Now showing items 1-20 of 120

    • The Afterglow and Early-type Host Galaxy of the Short GRB 150101B at Z = 0.1343 

      Fong, W.; Margutti, R.; Chornock, R.; Berger, Edo; Shappee, B. J.; Levan, A. J.; Tanvir, N. R.; Smith, N.; Milne, P. A.; Laskar, T.; Fox, D. B.; Lunnan, R.; Blanchard, P. K.; Hjorth, J.; Wiersema, K.; van der Horst, A. J.; Zaritsky, D. (American Astronomical Society, 2016)
      We present the discovery of the X-ray and optical afterglows of the short-duration GRB 150101B, pinpointing the event to an early-type host galaxy at z = 0.1343±0.0030. This makes GRB 150101B the most nearby shortGRB with ...
    • The Afterglow and Environment of the Short Grb 111117a 

      Margutti, R; Berger, Edo; Fong, W; Zauderer, B; Cenko, S. B.; Greiner, J.; Soderberg, Alicia M.; Cucchiara, A.; Rossi, A.; Klose, S.; Schmidl, S.; Milisavljevic, Danny; Sanders, Nathan Edward (IOP Publishing, 2012)
      We present multi-wavelength observations of the afterglow of the short GRB 111117A, and follow-up observations of its host galaxy. From rapid optical and radio observations we place limits of r & 25.5 mag at δt ≈ 0.55 d ...
    • The Afterglow and Ulirg Host Galaxy of the Dark Short Grb 120804a 

      Berger, Edo; Zauderer, B; Levan, A.; Margutti, R.; Laskar, T.; Fong, W.; Mangano, V.; Fox, D. B.; Tunnicliffe, R. L.; Chornock, R.; Tanvir, N. R.; Menten, K. M.; Hjorth, J.; Roth, K.; Dupuy, T. J. (IOP Publishing, 2013)
      We present the optical discovery and sub-arcsecond optical and X-ray localization of the afterglow of the short GRB 120804A, as well as optical, near-IR, and radio detections of its host galaxy. X-ray observations with ...
    • ALMA Observations of the Host Galaxy of GRB 090423 at Z = 8.23: Deep Limits on Obscured Star formation 630 Million Years after the Big Bang. 

      Berger, Edo; Zauderer, B. A.; Chary, R.-R.; Laskar, T.; Chornock, R.; Tanvir, N. R.; Stanway, E. R.; Levan, A. J.; Levesque, E. M.; Davies, J. E. (IOP Publishing, 2014)
      We present rest-frame far-infrared (FIR) and optical observations of the host galaxy of GRB 090423 at z = 8.23 from the Atacama Large Millimeter Array (ALMA) and the Spitzer Space Telescope, respectively. The host remains ...
    • An Astrometric Search for a Sub-stellar Companion of the M8.5 Dwarf TVLM 513–46546 Using Very Long Baseline Interferometry 

      Forbrich, Jan; Berger, Edo; Reid, Mark Jonathan (IOP Publishing, 2013)
      We conducted multi-epoch VLBI observations to search for astrometric reflex motion caused by a sub-stellar companion of the M8.5 dwarf TVLM 513–46546. The observations yield an absolute parallax corresponding to a distance ...
    • A Beaming-Independent Estimate of the Energy Distribution of Long Gamma-Ray Bursts: Initial Results and Future Prospects 

      Shivvers, I.; Berger, Edo (IOP Publishing, 2011)
      We present single-epoch radio afterglow observations of 24 long-duration gamma-ray burst (GRB) on a timescale of & 100 d after the burst. These observations trace the afterglow evolution when the blastwave has decelerated ...
    • Birth of a relativistic outflow in the unusual γ-ray transient Swift J164449.3+573451 

      Zauderer, Bevin Ashley; Berger, Edo; Soderberg, Alicia M.; Loeb, Abraham; Narayan, Ramesh; Frail, D. A.; Petitpas, Glen Raymond; Brunthaler, A.; Chornock, Ryan T.; Carpenter, J. M.; Pooley, G. G.; Mooley, K.; Kulkarni, S. R.; Margutti, Raffaella; Fox, D. B.; Nakar, E.; Patel, Nimesh A.; Volgenau, N. H.; Culverhouse, T. L.; Bietenholz, M. F.; Rupen, M. P.; Max-Moerbeck, W.; Readhead, A. C. S.; Richards, J.; Shepherd, M.; Storm, S.; Hull, Charles L. H. (Springer Nature, 2011)
      Active galactic nuclei, which are powered by long-term accretion onto central supermassive black holes, produce1 relativistic jets with lifetimes of at least one million years, and the observation of the birth of such a ...
    • Characterization of the Benchmark Binary Nltt 33370 

      Schlieder, Joshua E.; Bonnefoy, Mickaël; Herbst, T. M.; Lépine, Sébastien; Berger, Edo; Henning, Thomas; Skemer, Andrew; Chauvin, Gaël; Rice, Emily; Biller, Beth; Girard, Julien H. V.; Lagrange, Anne-Marie; Hinz, Philip; Defrère, Denis; Bergfors, Carolina; Brandner, Wolfgang; Lacour, Sylvestre; Skrutskie, Michael; Leisenring, Jarron (IOP Publishing, 2014)
      We report the confirmation of the binary nature of the nearby, very low-mass system NLTT 33370 with adaptive optics imaging and present resolved near-infrared photometry and integrated light optical and near-infrared ...
    • Comparing Hα and H I Surveys as Means to a Complete Local Galaxy Catalog in the Advanced LIGO/Virgo Era 

      Berger, Edo; Metzger, Brian; Kaplan, David (IOP Publishing, 2013)
      Identifying the electromagnetic counterparts of gravitational wave (GW) sources detected by upcoming networks of advanced ground-based interferometers will be challenging due in part to the large number of unrelated ...
    • A Comprehensive Study of Detectability and Contamination in Deep Rapid Optical Searches for Gravitational Wave Counterparts 

      Cowperthwaite, Philip Steven; Berger, Edo (IOP Publishing, 2015)
      The first direct detection of gravitational waves (GW) by the ground-based Advanced LIGO/Virgo interferometers is expected to occur within the next few years. These interferometers are designed to detect the mergers of ...
    • Cosmological Constraints from Measurements of Type Ia Supernovae Discovered during the First 1.5 yr of the Pan-STARRS1 Survey 

      Rest, Armin Wolfgang; Scolnic, D.; Foley, R. J.; Huber, M. E.; Chornock, R.; Narayan, Gautham Siddharth; Tonry, J. L.; Berger, Edo; Soderberg, Alicia M.; Stubbs, Christopher William; Riess, A.; Kirshner, Robert P.; Smartt, S. J.; Schlafly, E.; Rodney, S.; Botticella, M. T.; Brout, D.; Challis, P.; Czekala, Ian Philip; Drout, Maria Rebecca; Hudson, M. J.; Kotak, R.; Leibler, C.; Lunnan, Ragnhild; Marion, G. H.; McCrum, M.; Milisavljevic, D.; Pastorello, A.; Sanders, Nathan Edward; Smith, K.; Stafford, E.; Thilker, D.; Valenti, S.; Wood-Vasey, W. M.; Zheng, Z.; Burgett, W. S.; Chambers, K. C.; Denneau, L.; Draper, P. W.; Flewelling, H.; Hodapp, K. W.; Kaiser, N.; Kudritzki, R.-P.; Magnier, E. A.; Metcalfe, N.; Price, P. A.; Sweeney, W.; Wainscoat, R.; Waters, C. (IOP Publishing, 2014)
      We present griz P1 light curves of 146 spectroscopically confirmed Type Ia supernovae (SNe Ia; 0.03 < z < 0.65) discovered during the first 1.5 yr of the Pan-STARRS1 Medium Deep Survey. The Pan-STARRS1 natural photometric ...
    • A Dark Energy Camera Search for an Optical Counterpart to the First Advanced Ligo Gravitational Wave Event Gw150914 

      Berger, Edo (American Astronomical Society, 2016)
      We report initial results of a deep search for an optical counterpart to the gravitational wave event GW150914, the first trigger from the Advanced LIGO gravitational wave detectors. We used the Dark Energy Camera (DECam) ...
    • A Dark Energy Camera Search for Missing Supergiants in the Lmc After the Advanced Ligo Gravitational-Wave Event Gw150914 

      Berger, Edo (American Astronomical Society, 2016)
      The collapse of the core of a star is expected to produce gravitational radiation. While this process will usually produce a luminous supernova, the optical signatue could be subluminous and a direct collapse to a black ...
    • A Decade of Short-Duration Gamma-Ray Burst Broad-Band Afterglows: Energetics, Circumburst Densities, and Jet Opening Angles 

      Fong, W.; Berger, Edo; Margutti, R; Zauderer, B (IOP Publishing, 2015)
      We present a comprehensive catalog and analysis of broad-band afterglow observations for 103 short duration gamma-ray bursts (GRBs), comprised of all short GRBs from November 2004 to March 2015 with prompt follow-up ...
    • A Decam Search for an Optical Counterpart to the Ligo Gravitational-Wave Event Gw151226 

      Cowperthwaite, Philip Steven; Berger, Edo; Soares-Santos, M.; Annis, J.; Brout, D.; Brown, D. A.; Buckley-Geer, E.; Cenko, S. B.; Chen, H. Y.; Chornock, R.; Diehl, H. T.; Doctor, Z.; Drlica-Wagner, A.; Drout, M. R.; Farr, B.; Finley, D. A.; Foley, R. J.; Fong, W.; Fox, D. B.; Frieman, J.; Garcia-Bellido, J.; Gill, M. S. S.; Gruendl, R. A.; Herner, K.; Holz, D. E.; Kasen, D.; Kessler, R.; Lin, H.; Margutti, R.; Marriner, J.; Matheson, T.; Metzger, B. D.; Neilsen Jr., E. H.; Quataert, E.; Rest, A.; Sako, M.; Scolnic, D.; Smith, N.; Sobreira, F.; Strampelli, G. M.; Villar, V. A.; Walker, A. R.; Wester, W.; Williams, Preston Noah; Yanny, B.; Abbott, T. M. C.; Abdalla, F. B.; Allam, S.; Armstrong, R.; Bechtol, K.; Benoit-Lévy, A.; Bertin, E.; Brooks, D.; Burke, D. L.; Rosell, A. Carnero; Kind, M. Carrasco; Carretero, J.; Castander, F. J.; Cunha, C. E.; D’Andrea, C. B.; Costa, L. N. da; Desai, S.; Dietrich, J. P.; Evrard, A. E.; Neto, A. Fausti; Fosalba, P.; Gerdes, D. W.; Giannantonio, T.; Goldstein, D. A.; Gruen, D.; Gutierrez, G.; Honscheid, K.; James, D. J.; Johnson, M. W. G.; Johnson, M. D.; Krause, E.; Kuehn, K.; Kuropatkin, N.; Lima, M.; Maia, M. A. G.; Marshall, J. L.; Menanteau, F.; Miquel, R.; Mohr, J. J.; Nichol, R. C.; Nord, B.; Ogando, R.; Plazas, A. A.; Reil, K.; Romer, A. K.; Sanchez, E.; Scarpine, V.; Sevilla-Noarbe, I.; Smith, R. C.; Suchyta, E.; Tarle, G.; Thomas, D.; Thomas, R. C.; Tucker, D. L.; Weller, J. (American Astronomical Society, 2016)
      We report the results of a Dark Energy Camera (DECam) optical follow-up of the gravitational wave (GW) event GW151226, discovered by the Advanced LIGO detectors. Our observations cover 28.8 deg2 of the localization region ...
    • Demographics of the Galaxies Hosting Short-Duration Gamma-Ray Bursts 

      Fong, W; Berger, Edo; Chornock, R; Margutti, R; Levan, A. J.; Tanvir, N. R.; Tunnicliffe, R. L.; Czekala, I.; Fox, D. B.; Perley, D. A.; Cenko, S. B.; Zauderer, B. A.; Laskar, T.; Persson, S. E.; Monson, A. J.; Kelson, D. D.; Birk, C.; Murphy, D.; Servillat, M.; Anglada, G. (IOP Publishing, 2013)
      We present observations of the afterglows and host galaxies of three short-duration gamma-ray bursts (GRBs): 100625A, 101219A and 110112A. We find that GRB 100625A occurred in a z = 0.452 early-type galaxy with a stellar ...
    • Detection of Radio Emission From the Hyperactive L Dwarf 2mass J13153094−2649513ab 

      Burgasser, Adam J.; Melis, Carl; Zauderer, B; Berger, Edo (IOP Publishing, 2012)
      We report the detection of radio emission from the unusually active L5e + T7 binary 2MASS J13153094−2649513AB made with the Australian Telescope Compact Array. Observations at 5.5 GHz reveal an unresolved source with a ...
    • Discovery of an Outflow from Radio Observations of the Tidal Disruption event ASASSN-14li 

      Alexander, K. D.; Berger, Edo; Guillochon, J.; Zauderer, B. A.; Williams, Peter Kelsey George (American Astronomical Society, 2016)
      We report the discovery of transient radio emission from the nearby optically-discovered TDE ASASSN-14li (distance of 90 Mpc), making it the first typical TDE detected in the radio, and unambiguously pointing to the formation ...
    • Discovery of Radio Afterglow from the Most Distant Cosmic Explosion 

      Chandra, Poonam; Frail, Dale A.; Fox, Derek; Kulkarni, Shrinivas; Berger, Edo; Cenko, S. Bradley; Bock, Douglas C.-J.; Harrsion, Fiona; Kasliwal, Mansi (IOP Publishing, 2010)
      We report the discovery of radio afterglow emission from the gamma-ray burst GRB 090423, which exploded at a redshift of 8.3, making it the object with the highest known redshift in the Universe. By combining our radio ...
    • Discovery of the Very Red Near-Infrared and Optical Afterglow of the Short-Duration Grb 070724a 

      Berger, Edo; Cenko, S. B.; Fox, D. B.; Cucchiara, A. (IOP Publishing, 2009)
      We report the discovery of the near-infrared and optical afterglow of the short-duration gamma-ray burst GRB 070724A. The afterglow is detected in iJHKs observations starting 2.3 hr after the burst with Ks = 19.59± 0.16 ...