activity
19992022
most citedFrom Shock Breakout to Peak and Beyond: Extensive Panchromatic Observations of the Type Ib Supernova 2008D associated with Swift X-ray Transient 080109

311 citations · 3.3k across the 30 of their papers we have counts for

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Showing astro-ph.HEShow all

8 papers · 1 filter

astro-ph.HE2020★ 14 cited

Improved Constraints on Anisotropic Birefringent Lorentz Invariance and CPT Violation from Broadband Optical Polarimetry of High Redshift Galaxies

Andrew S. Friedman, Roman Gerasimov, Fabian Kislat +4

In the framework of the Standard Model Extension (SME), we present improved constraints on anisotropic Lorentz invariance and Charge-Parity-Time (CPT) violation by searching for as…

astro-ph.HE2019

Standard-Model Extension Constraints on Lorentz and CPT Violation From Optical Polarimetry of Active Galactic Nuclei

Andrew S. Friedman, David Leon, Roman Gerasimov +9

Vacuum birefringence from Lorentz and CPT violation in the Standard-Model Extension can be constrained using ground-based optical polarimetry of extragalactic sources. We describe…

astro-ph.HE2018★ 25 cited

Constraints on Lorentz Invariance and CPT Violation using Optical Photometry and Polarimetry of Active Galaxies BL Lacertae and S5 B0716+714

Andrew S. Friedman, David Leon, Kevin D. Crowley +5

Various quantum gravity approaches that extend beyond the standard model predict Lorentz Invariance and Charge-Parity-Time Violation at energies approaching the Planck scale. These…

astro-ph.HE2017★ 42 cited

Type II Supernova Light Curves and Spectra From the CfA

Malcolm Hicken, Andrew S. Friedman, Stephane Blondin +8

We present multiband photometry of 60 spectroscopically-confirmed supernovae (SN): 39 SN II/IIP, 19 IIn, one IIb and one that was originally classified as a IIn but later as a Ibn.…

astro-ph.HE2014★ 79 cited

CfAIR2: Near Infrared Light Curves of 94 Type Ia Supernovae

Andrew S. Friedman, W. M. Wood-Vasey, G. H. Marion +18

CfAIR2 is a large homogeneously reduced set of near-infrared (NIR) light curves for Type Ia supernovae (SN Ia) obtained with the 1.3m Peters Automated InfraRed Imaging TELescope (P…

astro-ph.HE2013★ 265 cited

High Density Circumstellar Interaction in the Luminous Type IIn SN 2010jl: The first 1100 days

Claes Fransson, Mattias Ergon, Peter J. Challis +16

HST and ground based observations of the Type IIn SN 2010jl are analyzed, including photometry, spectroscopy in the ultraviolet, optical and NIR bands, 26-1128 days after first det…