Browsing by Author "Narayan, Gautham"

Now showing items 1-10 of 10

    • 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 ...

    • Light Curves of Type Ia Supernovae and Preliminary Cosmological Constraints from the ESSENCE Survey 

      Narayan, Gautham Siddharth (2013-09-30)
      The ESSENCE survey discovered 213 type Ia supernovae at redshifts 0.10 < z < 0.81 between 2002 and 2008. We present their R and I band light curve measurements, obtained using the MOSAIC II imager at the CTIO 4 m, along ...

    • 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 ...

    • Precise Throughput Determination of the PanSTARRS Telescope and the Gigapixel Imager using a Calibrated Silicon Photodiode and a Tunable Laser: Initial Results 

      Stubbs, Christopher William; Doherty, Peter Edward; Cramer, Claire; Narayan, Gautham Siddharth; Brown, Yorke; Lykke, Keith; Woodward, John; Tonry, John (Institute of Physics, 2010)
      We have used a precision calibrated photodiode as the fundamental metrology reference in order to determine the relative throughput of the PanSTARRS telescope and the Gigapixel imager, from 400 nm to 1050 nm. Our technique ...

    • 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 ...

    • 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 ...

    • 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 ...

    • The Ultraviolet-Bright, Slowly Declining Transient PS1-11af as a Partial Tidal Disruption Event. 

      Chornock, R.; Berger, Edo; Gezari, S.; Zauderer, Bevin Ashley; Rest, A.; Chomiuk, L.; Kamble, Atish; Soderberg, Alicia M.; Czekala, Ian Philip; Dittmann, Jason Adam; Drout, Maria Rebecca; Foley, R. J.; Fong, W; Huber, M. E.; Kirshner, Robert P.; Lawrence, A.; Lunnan, Ragnhild; Marion, G. H.; Narayan, Gautham Siddharth; Riess, A. G.; Roth, K. C.; Sanders, Nathan Edward; Scolnic, D.; Smartt, S. J.; Smith, K.; Stubbs, Christopher William; Tonry, J. L.; Burgett, W. S.; Chambers, K. C.; Flewelling, H.; Hodapp, K. W.; Kaiser, N.; Magnier, E. A.; Martin, D. C.; Neill, J. D.; Price, P. A.; Wainscoat, R. (IOP Publishing, 2013)
      We present the Pan-STARRS1 discovery of the long-lived and blue transient PS1-11af, which was also detected by Galaxy Evolution Explorer with coordinated observations in the near-ultraviolet (NUV) band. PS1-11af is associated ...

    • 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 ...

    • 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 ...