Browsing by Author "Chornock, R"

Now showing items 21-37 of 37

    • An R-Process Kilonova Associated With the Short-Hard Grb 130603b 

      Berger, Edo; Fong, W; Chornock, R (IOP Publishing, 2013)
      We present ground-based optical and Hubble Space Telescope optical and near-IR observations of the shorthard GRB 130603B at z = 0.356, which demonstrate the presence of excess near-IR emission matching the expected brightness ...

    • Rapidly evolving and luminous transients from Pan-STARRS1 

      Drout, Maria Rebecca; Chornock, R; Soderberg, Alicia M.; Sanders, Nathan Edward; McKinnon, R.; Rest, Armin Wolfgang; Foley, R. J.; Milisavljevic, Danny; Margutti, R; Berger, Edo; Calkins, Michael Lee; Fong, W; Gezari, S.; Huber, M. E.; Kankare, E.; Kirshner, Robert P.; Leibler, C.; Lunnan, R; Mattila, S.; Marion, G. H.; Narayan, Gautham Siddharth; Riess, A. G.; Roth, K. C.; Scolnic, D.; Smartt, S. J.; Tonry, J. L.; Burgett, W. S.; Chambers, K. C.; Hodapp, K. W.; Jedicke, R.; Kaiser, N.; Magnier, E. A.; Metcalfe, N.; Morgan, J. S.; Price, P. A.; Waters, C. (IOP Publishing, 2014)
      In the past decade, several rapidly evolving transients have been discovered whose timescales and luminosities are not easily explained by traditional supernovae (SNe) models. The sample size of these objects has remained ...

    • A Reverse Shock in GRB 130427A 

      Laskar, T.; Berger, Edo; Zauderer, B. A.; Margutti, R.; Soderberg, Alicia M.; Chakraborti, S.; Lunnan, R; Chornock, R; Chandra, P.; Ray, A. (IOP Publishing, 2013)
      We present extensive radio and millimeter observations of the unusually bright GRB 130427A at z = 0.340, spanning 0.67 to 12 d after the burst. Taken in conjunction with detailed multi-band UV, optical, NIR, and X-ray ...

    • A Search for Fast Optical Transients in the Pan-STARRS1 Medium-Deep Survey: M-Dwarf Flares, Asteroids, Limits on Extragalactic Rates, and Implications for LSST 

      Berger, Edo; Leibler, C. N.; Chornock, Ryan T.; Rest, A.; Foley, R. J.; Soderberg, Alicia M.; Price, P. A.; Burgett, W. S.; Chambers, K. C.; Flewelling, H.; Huber, M. E.; Magnier, E. A.; Metcalfe, N.; Stubbs, Christopher William; Tonry, J. L. (American Astronomical Society, 2013)
      We present a search for fast optical transients (τ ~ 0.5 hr-1 day) using repeated observations of the Pan-STARRS1 Medium-Deep Survey (PS1/MDS) fields. Our search takes advantage of the consecutive g P1 r P1 observations ...

    • Selection of Burst-Like Transients and Stochastic Variables Using Multi-Band Image Differencing in the Pan-Starrs1 Medium-Deep Survey 

      Kumar, S.; Gezari, S.; Heinis, S.; Chornock, R; Berger, Edo; Rest, A.; Huber, M. E.; Foley, R. J.; Narayan, G.; Marion, G. H.; Scolnic, D.; Soderberg, Alicia M.; Lawrence, A.; Stubbs, Christopher William; Kirshner, Robert P.; Riess, A. G.; Smartt, S. J.; Smith, K.; Wood-Vasey, W. M.; Burgett, W. S.; Chambers, K. C.; Flewelling, H.; Kaiser, N.; Metcalfe, N.; Price, P. A.; Tonry, J. L.; Wainscoat, R. J. (IOP Publishing, 2015)
      We present a novel method for the light-curve characterization of Pan-STARRS1 Medium Deep Survey (PS1 MDS) extragalactic sources into stochastic variables (SVs) and burst-like (BL) transients, using multi-band image-differencing ...

    • Slowly Fading Super-Luminous Supernovae That Are Not Pair-Instability Explosions 

      Nicholl, M.; Smartt, S. J.; Jerkstrand, A.; Inserra, C.; McCrum, M.; Kotak, R.; Fraser, M.; Wright, D.; Chen, T.-W.; Smith, K.; Young, D. R.; Sim, S. A.; Valenti, S.; Howell, D. A.; Bresolin, F.; Kudritzki, R. P.; Tonry, J. L.; Huber, M. E.; Rest, A.; Pastorello, A.; Tomasella, L.; Cappellaro, E.; Benetti, S.; Mattila, S.; Kankare, E.; Kangas, T.; Leloudas, G.; Sollerman, J.; Taddia, F.; Berger, E.; Chornock, Ryan T.; Narayan, Gautham Siddharth; Stubbs, Christopher William; Foley, R. J.; Lunnan, Ragnhild; Soderberg, Alicia M.; Sanders, Nathan Edward; Milisavljevic, Danny; Margutti, Raffaella; Kirshner, Robert P.; Elias-Rosa, N.; Morales-Garoffolo, A.; Taubenberger, S.; Botticella, M. T.; Gezari, S.; Urata, Y.; Rodney, S.; Riess, A. G.; Scolnic, D.; Wood-Vasey, W. M.; Burgett, W. S.; Chambers, K.; Flewelling, H. A.; Magnier, E. A.; Kaiser, N.; Metcalfe, N.; Morgan, J.; Price, P. A.; Sweeney, W.; Waters, C. (Nature Publishing Group, 2013)
      Super-luminous supernovae that radiate more than 10\(^{44}\) ergs per second at their peak luminosity have recently been discovered in faint galaxies at redshifts of 0.1–4. Some evolve slowly, resembling models of ...

    • Sn 2010ay Is a Luminous and Broad-Lined Type Ic Supernova Within a Low-Metallicity Host Galaxy 

      Sanders, Nathan Edward; Soderberg, Alicia M.; Valenti, S.; Foley, R. J.; Chornock, R; Chomiuk, L; Berger, Edo; Smartt, S.; Hurley, K.; Barthelmy, S. D.; Levesque, E. M.; Narayan, G.; Botticella, M. T.; Briggs, M. S.; Connaughton, V.; Terada, Y.; Gehrels, N.; Golenetskii, S.; Mazets, E.; Cline, T.; von Kienlin, A.; Boynton, W.; Chambers, K. C.; Grav, T.; Heasley, J. N.; Hodapp, K. W.; Jedicke, R.; Kaiser, N.; Kirshner, Robert P.; Kudritzki, R.-P.; Luppino, G. A.; Lupton, R. H.; Magnier, E. A.; Monet, D. G.; Morgan, J. S.; Onaka, P. M.; Price, P. A.; Stubbs, Christopher William; Tonry, J. L.; Wainscoat, R. J.; Waterson, M. F. (IOP Publishing, 2012)
      We report on our serendipitous pre-discovery detection and detailed follow-up of the broad-lined Type Ic supernova (SN) 2010ay at z = 0.067 imaged by the Pan-STARRS1 3π survey just ∼ 4 days after explosion. The SN had a ...

    • Sn 2012au: A Golden Link Between Superluminous Supernovae and Their Lower-Luminosity Counterparts 

      Milisavljevic, Danny; Soderberg, Alicia M.; Margutti, Raffaella; Drout, Maria Rebecca; Marion, G. Howie; Sanders, Nathan Edward; Hsiao, Eric Y.; Lunnan, Ragnhild; Chornock, Ryan; Fesen, Robert A.; Parrent, Jerod T.; Levesque, Emily M.; Berger, Edo; Foley, Ryan J.; Challis, Pete; Kirshner, Robert P.; Dittmann, Jason Adam; Bieryla, Allyson; Kamble, Atish; Chakraborti, Sayan; De Rosa, Gisella; Fausnaugh, Michael; Hainline, Kevin N.; Chen, Chien-Ting; Hickox, Ryan C.; Morrell, Nidia; Phillips, Mark M.; Stritzinger, Maximilian (IOP Publishing, 2013)
      We present optical and near-infrared observations of SN 2012au, a slow-evolving supernova (SN) with properties that suggest a link between subsets of energetic and H-poor SNe and superluminous SNe. SN 2012au exhibited ...

    • The spectroscopic classification and explosion properties of SN2009NZ associated with GRB091127 at z = 0.490 

      Berger, Edo; Chornock, R; Holmes, T. R.; Foley, R. J.; Cucchiara, A.; Wolf, C.; Podsiadlowski, Ph.; Fox, D. B.; Roth, K. C. (IOP Publishing, 2011)
      We present spectroscopic observations of GRB 091127 (z = 0.490) at the peak of the putative associated supernova SN 2009nz. Subtracting a late-time spectrum of the host galaxy, we isolate the contribution of SN 2009nz and ...

    • A Spectroscopic Study of Type Ibc Supernova Host Galaxies From Untargeted Surveys 

      Sanders, Nathan Edward; Soderberg, Alicia M.; Levesque, E. M.; Foley, R. J.; Chornock, R; Milisavljevic, Danny; Margutti, R; Berger, Edo; Drout, Maria Rebecca; Czekala, Ian Philip; Dittmann, Jason Adam (IOP Publishing, 2012)
      We present the first spectroscopic study of the host environments of Type Ibc supernovae (SN Ibc) discovered exclusively by untargeted SN searches. Past studies of SN Ibc host environments have been biased towards high-mass, ...

    • Steps toward Determination of the Size and Structure of the Broad‐Line Region in Active Galactic Nuclei. XVI. A 13 Year Study of Spectral Variability in NGC 5548 

      Peterson, B. M.; Berlind, Perry; Bertram, R.; Bischoff, K.; Bochkarev, N. G.; Borisov, N.; Burenkov, A. N.; Calkins, Michael Lee; Carrasco, L.; Chavushyan, V. H.; Chornock, R; Dietrich, M.; Doroshenko, V. T.; Ezhkova, O. V.; Filippenko, A. V.; Gilbert, A. M.; Huchra, J. P.; Kollatschny, W.; Leonard, D. C.; Li, W.; Lyuty, V. M.; Malkov, Yu. F.; Matheson, T.; Merkulova, N. I.; Mikhailov, V. P.; Modjaz, M.; Onken, C. A.; Pogge, R. W.; Pronik, V. I.; Qian, B.; Romano, P.; Sergeev, S. G.; Sergeeva, E. A.; Shapovalova, A. I.; Spiridonova, O. I.; Tao, J.; Tokarz, S.; Valdes, J. R.; Vlasiuk, V. V.; Wagner, R. M.; Wilkes, Belinda Jane (IOP Publishing, 2002)
      We present the final installment of an intensive 13 year study of variations of the optical continuum and broad Hβ emission line in the Seyfert 1 galaxy NGC 5548. The database consists of 1530 optical continuum measurements ...

    • Toward Characterization of the Type IIP Supernova Progenitor Population: A Statistical Sample of Light Curves from Pan-STARRS1 

      Sanders, Nathan Edward; Soderberg, Alicia M.; Gezari, S.; Betancourt, M.; Chornock, R; Berger, Edo; Foley, R. J.; Challis, Peter M.; Drout, Maria Rebecca; Kirshner, Robert P.; Lunnan, R; Marion, G. H.; Margutti, R; McKinnon, R.; Milisavljevic, Danny; Narayan, G.; Rest, A.; Kankare, E.; Mattila, S.; Smartt, S. J.; Huber, M. E.; Burgett, W. S.; Draper, P.W.; Hodapp, K. W.; Kaiser, N.; Kudritzki, R. P.; Magnier, E. A.; Metcalfe, N.; Morgan, J. S.; Price, P. A.; Tonry, J. L.; Wainscoat, R. J.; Waters, C. (IOP Publishing, 2015)
      In recent years, wide-field sky surveys providing deep multiband imaging have presented a new path for indirectly characterizing the progenitor populations of core-collapse supernovae (SNe): systematic light-curve studies. ...

    • Ultra-Luminous Supernovae as a New Probe of the Interstellar Medium in Distant Galaxies 

      Berger, Edo; Chornock, R; Lunnan, R.; Foley, R.; Czekala, Ian Philip; Rest, A.; Leibler, C.; Soderberg, Alicia M.; Roth, K.; Narayan, G.; Huber, M. E.; Milisavljevic, Danny; Sanders, Nathan Edward; Drout, M.; Margutti, R.; Kirshner, Robert P.; Marion, G. H.; Challis, P. J.; Riess, A. G.; Smartt, S. J.; Burgett, W. S.; Hodapp, K. W.; Heasley, J. N.; Kaiser, N.; Kudritzki, R.-P.; Magnier, E. A.; McCrum, M.; Price, P. A.; Smith, K.; Tonry, J. L.; Wainscoat, R. J. (IOP Publishing, 2012)
      We present the Pan-STARRS1 discovery and light curves, and follow-up MMT and Gemini spectroscopy of an ultra-luminous supernova (ULSN; dubbed PS1-11bam) at a redshift of z = 1.566 with a peak brightness of MUV ≈ −22.3 mag. ...

    • An Ultraviolet–Optical Flare from the Tidal Disruption of a Helium-Rich Stellar Core 

      Gezari, S.; Chornock, Ryan T.; Rest, A.; Huber, M. E.; Forster, K.; Berger, Edo; Challis, Peter J.; Neill, J. D.; Martin, D. C.; Heckman, T.; Lawrence, A.; Norman, C.; Narayan, Gautham Siddharth; Foley, R. J.; Marion, G. H.; Scolnic, D.; Chomiuk, Laura B; Soderberg, Alicia M.; Smith, K.; Kirshner, Robert P.; Riess, A. G.; Smartt, S. J.; Stubbs, Christopher William; Tonry, J. L.; Wood-Vasey, W. M.; Burgett, W. S.; Chambers, K. C.; Grav, T.; Heasley, J. N.; Kaiser, N.; Kudritzki, R.-P.; Magnier, E. A.; Morgan, J. S.; Price, P. A. (Nature Publishing Group, 2012)
      The flare of radiation from the tidal disruption and accretion of a star can be used as a marker for supermassive black holes that otherwise lie dormant and undetected in the centres of distant galaxies1. Previous candidate ...

    • The Unusually Luminous Extragalactic Nova Sn 2010u 

      Czekala, Ian Philip; Berger, Edo; Chornock, R; Pastorello, A.; Marion, G. H.; Margutti, R.; Botticella, M. T.; Challis, P.; Ergon, M.; Smartt, S.; Sollerman, J.; Vinkó, J.; Wheeler, J. C. (IOP Publishing, 2013)
      We present observations of the unusual optical transient SN 2010U, including spectra taken 1.03 days to 15.3 days after maximum light that identify it as a fast and luminous Fe II type nova. Our multi-band light curve ...

    • X-Rays from the Location of the Double-humped Transient ASASSN-15lh 

      Margutti, R; Metzger, B. D.; Chornock, R; Milisavljevic, Danny; Berger, Edo; Blanchard, Peter Kelly; Guidorzi, C.; Migliori, G.; Kamble, Atish; Lunnan, R; Nicholl, Matthew R.; Coppejans, D. L.; Dall’Osso, S.; Drout, M. R.; Perna, R.; Sbarufatti, B. (American Astronomical Society, 2017)
      We present the detection of persistent soft X-ray radiation with ${L}_{x}\sim {10}^{41}$–1042 erg s–1 at the location of the extremely luminous, double-humped transient ASASSN-15lh as revealed by Chandra and Swift. We ...

    • Zooming in on the progenitors of superluminous supernovae with the HST 

      Lunnan, R; Chornock, R; Berger, Edo; Rest, A.; Fong, W; Scolnic, D.; Jones, D. O.; Soderberg, Alicia M.; Challis, Peter M.; Drout, Maria Rebecca; Foley, R. J.; Huber, M. E.; Kirshner, Robert P.; Leibler, C.; Marion, G. H.; McCrum, M.; Milisavljevic, Danny; Narayan, Gautham Siddharth; Sanders, Nathan Edward; Smartt, S. J.; Smith, K. W.; Tonry, J. L.; Burgett, W. S.; Chambers, K. C.; Flewelling, H.; Kudritzki, R.-P.; Wainscoat, R. J.; Waters, C. (IOP Publishing, 2015)
      We present Hubble Space Telescope (HST) rest-frame ultraviolet imaging of the host galaxies of 16 hydrogen-poor superluminous supernovae (SLSNe), including 11 events from the Pan-STARRS Medium Deep Survey. Taking advantage ...