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Your search keyword '"GARNAVICH, PETER"' showing total 2 results
2 results on '"GARNAVICH, PETER"'

1. Strongly Variable Absorption Lines Along the Line-of-Sight to a Gamma-Ray Burst.

Author

Garnavich, Peter M., Heng Hao, and Stanek, Krzysztof Z.

Subjects
*AFTERGLOW (Physics), *GAMMA ray bursts, *TELESCOPES, *ASTRONOMICAL observations, *REDSHIFT, *ABSORPTION spectra
Abstract

Quick response to the bright afterglow of GRB 060206 permitted four hours of time-resolved spectroscopy to be obtained with the FLWO 1.5-m Tillinghast telescope. The spectra show the presence of three absorption systems at z = 4.05, 3.54 and 1.48 with the redshift of the burst probably coincident with the damped Lyman-α system at z = 4.05. The time-series of spectra reveal variations in the absorption line strengths of Mg II and Fe II in the system at z = 1.48. This is the first detection of significant variability in a an intervening absorption system and this observation has important implications for the understanding of the distribution of cloud sizes and the difference between QSO and GRB absorption line characteristics. [ABSTRACT FROM AUTHOR]

Published
2007
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2. SWEETSPOT: NEAR-INFRARED OBSERVATIONS OF 13 TYPE Ia SUPERNOVAE FROM A NEW NOAO SURVEY PROBING THE NEARBY SMOOTH HUBBLE FLOW.

Author

Weyant, Anja, Wood-Vasey, W. Michael, Allen, Lori, Garnavich, Peter M., Jha, Saurabh W., Joyce, Richard, and Matheson, Thomas

Subjects
NEAR infrared radiation, SUPERNOVAE spectra, HUBBLE constant, TELESCOPES, REDSHIFT
Abstract

We present 13 Type Ia supernovae (SNe Ia) observed in the rest-frame near-infrared (NIR) from 0.02 < z < 0.09 with the WIYN High-resolution Infrared Camera on the WIYN 3.5 m telescope. With only one to three points per light curve and a prior on the time of maximum from the spectrum used to type the object, we measure an H-band dispersion of spectroscopically normal SNe Ia of 0.164 mag. These observations continue to demonstrate the improved standard brightness of SNe Ia in an H band, even with limited data. Our sample includes two SNe Ia at z ∼ 0.09, which represent the most distant rest-frame NIR H-band observations published to date. This modest sample of 13 NIR SNe Ia represent the pilot sample for “SweetSpot”—a 3 yr NOAO Survey program that will observe 144 SNe Ia in the smooth Hubble flow. By the end of the survey we will have measured the relative distance to a redshift of z ∼ 0.05%-1%. Nearby Type Ia supernova (SN Ia) observations such as these will test the standard nature of SNe Ia in the rest-frame NIR, allow insight into the nature of dust, and provide a critical anchor for future cosmological SN Ia surveys at higher redshift. [ABSTRACT FROM AUTHOR]

Published
2014
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