C H Blake

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  • N Tominaga, M Tanaka, K Nomoto, P A Mazzali, J Deng, K Maeda +11 others
  • 2005
Observations and modeling for the light curve (LC) and spectra of supernova (SN) 2005bf are reported. This SN showed unique features: the LC had two maxima, and declined rapidly after the second maximum, while the spectra showed strengthening He lines whose velocity increased with time. The double-peaked LC can be reproduced by a double-peaked 56 Ni(More)
We present high angular resolution observations with the Keck Interferometer, high dispersion spectroscopic observations with Keck/NIRSPEC, and near-IR photometric observations from PAIRITEL of a sample of 11 solar-type T Tauri stars in 9 systems. We use these observations to probe the circumstellar material within 1 AU of these young stars, measuring the(More)
The scholarly literature on health care politics has generated a series of hypotheses to explain U.S. exceptionalism in health policy and to explain the adoption of national health insurance (NHI) more generally. Various cultural, institutional, and political conditions are held to make the establishment of some form of national health insurance policy more(More)
The explosion that results in a cosmic gamma-ray burst (GRB) is thought to produce emission from two physical processes: the central engine gives rise to the high-energy emission of the burst through internal shocking, and the subsequent interaction of the flow with the external environment produces long-wavelength afterglows. Although observations of(More)
The first gamma-ray burst (GRB) confirmed to be bright enough to be seen with the naked eye, GRB 080319B at redshift z = 0.937, allowed for exquisite follow-up observations across the electromagnetic spectrum. We present our detailed optical and infrared observations of the afterglow, consisting of over 5000 images starting 51 s after the GRB trigger, in(More)
The BL Lacertae object 3C 66A was detected in a flaring state by the Fermi Large Area Telescope (LAT) and VERITAS in 2008 October. In addition to these gamma-ray observations, F-GAMMA, GASP-WEBT, PAIRITEL, MDM, ATOM, Swift, and Chandra provided radio to X-ray coverage. The available light curves show variability and, in particular, correlated flares are(More)
  • M Modjaz, W Li, N Butler, R Chornock, D Perley, S Blondin +35 others
  • 2009
We present extensive early photometric (ultraviolet through near-infrared) and spectroscopic (optical and near-infrared) data on supernova (SN) 2008D as well as X-ray data analysis on the associated Swift X-ray transient (XRT) 080109. Our data span a time range of 5 hr before the detection of the X-ray transient to 150 days after its detection, and a(More)
  • M Modjaz, W Li, N Butler, R Chornock, D Perley, S Blondin +36 others
  • 2008
We present extensive early photometric (U BV Rr ′ Ii ′ JHK s) and spectroscopic (optical and near-infrared) data on supernova (SN) 2008D as well as X-ray data on the associated X-ray transient (XRT) 080109 which was serendipitously discovered in Swift data during follow-up observations of SN Ib 2007uy in the same galaxy, NGC 2770. Our data span a time range(More)
We present optical and infrared monitoring of the 2005 outburst of the halo black hole X-ray transient XTE J1118+480. We measured a total outburst amplitude of ∼ 5.7±0.1 mag in the R band and ∼ 5 mag in the infrared J, H and K s bands. The hardness ratio HR2 (5-12 keV/3-5 keV) from the RXTE/ASM data is 1.53±0.02 at the peak of the outburst indicating a hard(More)
We present light curves of the afterglow of GRB 050502A, including very early data at t À t GRB < 60 s. The light curve is composed of unfiltered ROTSE-IIIb optical observations from 44 s to 6 hr postburst, R-band MDM observations from 1.6 to 8.4 hr postburst, and PAIRITEL JHK s observations from 0.6 to 2.6 hr postburst. The optical light curve is fit by a(More)