using new photometric and spectroscopic data in the fields of nine strong gravitational lenses that lie in galaxy groups, we analyze the effects of both the local group environment and line-of-sight (LOS) galaxies on the ...
    • Fe II Emission In Active Galactic Nuclei: The Role Of Total And Gas-Phase Iron Abundance 

      Shields, Gregory A.; Ludwig, Randi R.; Salviander, Sarah (2010-10)
      Active galactic nuclei (AGNs) have Fe II emission from the broad-line region (BLR) that differs greatly in strength from object to object. We examine the role of the total and gas-phase iron abundance in determining Fe II ...
    • Galaxy Kinematics With Virus-P: The Dark Matter Halo Of M87 

      Murphy, Jeremy D.; Gebhardt, Karl; Adams, Joshua J. (2011-03)
      We present two-dimensional stellar kinematics of M87 out to R = 238 '' taken with the integral field spectrograph VIRUS-P. We run a large set of axisymmetric, orbit-based dynamical models and find clear evidence for a ...
    • The Gould's Belt Very Large Array Survey. I. The Ophiuchus Complex 

      Dzib, Sergio A.; Loinard, Laurent; Mioduszewski, Amy J.; Rodriguez, Luis F.; Ortiz-Leon, Gisela N.; Pech, Gerardo; Rivera, Juana L.; Torres, Rosa M.; Boden, Andrew F.; Hartmann, Lee; Evans, Neal J.; Briceno, Cesar; Tobin, John (2013-09)
      We present large-scale (similar to 2000 arcmin(2)), deep (similar to 20 mu Jy), high-resolution (similar to 1 '') radio observations of theOphiuchus star-forming complex obtained with the Karl G. Jansky Very Large Array ...
    • The Gould's Belt Very Large Array Survey. III. The Orion Region 

      Kounkel, Marina; Hartmann, Lee; Loinard, Laurent; Mioduszewski, Amy J.; Dzib, Sergio A.; Ortiz-Leon, Gisela N.; Rodriguez, Luis F.; Pech, Gerardo; Rivera, Juana L.; Torres, Rosa M.; Boden, Andrew F.; Evans, Neal J.; Briceno, Cesar; Tobin, John (2014-07)
      We present results from a high-sensitivity (60 mu Jy), large-scale (2.26 deg(2)) survey obtained with the Karl G. Jansky Very Large Array as part of the Gould's Belt Survey program. We detected 374 and 354 sources at 4.5 ...
    • GRB 081008: From Burst To Afterglow And The Transition Phase In Between 

      Yuan, F.; Schady, Patricia; Racusin, J. L.; Willingale, R.; Kruhler, T.; O'Brien, P. T.; Greiner, J.; Oates, S. R.; Rykoff, E. S.; Aharonian, F.; Akerlof, C. W.; Ashley, M. C. B.; Barthelmy, S. D.; Filgas, R.; Flewelling, H. A.; Gehrels, N.; Gogus, E.; Guver, T.; Horns, D.; Kiziloglu, U.; Krimm, H. A.; McKay, T. A.; Ozel, M. E.; Phillips, A.; Quimby, Robert M.; Rowell, G.; Rujopakarn, W.; Schaefer, B. E.; Vestrand, W. T.; Wheeler, J. Craig; Wren, J. (2010-03)
      We present a multi-wavelength study of GRB 081008, at redshift 1.967, by Swift, ROTSE-III, and Gamma-Ray Burst Optical/NearInfrared Detector. Compared to other Swift GRBs, GRB 081008 has a typical gamma-ray isotropic ...
    • A High-Resolution Spectroscopic Search For The Remaining Donor For Tycho's Supernova 

      Kerzendorf, Wolfgang E.; Yong, David; Schmidt, Brian P.; Simon, Joshua D.; Jeffery, C. Simon; Anderson, Jay; Podsiadlowski, Phillipp; Gal-Yam, Avishay; Silverman, Jeffrey M.; Filippenko, Alexei V.; Nomoto, Kenichi; Murphy, Simon J.; Bessell, Michael S.; Venn, Kim A.; Foley, Ryan J. (2013-09)
      In this paper, we report on our analysis using Hubble Space Telescope astrometry and Keck-I HIRES spectroscopy of the central six stars of Tycho's supernova remnant (SN 1572). With these data, we measured the proper motions, ...
    • How Bad Or Good Are the External forward Shock Afterglow Models of Gamma-Ray Bursts? 

      Wang, Xiang-Gao; Zhang, Bing; Liang, En-Wei; Gao, He; Li, Liang; Deng, Can-Min; Qin, Song-Mei; Tang, Qing-Wen; Kann, D. Alexander; Ryde, Felix; Kumar, Pawan (2015-07)
      The external forward shock models have been the standard paradigm to interpret the broadband afterglow data of gamma-ray bursts (GRBs). One prediction of the models is that some afterglow temporal breaks at different energy ...
    • HST-COS Observations of Hydrogen, Helium, Carbon, and Nitrogen Emissions From the SN 1987A Reverse Shock 

      France, Kevin; McCray, Richard; Penton, Steven V.; Kirshner, Robert P.; Challis, Peter; Laming, J. Martin; Bouchet, Patrice; Chevalier, Roger; Garnavich, Peter M.; Fransson, Claes; Heng, Kevin; Larsson, Josefin; Lawrence, Stephen; Lundqvist, Peter; Panagia, Nino; Pun, Chun S. J.; Smith, Nathan; Sollerman, Jesper; Sonneborn, George; Sugerman, Ben; Wheeler, J. Craig (2011-12)
      We present the most sensitive ultraviolet observations of Supernova 1987A to date. Imaging spectroscopy from the Hubble Space Telescope-Cosmic Origins Spectrograph shows many narrow (Delta upsilon similar to 300 km s(-1)) ...
    • Magnetic Fields In Relativistic Collisionless Shocks 

      Santana, Rodolfo; Duran, Rodolfo Barniol; Kumar, Pawan (2014-04)
      We present a systematic study on magnetic fields in gamma-ray burst (GRB) external forward shocks (FSs). There are 60 (35) GRBs in our X-ray (optical) sample, mostly from Swift. We use two methods to study is an element ...