234 citations · 1.2k across the 39 of their papers we have counts for
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Infrared Spectroscopy of the Ultra Low Mass Binary Oph 162225-240515
Alexis Brandeker, Ray Jayawardhana, Valentin D. Ivanov +1
Binary properties are an important diagnostic of the star and brown dwarf formation processes. While wide binaries appear to be rare in the sub-stellar regime, recent observations…
The Afterglows, Redshifts, and Properties of Swift Gamma-Ray Bursts
E. Berger, S. R. Kulkarni, D. B. Fox +29
We present optical, near-IR, and radio follow up of sixteen Swift bursts, including our discovery of nine afterglows and a redshift determination for three. These observations, sup…
The Magnetic Properties of an L Dwarf Derived from Simultaneous Radio, X-ray, and H-alpha Observations
E. Berger, R. E. Rutledge, I. N. Reid +12
We present the first simultaneous, multi-wavelength observations of an L dwarf, the L3.5 candidate brown dwarf 2MASS J00361617+1821104, conducted with the Very Large Array, the Cha…
The sub-energetic GRB 031203 as a cosmic analogue to GRB 980425
A. M. Soderberg, S. R. Kulkarni, E. Berger +13
Over the six years since the discovery of the gamma-ray burst GRB 980425, associated with the nearby (distance, ~40 Mpc) supernova 1998bw, astronomers have fiercely debated the nat…
Spectroscopy of Very Low Mass Stars and Brown Dwarfs in IC2391: Lithium depletion and Halpha emission
David Barrado y Navascues, John R. Stauffer, Ray Jayawardhana
We have obtained intermediate-resolution optical spectroscopy of 44 candidate very low mass members of the nearby young open cluster IC2391. Of these, 26 spectra are totally new, 1…
The weak-line T Tauri star V410Tau I. A multi-wavelength study of variability
B. Stelzer, M. Fernandez, V. M. Costa +10
We present the results of an intensive coordinated monitoring campaign in the optical and X-ray wavelength ranges of the low-mass, pre-main sequence star V410Tau carried out with t…
Direct Detection of the Companion of Chi 1 Orionis
B. Koenig, K. Fuhrmann, R. Neuhaeuser +2
We present an H-band image of the companion of Chi 1 Orionis taken with the Keck adaptive optic system and NIRC2 camera equipped with a 300mas-diameter coronographic mask. The dire…
Coordinated Multiwavelength Observations of V410Tau
B. Stelzer, M. Fernandez, V. Costa +9
In November 2001 we undertook a coordinated observing campaign to study the connection between X-ray and optical variability in the weak-line T Tauri star V410Tau. The observing pl…
Deep 10 and 18 micron Imaging of the HR 4796A Circumstellar Disk: Transient Dust Particles & Tentative Evidence for a Brightness Asymmetry
C. M. Telesco, R. S. Fisher, R. K. Pina +9
We present new 10.8 and 18.2 micron images of HR 4796A, a young A0V star that was recently discovered to have a spectacular, nearly edge-on, circumstellar disk prominent at ~20 mic…