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APOGEE: The Apache Point Observatory Galactic Evolution Experiment
C. Allende Prieto, S. R. Majewski, R. Schiavon +8
APOGEE is a large-scale, NIR, high-resolution (R~20,000) spectroscopic survey of Galactic stars. It is one of the four experiments in SDSS-III. Because APOGEE will observe in the H…
Physical Conditions of Accreting Gas in T Tauri Star Systems
Jeffrey S. Bary, Sean P. Matt, Michael F. Skrutskie +3
We present results from a low resolution (R~300) near-infrared spectroscopic variability survey of actively accreting T Tauri stars (TTS) in the Taurus-Auriga star forming region.…
Near-Infrared Photometry of the Type IIn SN 2005ip: The Case for Dust Condensation
Ori Fox, Michael F. Skrutskie, Roger A. Chevalier +13
Near-infrared photometric observations of the Type IIn SN 2005ip in NGC 2906 reveal large fluxes (>1.3 mJy) in the K_s-band over more than 900 days. While warm dust can explain the…
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…
New Young Brown Dwarfs in the Orion Molecular Cloud 2/3 Region
Dawn E. Peterson, S. T. Megeath, K. L. Luhman +7
Forty new low mass members with spectral types ranging from M4-M9 have been confirmed in the Orion Molecular Cloud 2/3 region. Through deep, I, z', J, H, K photometry of a 20' x 20…
Observations of the Naked-Eye GRB 080319B: Implications of Nature's Brightest Explosion
J. S. Bloom, D. A. Perley, W. Li +18
The first gamma-ray burst (GRB) confirmed to be bright enough to be seen with the naked eye, GRB 080319B at redshift z = 0.937, allowed for exquisite follow-up observations across…
Near and Mid-IR Photometry of the Pleiades, and a New List of Substellar Candidate Members
John R. Stauffer, Lee W. Hartmann, Giovanni G. Fazio +13
We make use of new near and mid-IR photometry of the Pleiades cluster in order to help identify proposed cluster members. We also use the new photometry with previously published p…
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…
Characterizing Young Brown Dwarfs using Low Resolution Near-IR Spectra
K. N. Allers, D. T. Jaffe, K. L. Luhman +7
We present near-infrared (1.0-2.4 micron) spectra confirming the youth and cool effective temperatures of 6 brown dwarfs and low mass stars with circumstellar disks toward the Cham…
Discovery of a Young Substellar Companion in Chamaeleon
K. L. Luhman, J. C. Wilson, W. Brandner +6
During an imaging survey of the Chamaeleon I star-forming region with the ACS aboard HST, we have discovered a candidate substellar companion to the young low-mass star CHXR 73 (~2…
Unveiling the Boxy Bulge and Bar of the Andromeda Spiral Galaxy
Rachael L. Beaton, Steven R. Majewski, Puragra Guhathakurta +6
A new, 2.8 deg^2 J,H,K_s infrared survey from the 2MASS 6x program across the extent of the optical disk of the Andromeda (M31) galaxy provides a clear view of the M31 center almos…
A 2MASS All-Sky View of the Sagittarius Dwarf Galaxy: Variation of the Metallicity Distribution Function Along the Sagittarius Stream
Mei-Yin Chou, Steven R. Majewski, Katia Cunha +9
We present reliable measurements of the metallicity distribution function (MDF) at different points along the tidal stream of the Sagittarius (Sgr) dwarf spheroidal (dSph) galaxy,…
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…
Optical Lightcurve & Cooling Break of GRB 050502A
S. A. Yost, K. Alatalo, E. S. Rykoff +29
We present lightcurves of the afterglow of GRB050502A, including very early data at t-t_{GRB} < 60s. The lightcurve is composed of unfiltered ROTSE-IIIb optical observations from 4…
The Dog on the Ship: The "Canis Major Dwarf Galaxy" as an Outlying Part of the Argo Star System
Helio J. Rocha-Pinto, Steven R. Majewski, Michael F. Skrutskie +4
Overdensities in the distribution of low latitude, 2MASS giant stars are revealed by systematically peeling away from sky maps the bulk of the giant stars conforming to ``isotropic…
A contemporaneous infrared flash from a long gamma-ray burst: an echo from the central engine
C. H. Blake, J. S. Bloom, D. L. Starr +25
The explosion that results in a cosmic gamma-ray burst (GRB) is thought to produce emission from two physical processes -- the activity of the central engine gives rise to the high…
The Fan Observatory Bench Optical Spectrograph (FOBOS)
Jeffrey D. Crane, Steven R. Majewski, Richard J. Patterson +3
The Fan Observatory Bench Optical Spectrograph (FOBOS) is intended for single-object optical spectroscopy at moderate resolution (R~1500-3000) using a fiber-fed, bench-mounted desi…
Exploring Halo Substructure with Giant Stars: A diffuse star cloud or tidal debris around the Milky Way in Triangulum-Andromeda
Helio J. Rocha-Pinto, Steven R. Majewski, M. F. Skrutskie +2
We report here the discovery of an apparent excess of 2MASS M giant candidates with dereddened 0.85 < J-K_S < 1.2 spanning a considerably large area of the celestial sphere between…
A Two Micron All-Sky Survey View of the Sagittarius Dwarf Galaxy: II. Swope Telescope Spectroscopy of M Giant Stars in the Dynamically Cold Sagittarius Tidal Stream
Steven R. Majewski, William E. Kunkel, David R. Law +10
We present moderate resolution (~6 km/s) spectroscopy of 284 M giant candidates selected from the Two Micron All Sky Survey photometry. Radial velocities (RVs) are presented for st…
Dark Matter Constraints from the Sagittarius Dwarf and Tail System
Steven R. Majewski, David R. Law, Kathryn V. Johnston +2
2MASS has provided a three-dimensional map of the >360 degree, wrapped tidal tails of the Sagittarius (Sgr) dwarf spheroidal galaxy, as traced by M giant stars. With the inclusion…
Exploring Halo Substructure with Giant Stars: Spectroscopy of Stars in the Galactic Anticenter Stellar Structure
Jeffrey D. Crane, Steven R. Majewski, Helio J. Rocha-Pinto +3
To determine the nature of the recently discovered, ring-like stellar structure at the Galactic anticenter, we have collected spectra of a set of presumed constituent M giants sele…
Astrometry with Hubble Space Telescope: A Parallax of the Central Star of the Planetary Nebula NGC 6853
G. Fritz Benedict, B. E. McArthur, L. W. Fredrick +17
We present an absolute parallax and relative proper motion for the central star of the planetary nebula NGC 6853 (The Dumbell). We obtain these with astrometric data from FGS 3, a…
The Galactic Anticenter Stellar Stream
Helio J. Rocha-Pinto, Steven R. Majewski, M. F. Skrutskie +1
The recently discovered, ring-like structure just outside the Galactic disk in Monoceros is detected and traced among 2MASS M giant stars. We have developed a method to recover the…
2MASS Studies of Differential Reddening Across Three Massive Globular Clusters
David R. Law, Steven R. Majewski, Michael F. Skrutskie +2
J, H, and K_S band data from the Two Micron All-Sky Survey (2MASS) are used to study the effects of differential reddening across the three massive Galactic globular clusters Omega…