Now showing items 1-20 of 38

    • 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 ...
    • 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 ...
    • Displaying the heterogeneity of the SN 2002CX-like subclass of type IA supernovae with observations of the pan-starrs-1 discovered sn 2009ku 

      Narayan, G.; Foley, R. J.; Berger, Edo; Botticella, M. T.; Chornock, R; Huber, M. E.; Rest, A.; Scolnic, D.; Smartt, S.; Valenti, S.; Soderberg, Alicia M.; Burgett, W. S.; Chambers, K. C.; Flewelling, H. A.; Gates, G.; Grav, T.; Kaiser, N.; Kirshner, R. P.; Magnier, E. A.; Morgan, J. S.; Price, P. A.; Riess, A. G.; Stubbs, Christopher William; Sweeney, W. E.; Tonry, J. L.; Wainscoat, R. J.; Waters, C.; Wood-Vasey, W. M. (IOP Publishing, 2011)
      SN 2009ku, discovered by Pan-STARRS-1, is a Type Ia supernova (SN Ia), and a member of the distinct SN 2002cx-like class of SNe Ia. Its light curves are similar to the prototypical SN 2002cx, but are slightly broader and ...
    • The Dual-Axis Circumstellar Environment of the Type IIn Supernova 1997eg 

      Hoffman, Jennifer L.; Leonard, Douglas C.; Chornock, Ryan T.; Filippenko, Alexei V.; Barth, Aaron J.; Matheson, Thomas (Institute of Physics, 2008)
      We present multi-epoch spectral and spectropolarimetric observations of the Type IIn supernova (SN) 1997eg that indicate the presence of a flattened disk-like concentration of circumstellar material surrounding nonspherical ...
    • First Results from Pan-STARRS1: Faint, High Proper Motion White Dwarfs in the Medium-Deep Fields 

      Tonry, J. L.; Stubbs, Christopher William; Kilic, Muhlis; Flewelling, H. A.; Deacon, N. R.; Chornock, R; Berger, Edo; Burgett, W. S.; Chambers, K. C.; Kaiser, N.; Kudritzki, R.-P.; Hodapp, K. W.; Magnier, E. A.; Morgan, J. S.; Price, P. A.; Wainscoat, R. J. (IOP Publishing, 2011)
      The Pan-STARRS1 survey has obtained multi-epoch imaging in five bands (Pan-STARRS1 gP1, rP1, iP1, zP1, and yP1) on twelve “Medium Deep Fields”, each of which spans a 3.3 degree circle. For the period between Apr 2009 and ...
    • Galex and Pan-Starrs1 Discovery of SN IIP 2010 aq: The First Few Days After Shock Breakout in a Red Supergiant Star 

      Gezari, S.; Rest, A.; Huber, M. E.; Narayan, G.; Forster, K.; Neill, J. D.; Martin, D. C.; Valenti, S.; Smartt, S. J.; Chornock, R; Berger, Edo; Soderberg, Alicia M.; Mattila, S.; Kankare, E.; Burgett, W. S.; Chambers, K. C.; Dombeck, T.; Grav, T.; Heasley, J. N.; Hodapp, K. W.; Jedicke, R.; Kaiser, N.; Kudritzki, R.; Luppino, G.; Lupton, R. H.; Magnier, E. A.; Monet, D. G.; Morgan, J. S.; Onaka, P. M.; Price, P. A.; Rhoads, P. H.; Siegmund, W. A.; Stubbs, Christopher William; Tonry, J. L.; Wainscoat, R. J.; Waterson, M. F.; Wynn-Williams, C. G. (IOP Publishing, 2010)
      We present the early UV and optical light curve of Type IIP supernova (SN) 2010aq at z = 0.0862, and compare it to analytical models for thermal emission following SN shock breakout in a red supergiant star. SN 2010aq was ...
    • GALEX Detection of Shock Breakout in Type IIP Supernova PS1-13arp: Implications for the Progenitor Star Wind 

      Gezari, S.; Jones, D. O.; Sanders, Nathan Edward; Soderberg, Alicia M.; Hung, T.; Heinis, S.; Smartt, S. J.; Rest, A.; Scolnic, D.; Chornock, R; Berger, Edo; Foley, R. J.; Huber, M. E.; Price, P.; Stubbs, Christopher William; Riess, A. G.; Kirshner, Robert P.; Smith, K.; Wood-Vasey, W. M.; Schiminovich, D.; Martin, D. C.; Burgett, W. S.; Chambers, K. C.; Flewelling, H.; Kaiser, N.; Tonry, J. L.; Wainscoat, R. (IOP Publishing, 2015)
      We present the GALEX detection of a UV burst at the time of explosion of an optically normal supernova (SN) IIP (PS1-13arp) from the Pan-STARRS1 survey at z = 0.1665. The temperature and luminosity of the UV burst match ...
    • GRB 130606A as a Probe of the Intergalactic Medium and the Interstellar Medium in a Star-forming Galaxy in the First Gyr After the Big Bang 

      Chornock, Ryan; Berger, Edo; Fox, Derek B.; Lunnan, Ragnhild; Drout, Maria Rebecca; Fong, Wen-fai; Laskar, Tanmoy; Roth, Katherine C. (IOP Publishing, 2013)
      We present high signal-to-noise ratio Gemini and MMT spectroscopy of the optical afterglow of the gamma-ray burst (GRB) 130606A at redshift z=5.913, discovered by Swift. This is the first high-redshift GRB afterglow to ...
    • Host Galaxy Properties of the Subluminous GRB 120422A/SN 2012bz 

      Levesque, Emily M.; Chornock, Ryan; Soderberg, Alicia M.; Berger, Edo; Lunnan, Ragnhild (IOP Publishing, 2012)
      GRB 120422A is a nearby (z = 0.283) long-duration GRB (LGRB) detected by Swift with Eγ,iso ∼ 4.5 × 1049 erg. It is also associated with the spectroscopically-confirmed broad-lined Type Ic SN 2012bz. These properties establish ...
    • The host-galaxy response to the afterglow of GRB 100901A 

      Hartoog, O. E.; Wiersema, K.; Vreeswijk, P. M.; Kaper, L.; Tanvir, N. R.; Savaglio, S.; Berger, Edo; Chornock, R; Covino, S.; D, V.; Flores, H.; Fynbo, J. P. U.; Goldoni, P.; Gomboc, A.; Melandri, A.; Pozanenko, A.; Schaye, J.; Postigo, A. d. U.; Wijers, R. A. M. J. (Oxford University Press (OUP), 2013)
      For Gamma-Ray Burst 100901A, we have obtained Gemini-North and Very Large Telescope optical afterglow spectra at four epochs: one hour, one day, three days and one week after the burst, thanks to the afterglow remaining ...
    • An Independent Measurement of the Incidence of MgII Absorbers along Gamma-Ray Burst Sightlines: the End of the Mystery? 

      Cucchiara, A.; Prochaska, J. X.; Zhu, G.; Ménard, B.; Fynbo, J. P. U.; Fox, D. B.; Chen, H.-W.; Cooksey, K. L.; Cenko, S. B.; Perley, D.; Bloom, J. S.; Berger, Edo; Tanvir, N. R.; D, V.; Lopez, S.; Chornock, R; de Jaeger, T. (IOP Publishing, 2013)
      In 2006, Prochter et al. reported a statistically significant enhancement of very strong Mg II absorption systems intervening the sightlines to gamma-ray bursts (GRBs) relative to the incidence of such absorption along ...
    • A Jet Break in the X-Ray Light Curve of Short Grb 111020a: Implications for Energetics and Rates 

      Fong, W; Berger, Edo; Margutti, R; Zauderer, B; Troja, E.; Czekala, Ian Philip; Chornock, R; Gehrels, N.; Sakamoto, T.; Fox, D. B.; Podsiadlowski, P. (IOP Publishing, 2012)
      We present broad-band observations of the afterglow and environment of the short GRB 111020A. An extensive X-ray light curve from Swift/XRT, XMM-Newton and Chandra, spanning ∼ 100 seconds to 10 days after the burst, reveals ...
    • Metallicity in the Grb 100316d/sn 2010bh Host Complex 

      Levesque, Emily M.; Berger, Edo; Soderberg, Alicia M.; Chornock, Ryan (IOP Publishing, 2011)
      The recent long-duration GRB 100316D, associated with supernova SN 2010bh and detected by Swift, is one of the nearest GRB-SNe ever observed (z = 0.059). This provides us with a unique opportunity to study the explosion ...
    • Metamorphosis of Sn 2014c: Delayed Interaction Between a Hydrogen Poor Core-Collapse Supernova and a Nearby Circumstellar Shell 

      Milisavljevic, Danny; Margutti, R; Kamble, Atish; Patnaude, Daniel James; Raymond, John Charles; Eldridge, J. J.; Fong, W.; Bietenholz, M.; Challis, Peter M.; Chornock, R; Drout, Maria Rebecca; Fransson, C.; Fesen, R. A.; Grindlay, Jonathan E.; Kirshner, Robert P.; Lunnan, R; Mackey, J.; Miller, George Franklin; Parrent, Jerod T.; Sanders, Nathan Edward; Soderberg, Alicia M.; Zauderer, B (IOP Publishing, 2015)
      We present optical observations of supernova SN 2014C, which underwent an unprecedented slow metamorphosis from H-poor type Ib to H-rich type IIn over the course of one year. The observed spectroscopic evolution is consistent ...
    • The optical afterglow and z = 0.92 early-type host galaxy of the short GRB 100117A 

      Fong, W; Berger, Edo; Chornock, R; Tanvir, N. R.; Levan, A. J.; Fruchter, A. S.; Graham, J. F.; Cucchiara, A.; Fox, D. B. (IOP Publishing, 2011)
      We present the discovery of the optical afterglow and early-type host galaxy of the short-duration GRB 100117A. The faint afterglow is detected 8.3 hr after the burst with rAB = 25.46 ± 0.20 mag. Follow-up optical and ...
    • Pan-STARRS1 Discovery of Two Ultraluminous Supernovae at z ≈ 0.9 

      Chomiuk, Laura B; Chornock, Ryan T.; Soderberg, Alicia M.; Berger, Edo; Chevalier, R. A.; Foley, R. J.; Huber, M. E.; Narayan, Gautham Siddharth; Rest, A.; Gezari, S.; Kirshner, Robert P.; Riess, A.; Rodney, S. A.; Smartt, S. J.; Stubbs, Christopher William; Tonry, J. L.; Wood-Vasey, W. M.; Burgett, W. S.; Chambers, K. C.; Czekala, Ian Philip; Flewelling, H.; Forster, K.; Kaiser, N.; Kudritzki, R.-P.; Magnier, E. A.; Martin, D. C.; Morgan, J. S.; Neill, J. D.; Price, P. A.; Roth, K. C.; Sanders, Nathan Edward; Wainscoat, R. J. (IOP Publishing, 2011)
      We present the discovery of two ultraluminous supernovae (SNe) at z ≈ 0.9 with the Pan-STARRS1 Medium Deep Survey. These SNe, PS1-10ky and PS1-10awh, are among the most luminous SNe ever discovered, comparable to the unusual ...
    • A Panchromatic View of the Restless Sn 2009ip Reveals the Explosive Ejection of a Massive Star Envelope 

      Margutti, R.; Milisavljevic, Danny; Soderberg, Alicia M.; Chornock, R; Zauderer, B; Murase, K.; Guidorzi, C.; Sanders, Nathan Edward; Kuin, P.; Fransson, C.; Levesque, E. M.; Chandra, P.; Berger, Edo; Bianco, F. B.; Brown, P. J.; Challis, P.; Chatzopoulos, E.; Cheung, C. C.; Choi, C.; Chomiuk, L.; Chugai, N.; Contreras, C.; Drout, M. R.; Fesen, R.; Foley, R. J.; Fong, W.; Friedman, A. S.; Gall, C.; Gehrels, N.; Hjorth, J.; Hsiao, E.; Kirshner, R.; Im, M.; Leloudas, G.; Lunnan, R.; Marion, G. H.; Martin, J.; Morrell, N.; Neugent, K. F.; Omodei, N.; Phillips, M. M.; Rest, A.; Silverman, J. M.; Strader, J.; Stritzinger, M. D.; Szalai, T.; Utterback, N. B.; Vinko, J.; Wheeler, J. C.; Arnett, D.; Campana, S.; Chevalier, R.; Ginsburg, A.; Kamble, A.; Roming, P. W. A.; Pritchard, T.; Stringfellow, G. (IOP Publishing, 2013)
      The double explosion of SN 2009ip in 2012 raises questions about our understanding of the late stages of massive star evolution. Here we present a comprehensive study of SN 2009ip during its remarkable rebrightenings. ...
    • PS1-10afx at z = 1.388: Pan-STARRS1 Discovery of a New Type of Superluminous Supernova 

      Chornock, Ryan T.; Berger, Edo; Rest, A.; Milisavljevic, Danny; Lunnan, Ragnhild; Foley, R. J.; Soderberg, Alicia M.; Smartt, S. J.; Burgasser, A. J.; Challis, Peter M.; Chomiuk, L.; Czekala, Ian Philip; Drout, Maria Rebecca; Fong, Wen-fai; Huber, M. E.; Kirshner, Robert P.; Leibler, C.; McLeod, Brian A.; Marion, G. H.; Narayan, Gautham Siddharth; Riess, A. G.; Roth, K. C.; Sanders, Nathan Edward; Scolnic, D.; Smith, K.; Stubbs, Christopher William; Tonry, J. L.; Valenti, S.; Burgett, W. S.; Chambers, K. C.; Hodapp, K. W.; Kaiser, N.; Kudritzki, R.-P.; Magnier, E. A.; Price, P. A. (American Astronomical Society, 2013)
      We present the Pan-STARRS1 discovery of PS1-10afx, a unique hydrogen-deficient superluminous supernova (SLSN) at redshift z = 1.388. The light curve peaked at z P1 = 21.7 mag, making PS1-10afx comparable to the most luminous ...
    • PS1-10afx at z= 1.388: Pan-STARRS1 Discovery of a New Type of Superluminous Supernova 

      Chornock, Ryan T.; Berger, Edo; Rest, A.; Milisavljevic, Danny; Lunnan, Ragnhild; Foley, R. J.; Soderberg, Alicia M.; Smartt, S. J.; Burgasser, A. J.; Challis, Peter M.; Chomiuk, L.; Czekala, Ian Philip; Drout, Maria Rebecca; Fong, Wen-fai; Huber, M. E.; Kirshner, Robert P.; Leibler, C.; McLeod, Brian A.; Marion, G. H.; Narayan, Gautham Siddharth; Riess, A. G.; Roth, K. C.; Sanders, Nathan Edward; Scolnic, D.; Smith, K.; Stubbs, Christopher William; Tonry, J. L.; Valenti, S.; Burgett, W. S.; Chambers, K. C.; Hodapp, K. W.; Kaiser, N.; Kudritzki, R.-P.; Magnier, E. A.; Price, P. A. (American Astronomical Society, 2013)
      We present the Pan-STARRS1 discovery of PS1-10afx, a unique hydrogen-deficient superluminous supernova (SLSN) at redshift z = 1.388. The light curve peaked at z P1 = 21.7 mag, making PS1-10afx comparable to the most luminous ...
    • Ps1-10bzj: A Fast, Hydrogen-Poor Superluminous Supernova in a Metal Poor Host Galaxy 

      Lunnan, R; Chornock, R; Berger, Edo; Milisavljevic, Danny; Drout, Maria Rebecca; Sanders, Nathan Edward; Challis, P. M.; Czekala, I.; Foley, R. J.; Fong, W.; Huber, M. E.; Kirshner, R. P.; Leibler, C.; Marion, G. H.; McCrum, M.; Narayan, G.; Rest, A.; Roth, K. C.; Scolnic, D.; Smartt, S. J.; Smith, K.; Soderberg, Alicia M.; Stubbs, Christopher William; Tonry, J. L.; Burgett, W. S.; Chambers, K. C.; Kudritzki, R.-P.; Magnier, E. A.; Price, P. A. (IOP Publishing, 2013)
      We present observations and analysis of PS1-10bzj, a superluminous supernova (SLSN) discovered in the Pan-STARRS Medium Deep Survey at a redshift z = 0.650. Spectroscopically, PS1-10bzj is similar to the hydrogen-poor SLSNe ...