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9 papers · 1 filter
SN 2010ay is a Luminous and Broad-lined Type Ic Supernova within a Low-metallicity Host Galaxy
Nathan E. Sanders, A. M. Soderberg, S. Valenti +38
We report on our serendipitous pre-discovery detection and detailed follow-up of the broad-lined Type Ic supernova (SN) 2010ay at z = 0.067 imaged by the Pan-STARRS1 3pi survey jus…
A New Microlensing Event in the Doubly-Imaged Quasar Q0957+561
Laura J. Hainline, Christopher W. Morgan, J. N. Beach +6
We present evidence for ultraviolet/optical microlensing in the gravitationally lensed quasar Q0957+561. We combine new measurements from our optical monitoring campaign at the Uni…
The Southern Proper Motion Program IV. The SPM4 Catalog
T. M. Girard, W. F. van Altena, N. Zacharias +8
We present the fourth installment of the Yale/San Juan Southern Proper Motion Catalog, SPM4. The SPM4 contains absolute proper motions, celestial coordinates, and (B,V) photometry…
Stellar Astrophysics with a Dispersed Fourier Transform Spectrograph. II. Orbits of Double-lined Spectroscopic Binaries
Bradford B. Behr, Andrew T. Cenko, Arsen R. Hajian +4
We present orbital parameters for six double-lined spectroscopic binaries (iota Pegasi, omega Draconis, 12 Bootis, V1143 Cygni, beta Aurigae, and Mizar A) and two double-lined trip…
The Case for the Dual Halo of the Milky Way
Timothy C. Beers, Daniela Carollo, Zeljko Ivezic +11
Carollo et al. have recently resolved the stellar population of the Milky Way halo into at least two distinct components, an inner halo and an outer halo. This result has been crit…
YSOVAR: the first sensitive, wide-area, mid-IR photometric monitoring of the ONC
M. Morales-Calderón, J. R. Stauffer, L. A. Hillenbrand +33
We present initial results from time series imaging at infrared wavelengths of 0.9 sq. degrees in the Orion Nebula Cluster (ONC). During Fall 2009 we obtained 81 epochs of Spitzer…