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- Center for Astrophysics Harvard & SmithsonianUS68 papers
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6 papers · 2 filters
An Optical Study of BG Geminorum: An Ellipsoidal Binary with an Unseen Primar Star
P. J. Benson, A. Dullighan, A. Bonanos +2
We describe optical photometric and spectroscopic observations of the bright variable BG Geminorum. Optical photometry shows a pronounced ellipsoidal variation of the K0 I secondar…
Rotation in the Orion Nebula Cluster
W. Herbst, K. L. Rhode, L. A. Hillenbrand +1
Eighteen fields in the Orion Nebula Cluster (ONC) have been monitored for one or more observing seasons from 1990-99 with a 0.6-m telescope at Wesleyan University. Photometric data…
The Type Ia Supernova 1998bu in M96 and the Hubble Constant
S. Jha, P. Garnavich, R. Kirshner +39
We present optical and near-infrared photometry and spectroscopy of the type Ia SN 1998bu in the Leo I Group galaxy M96 (NGC 3368). The data set consists of 356 photometric measure…
Observations of GRB 990123 by the Compton Gamma-Ray Observatory
M. S. Briggs, D. L. Band, R. M. Kippen +15
GRB 990123 was the first burst from which simultaneous optical, X-ray and gamma-ray emission was detected; its afterglow has been followed by an extensive set of radio, optical and…
The ISO/NASA Key Project on AGN Spectral Energy Distributions (Characteristics of the ISO Data)
Eric J. Hooper, Belinda J. Wilkes, Kim K. McLeod +5
The U.S. ISO Key Project on quasar spectral energy distributions seeks to better understand the very broad-band emission features of quasars from radio to X-rays. A key element of…
The Far-infrared Continuum of Quasars
Belinda J. Wilkes, Eric J. Hooper, Kim K. McLeod +5
ISO provides a key new far-infrared window through which to observe the multi-wavelength spectral energy distributions (SEDs) of quasars and active galactic nuclei (AGN). It allows…