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Fundamental Properties of Low-Mass Stars and Brown Dwarfs
Michael C. Liu, Keivan G. Stassun, France Allard +7
Precise measurements of the fundamental properties of low-mass stars and brown dwarfs are key to understanding the physics underlying their formation and evolution. While there has…
T-Lyr1-17236: A Long-Period Low-Mass Eclipsing Binary
Jonathan Devor, David Charbonneau, Guillermo Torres +8
We describe the discovery of a 0.68+0.52 solar mass eclipsing binary (EB) with an 8.4-day orbital period, found through a systematic search of ten fields of the Trans-atlantic Exop…
Near Infrared Monitoring of Ultracool Dwarfs: Prospects for Searching for Transiting Companions
Cullen H. Blake, Joshua S. Bloom, David W. Latham +4
Stars of late-M and L spectral types, collectively known as Ultracool Dwarfs (UCDs), may be excellent targets for searches for extrasolar planets. Owing to their small radii, the s…
The Rapidly Flaring Afterglow of the Very Bright and Energetic GRB 070125
Adria C. Updike, Joshua B. Haislip, Melissa C. Nysewander +52
We report on multi-wavelength observations, ranging from the X-ray to radio wave bands, of the IPN-localized gamma-ray burst GRB 070125. Spectroscopic observations reveal the prese…
From Shock Breakout to Peak and Beyond: Extensive Panchromatic Observations of the Type Ib Supernova 2008D associated with Swift X-ray Transient 080109
Maryam Modjaz, W. Li, N. Butler +38
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…
A Spectroscopic Binary at the M/L Transition
Cullen H. Blake, David Charbonneau, Russel J. White +3
We report the discovery of a single-lined spectroscopic binary with an Ultra Cool Dwarf (UCD) primary with a spectral type between M8 and L0.5. This system was discovered during th…
Type Ia Supernovae are Good Standard Candles in the Near Infrared: Evidence from PAIRITEL
W. Michael Wood-Vasey, Andrew S. Friedman, Joshua S. Bloom +11
We have obtained 1087 NIR (JHKs) measurements of 21 SNe Ia using PAIRITEL, nearly doubling the number of well-sampled NIR SN Ia light curves. These data strengthen the evidence tha…
Near-Infrared Interferometric, Spectroscopic, and Photometric Monitoring of T Tauri Inner Disks
J. A. Eisner, L. A. Hillenbrand, R. J. White +3
We present high angular resolution observations with the Keck Interferometer, high dispersion spectroscopic observations with Keck/NIRSPEC, and near-IR photometric observations fro…
A New Low-Mass Eclipsing Binary from SDSS-II
Cullen H. Blake, Guillermo Torres, Joshua S. Bloom +1
We present observations of a new low-mass double-lined eclipsing binary system discovered using repeat observations of the celestial equator from the Sloan Digital Sky Survey II. U…
Multiepoch Radial Velocity Observations of L Dwarfs
Cullen H. Blake, David Charbonneau, Russel J. White +2
We report on the development of a technique for precise radial-velocity measurements of cool stars and brown dwarfs in the near infrared. Our technique is analogous to the Iodine (…
What Can the Cosmic Microwave Background Tell Us About the Outer Solar System?
Daniel Babich, Cullen H. Blake, Charles Steinhardt
We discuss two new observational techniques that use observations of the Cosmic Microwave Background (CMB) to place constraints upon the mass, distance, and size distribution of sm…
Discovery of a Very Bright, Nearby Gravitational Microlensing Event
B. Scott Gaudi, Joseph Patterson, David S. Spiegel +18
We report the serendipitous detection of a very bright, very nearby microlensing event. In late October 2006, an otherwise unremarkable A0 star at a distance ~1 kpc (GSC 3656-1328)…
Multicolor Infrared Observations of SN 2006aj, the Supernova Associated with XRF 060218 - Paper I
Daniel Kocevski, Maryam Modjaz, Joshua S. Bloom +8
We report simultaneous multicolor near-infrared (NIR) observations of the supernova associated with x-ray Flash 060218 during the first 16 days after the high energy event. We find…
The 2005 outburst of the halo black hole X-ray transient XTE J1118+480
C. Zurita, M. A. P. Torres, D. Steeghs +15
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…
GRB 050408: An Atypical Gamma-Ray Burst as a Probe of an Atypical Galactic Environment
R. J. Foley, D. A. Perley, D. Pooley +14
The bright GRB 050408 was localized by HETE-II near local midnight, enabling an impressive ground-based followup effort as well as space-based followup from Swift. The Swift data f…
Autonomous Observing and Control Systems for PAIRITEL, a 1.3m Infrared Imaging Telescope
J. S. Bloom, Dan L. Starr, Cullen H. Blake +2
The Peters Automated Infrared Imaging Telescope (PAIRITEL) is the first meter-class telescope operating as a fully robotic IR imaging system. Dedicated in October 2004, PAIRITEL be…
Closing in on a Short-Hard Burst Progenitor: Constraints from Early-Time Optical Imaging and Spectroscopy of a Possible Host Galaxy of GRB 050509b
J. S. Bloom, J. X. Prochaska, D. Pooley +25
The localization of the short-duration, hard-spectrum GRB 050509b was a watershed event. Thanks to the nearly immediate relay of the GRB position by Swift, we began imaging the GRB…
Systematic errors in weak lensing: application to SDSS galaxy-galaxy weak lensing
Rachel Mandelbaum, Christopher M. Hirata, Uros Seljak +6
Weak lensing is emerging as a powerful observational tool to constrain cosmological models, but is at present limited by an incomplete understanding of many sources of systematic e…
Science Programs for a 2 m-class Telescope at Dome C, Antarctica: PILOT, the Pathfinder for an International Large Optical Telescope
M. G. Burton, J. Lawrence, M. C. B. Ashley +24
The cold, dry and stable air above the summits of the Antarctic plateau provides the best ground-based observing conditions from optical to sub-mm wavelengths to be found on the Ea…
Automated classification of variable stars for ASAS 1-2 data
L. Eyer, C. Blake
With the advent of surveys generating multi-epoch photometry and the discovery of large numbers of variable stars, the classification of these stars has to be automatic. We have de…
Galaxy-galaxy weak lensing in SDSS: intrinsic alignments and shear calibration errors
Christopher M. Hirata, Rachel Mandelbaum, Uros Seljak +9
Galaxy-galaxy lensing has emerged as a powerful probe of the dark matter halos of galaxies, but is subject to contamination if intrinsically aligned satellites of the lens galaxy a…
Optical Limits on Precursor Emission from Gamma-Ray Bursts with Known Redshift
C. Blake, J. S. Bloom
Making use of virtual observatory data, we present the first comprehensive sample of optical observations conducted before the explosion times of all gamma-ray bursts (GRBs) with k…
A Search for Period Changes in Delta Scuti Stars with the Super-LOTIS Sky Patrol System
C. Blake, D. W. Fox, H. S. Park +1
We have observed a sample of Delta Scuti stars discovered by the ROTSE collaboration in 1999 with Super-LOTIS in order to characterize changes in their pulsation periods over a tim…
The Princeton Variability Survey
Cullen Blake
The Princeton Variability Survey (PVS) is a robotic survey which makes use of readily available, ``off-the-shelf'' type hardware products, in conjunction with a powerful set of com…