293 citations · 1.5k across the 23 of their papers we have counts for
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Direct Detection of the Brown Dwarf GJ 802B with Adaptive Optics Masking Interferometry
James P. Lloyd, Frantz Martinache, Michael J. Ireland +4
We have used the Palomar 200" Adaptive Optics (AO) system to directly detect the astrometric brown dwarf GJ 802B reported by Pravdo et al. 2005. This observation is achieved with a…
Masses of Astrometrically-Discovered and Imaged Binaries: G 78-28AB and GJ 231.1BC
Steven H. Pravdo, Stuart B. Shaklan, Sloane J. Wiktorowicz +5
The Stellar Planet Survey (STEPS) is an ongoing astrometric search for giant planets and brown dwarfs around a sample of ~30 M-dwarfs. We have discovered several low-mass companion…
Astrometric Discovery of GJ 802b: In the Brown Dwarf Oasis?
Steven H. Pravdo, Stuart B. Shaklan, James Lloyd
The Stellar Planet Survey is an ongoing astrometric search for giant planets and brown dwarfs around a sample of about 30 M-dwarfs. We have discovered several low-mass companions b…
X-rays from Cepheus A East and West
Steven H. Pravdo, Yohko Tsuboi
We report the discovery of X-rays from both components of Cepheus A, East and West, with the XMM-Newton Observatory. HH 168 joins the ranks of other energetic Herbig Haro objects t…
Discovering M-Dwarf Companions with STEPS
S. H. Pravdo, S. B. Shaklan, J. Lloyd +1
The Stellar Planet Survey (STEPS) is an ongoing astrometric search for giant planets and brown dwarfs around a sample of ~30 M-dwarfs. We have discovered several low-mass companion…
Astrometric Discovery of GJ 164B
Steven H. Pravdo, Stuart B. Shaklan, Todd Henry +1
We discovered a low-mass companion to the M-dwarf GJ 164 with the CCD-based imaging system of the Stellar Planet Survey (STEPS) astrometric program. The existence of GJ 164B was co…
Chandra X-ray observations of Young Clusters II. Orion Flanking Fields Data
Solange V. Ramirez, Luisa Rebull, John Stauffer +7
We present results of Chandra observations of two flanking fields (FF) in Orion, outside the Orion Nebula Cluster (ONC). The observations were taken with the ACIS-I camera with an…
X-rays from HH 80, HH 81, and the Central Region
Steven H. Pravdo, Yohko Tsuboi, Yoshitomo Maeda
We report detections of X-rays from HH 80 and HH 81 with the ACIS instrument on the Chandra X-ray Observatory. These are among the most luminous HH sources in the optical and they…
Chandra X-ray observations of Young Clusters I. NGC2264 Data
Solange V. Ramirez, Luisa Rebull, John Stauffer +7
We present results of a Chandra observation of a field in NGC 2264. The observations were taken with the ACIS-I camera with an exposure time of 48.1 ks. We present a catalog of 263…
Coronal X-ray emission from an intermediate-age brown dwarf
Yohko Tsuboi, Yoshitomo Maeda, Eric D. Feigelson +4
We report the X-ray detection of the brown dwarf (BD) companion TWA 5B in a Myr old pre-main sequence binary system. We clearly resolve the faint companion (35 photons)…
Discovery of a New Nearby Star
B. J. Teegarden, S. H. Pravdo, M. Hicks +6
We report the discovery of a nearby star with a very large proper motion of 5.06 +/- 0.03 arcsec/yr. The star is called SO025300.5+165258 and referred to herein as HPMS (high prope…
X-ray emitting young stars in the Orion Nebula
Eric D. Feigelson, Patrick Broos, James A. Gaffney +5
The Orion Nebula Cluster and the molecular cloud in its vicinity have been observed with the ACIS-I detector on board the Chandra X-ray Observatory with 23 hours exposure. We detec…
Magnetic flaring in the pre-main sequence Sun and implications for the early solar system
Eric D. Feigelson, Gordon P. Garmire, Steven H. Pravdo
To address the role of energetic processes in the solar nebula, we provide a detailed characterization of magnetic flaring in stellar analogs of the pre-main sequence Sun based on…
A Chandra Study of Sgr A East: A Supernova Remnant Regulating The Activity Of Our Galactic Center?
Y. Maeda, F. K. Baganoff, E. D. Feigelson +9
We report on the X-ray emission from the shell-like, non-thermal radio source Sgr A East located in the inner few parsecs of the Galaxy based on observations made with the ACIS det…
Discovery of the Bright Trans-Neptunian Object 2000 EB173
Ignacio Ferrin, D. Rabinowitz, B. Schaefer +45
We describe the discovery circumstances and photometric properties of 2000 EB173, now one of the brightest trans-Neptunian objects (TNOs) with opposition magnitude m_R=18.9 and als…
Chandra X-ray Observatory Study of the Orion Nebula Cluster and BN/KL Region
Gordon Garmire, Eric D. Feigelson, Patrick Broos +4
About 1000 X-ray emitting young pre-main sequence (PMS) stars distributed in mass from 0.05 to 50 solar masses are detected in an image of the Orion Nebula obtained with the Advanc…
ASCA and Ginga Observations of GX 1+4
Taro Kotani, Tadayasu Dotani, Fumiaki Nagase +3
The X-ray binary pulsar GX 1+4 was observed with Ginga every year from 1987 to 1991, and with ASCA in 1994. During the Ginga observations, GX 1+4 was in the steady spindown phase,…