Browsing by Author "Stubbs, Christopher"

Now showing items 21-40 of 60

    • The Interplay Between Civilian and Military Nuclear Risk Assessment, and Sobering Lessons from Fukushima and the Space Shuttle 

      Stubbs, Christopher William (Hoover Institution Press, 2013)

    • 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 ...

    • Linking Optical and Infrared Observations with Gravitational Wave Sources Through Variability 

      Stubbs, Christopher William (Institute of Physics, 2008)
      Optical and infrared observations have thus far detected more celestial cataclysms than have been seen in gravity waves (GW). This argues that we should search for gravity wave signatures that correspond to flux variability ...

    • A map of dust reddening to 4.5 Kpc from Pan-STARRS1 

      Schlafly, E. F.; Green, Gregory Maurice; Finkbeiner, Douglas; Jurić, M.; Rix, H.-W.; Martin, N. F.; Burgett, W. S.; Chambers, K; Draper, P. W.; Hodapp, K. W.; Kaiser, N.; Kudritzki, R.-P.; Magnier, E. A.; Metcalfe, N.; Morgan, J. S.; Price, Mary C.; Stubbs, Christopher William; Tonry, J. L.; Wainscoat, R. J.; Waters, Christopher (IOP Publishing, 2014)
      We present a map of the dust reddening to 4.5 kpc derived from Pan-STARRS1 stellar photometry. The map covers almost the entire sky north of declination −30◦ at a resolution of 7′–14′, and is based on the estimated distances ...

    • Mass Calibration and Cosmological Analysis of the SPT-SZ Galaxy Cluster Sample Using Velocity Dispersion σ v and X-Ray Y X Measurements 

      Bocquet, S.; Saro, A.; Mohr, J. J.; Aird, K. A.; Ashby, Matthew L N; Bautz, M.; Bayliss, Matthew; Bazin, G.; Benson, B. A.; Bleem, L. E.; Brodwin, M.; Carlstrom, J. E.; Chang, C. L.; Chiu, I.; Cho, H. M.; Clocchiatti, A.; Crawford, T. M.; Crites, A. T.; Desai, S.; de Haan, T.; Dietrich, J. P.; Dobbs, M. A.; Foley, R. J.; Forman, William R.; Gangkofner, D.; George, E. M.; Gladders, M. D.; Gonzalez, A. H.; Halverson, N. W.; Hennig, C.; Hlavacek-Larrondo, J.; Holder, G. P.; Holzapfel, W. L.; Hrubes, J. D.; Jones, C.; Keisler, R.; Knox, L.; Lee, A. T.; Leitch, E. M.; Liu, J.; Lueker, M.; Luong-Van, D.; Marrone, D. P.; McDonald, M.; McMahon, J. J.; Meyer, S. S.; Mocanu, L.; Murray, S. S.; Padin, S.; Pryke, C.; Reichardt, C. L.; Rest, Armin Wolfgang; Ruel, J.; Ruhl, J. E.; Saliwanchik, B. R.; Sayre, J. T.; Schaffer, K. K.; Shirokoff, E.; Spieler, H. G.; Stalder, Brian A; Stanford, S. A.; Staniszewski, Z.; Stark, Antony A.; Story, K.; Stubbs, Christopher William; Vanderlinde, K.; Vieira, J. D.; Vikhlinin, Alexey A.; Williamson, R.; Zahn, O.; Zenteno, A. (IOP Publishing, 2015)
      We present a velocity-dispersion-based mass calibration of the South Pole Telescope Sunyaev-Zel'dovich effect survey (SPT-SZ) galaxy cluster sample. Using a homogeneously selected sample of 100 cluster candidates from 720 ...

    • Measurement of Galaxy Cluster Integrated Comptonization and Mass Scaling Relations With the South Pole Telescope 

      Saliwanchik, B. R.; Montroy, T. E.; Aird, K. A.; Bayliss, Matthew; Benson, B. A.; Bleem, L. E.; Bocquet, S.; Brodwin, M.; Carlstrom, J. E.; Chang, C. L.; Cho, H. M.; Clocchiatti, A.; Crawford, T. M.; Crites, A. T.; de Haan, T.; Desai, S.; Dobbs, M. A.; Dudley, J. P.; Foley, R. J.; Forman, William R.; George, E. M.; Gladders, M. D.; Gonzalez, A. H.; Halverson, N. W.; Hlavacek-Larrondo, J.; Holder, G. P.; Holzapfel, W. L.; Hrubes, J. D.; Jones, C.; Keisler, R.; Knox, L.; Lee, A. T.; Leitch, E. M.; Liu, J.; Lueker, M.; Luong-Van, D.; Mantz, A.; Marrone, D. P.; McDonald, M.; McMahon, J. J.; Mehl, J.; Meyer, S. S.; Mocanu, L.; Mohr, J. J.; Murray, S; Nurgaliev, D; Padin, S.; Patej, Anna; Pryke, Clement L.; Reichardt, C. L.; Rest, A.; Ruel, J; Ruhl, J. E.; Saro, A.; Sayre, J. T.; Schaffer, K. K.; Shirokoff, E.; Spieler, H. G.; Stalder, Brian A; Stanford, S. A.; Staniszewski, Z.; Stark, Antony A.; Story, K.; Stubbs, Christopher William; Vanderlinde, K.; Vieira, J. D.; Vikhlinin, Alexey A.; Williamson, R.; Zahn, O.; Zenteno, A. (IOP Publishing, 2015)
      We describe a method for measuring the integrated Comptonization (Y SZ) of clusters of galaxies from measurements of the Sunyaev-Zel'dovich (SZ) effect in multiple frequency bands and use this method to characterize a ...

    • A Novel Mechanism for Color Vision: Pupil Shape and Chromatic Aberration Can Provide Spectral Discrimination for Color Blind Organisms. 

      Stubbs, Alexander L; Stubbs, Christopher William (2016-07-20)
      We present a mechanism by which organisms with only a single photoreceptor, that have a monochromatic view of the world, can achieve color discrimination. The combination of an off axis pupil and the principle of chromatic ...

    • Optical confirmation and redshift estimation of the Planck cluster candidates overlapping the Pan-STARRS Survey 

      Liu, J.; Hennig, C.; Desai, S.; Hoyle, B.; Koppenhoefer, J.; Mohr, J. J.; Paech, K.; Burgett, W. S.; Chambers, K. C.; Cole, S.; Draper, P. W.; Kaiser, N.; Metcalfe, N.; Morgan, J. S.; Price, P. A.; Stubbs, Christopher William; Tonry, J. L.; Wainscoat, R. J.; Waters, C. (Oxford University Press (OUP), 2015)
      We report results of a study of Planck Sunyaev–Zel'dovich effect selected galaxy cluster candidates using the Panoramic Survey Telescope & Rapid Response System (Pan-STARRS) imaging data. We first examine 150 Planck-confirmed ...

    • Optical Spectroscopy and Velocity Dispersions of SZ-Selected Galaxy Clusters 

      Ruel, Jonathan (2013-09-30)
      We present the design and the first results of a program of optical spectroscopy of galaxies in clusters detected in South Pole Telescope (SPT) data using the Sunyaev-Zel'dovich (SZ) effect, the spectral distortion of the ...

    • The Pan-STARRS 1 Photometric Reference Ladder, Release 12.0 

      Magnier, E. A.; Schlafly, E.; Finkbeiner, Douglas; Juric, M.; Tonry, J. L.; Burgett, W. S.; Chambers, K. C.; Flewelling, H. A.; Kaiser, N.; Kudritzki, R.-P.; Morgan, J. S.; Price, P. A.; Sweeney, W. E.; Stubbs, Christopher William (IOP Publishing, 2013)
      As of 2012 Jan 21, the Pan-STARRS1 \(3\pi\) Survey has observed the 3/4 of the sky visible from Hawaii with a minimum of 2 and mean of 7.6 observations in 5 filters, \(g_{\rm P1},r_{\rm P1},i_{\rm P1},z_{\rm P1},y_{\rm ...

    • 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 ...

    • Photometric Calibration of the First 1.5 Years of the Pan-STARRS1 Survey 

      Schlafly, E. F.; Finkbeiner, Douglas; Juric, M.; Magnier, E. A.; Burgett, W. S.; Chambers, K; Grav, T.; Hodapp, K. W.; Kaiser, N.; Kudritzki, R.-P.; Martin, N. F.; Morgan, J. S.; Price, P. A.; Rix, H.-W.; Stubbs, Christopher William; Tonry, J. L.; Wainscoat, R. J. (IOP Publishing, 2012)
      We present a precise photometric calibration of the first 1.5 years of science imaging from the Pan-STARRS1 survey (PS1), an ongoing optical survey of the entire sky north of declination –30° in five bands. Building on the ...

    • PISCO: the Parallel Imager for Southern Cosmology Observations 

      Stalder, Brian A; Stark, Antony A.; Amato, Stephen M.; Geary, John Charles; Shectman, Stephen A.; Stubbs, Christopher William; Szentgyorgyi, Andrew H. (Society of Photo-optical Instrumentation Engineers, 2014)
      We present the design and lab performance of the Parallel Imager for Southern Cosmology Observations (PISCO), a photometer for the 6.5 m diameter Magellan telescopes that produces gl, rl, il, and zl band images simulta- ...

    • 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 ...

    • Precision astronomy with imperfect fully depleted CCDs — an introduction and a suggested lexicon 

      Stubbs, Christopher William (IOP Publishing, 2014)
      This paper summarizes the introductory presentation for a workshop (held Nov 18,19 2013 at Brookhaven National Laboratory) that explored the challenges associated with making precision astronomical measurements using deeply ...

    • 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 ...

    • Public Domain Treaty Compliance Verification in the Digital Age 

      Stubbs, Christopher William; Drell, Sidney D. (Institute of Electrical & Electronics Engineers (IEEE), 2013)
      We explore in this article some of the emerging opportunities, and associated challenges, that the digital age offers for public-domain verification of compliance with international treaties. The increase in data volume, ...

    • Real-time earthquake warning for astronomical observatories 

      Coughlin, Michael; Stubbs, Christopher William; Barrientos, Sergio; Claver, Chuck; Harms, Jan; Chris Smith, R.; Warner, Michael (Springer Science + Business Media, 2015)
      Early earthquake warning is a rapidly developing capability that has significant ramifications for many fields, including astronomical observatories. In this work, we describe the susceptibility of astronomical facilities ...

    • The Redshift Evolution of the Mean Temperature, Pressure, and Entropy Profiles in 80 SPT-Selected Galaxy Clusters 

      McDonald, M.; Benson, B. A.; Vikhlinin, Alexey A.; Aird, K. A.; Allen, S. W.; Bautz, Marshall William; Bayliss, Matthew; Bleem, L. E.; Bocquet, S.; Brodwin, M.; Carlstrom, J. E.; Chang, C. L.; Cho, Hyunjii; Clocchiatti, A.; Crawford, T. M.; Crites, A. T.; de Haan, T.; Dobbs, M. A.; Foley, R. J.; Forman, William R.; George, E. M.; Gladders, M. D.; Gonzalez, A. H.; Halverson, N. W.; Hlavacek-Larrondo, J.; Holder, G. P.; Holzapfel, W. L.; Hrubes, J. D.; Jones, Christine M.; Keisler, R.; Knox, L.; Lee, A. T.; Leitch, E. M.; Liu, J.; Lueker, M.; Luong-Van, D.; Mantz, A.; Marrone, D. P.; McMahon, J; Meyer, S. S.; Miller, Eric; Mocanu, L.; Mohr, J. J.; Murray, S. S.; Padin, S.; Pryke, C.; Reichardt, C. L.; Rest, Armin Wolfgang; Ruhl, J. E.; Saliwanchik, B. R.; Saro, A.; Sayre, James Edward; Schaffer, K. K.; Shirokoff, E.; Spieler, H. G.; Stalder, Brian A; Stanford, S. A.; Staniszewski, Z.; Stark, Aaron William; Story, K. T.; Stubbs, Christopher William; Vanderlinde, K.; Vieira, J. D.; Williamson, R.; Zahn, O.; Zenteno, A. (IOP Publishing, 2014)
      We present the results of an X-ray analysis of 80 galaxy clusters selected in the 2500 deg2 South Pole Telescope survey and observed with the Chandra X-ray Observatory. We divide the full sample into subsamples of ∼20 ...