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A Direct Stellar Metallicity Determination in the Disk of the Maser Galaxy NGC4258
Rolf-Peter Kudritzki, Miguel A. Urbaneja, J. Zachary Gazak +4
We present the first direct determination of a stellar metallicity in the spiral galaxy NGC4258 (D=7.6 Mpc) based on the quantitative analysis of a low-resolution (~5 AE) Keck LRIS…
The Araucaria Project. The distance to the Small Magellanic Cloud from late-type eclipsing binaries
Dariusz Graczyk, Grzegorz Pietrzynski, Ian B. Thompson +12
We present a distance determination to the Small Magellanic Cloud (SMC) based on an analysis of four detached, long period, late type eclipsing binaries discovered by the OGLE Surv…
Detection of an outburst one year prior to the explosion of SN 2011ht
M. Fraser, M. Magee, R. Kotak +18
Using imaging from the Pan-STARRS1 survey, we identify a precursor outburst at epochs 287 and 170 days prior to the reported explosion of the purported Type IIn supernova (SN) 2011…
The Extremely Red, Young L Dwarf PSO J318-22: A Free-Floating Planetary-Mass Analog to Directly Imaged Young Gas-Giant Planets
Michael C. Liu, Eugene A. Magnier, Niall R. Deacon +16
We have used Pan-STARRS1 to discover an extremely red late-L dwarf, which has (J-K)_MKO = 2.84 and (J-K)_2MASS = 2.78, making it the reddest known field dwarf and second only to 2M…
The Pan-STARRS1 Small Area Survey 2
N. Metcalfe, D. J. Farrow, S. Cole +15
The Pan-STARRS1 survey is acquiring multi-epoch imaging in 5 bands (grizy) over the entire sky north of declination -30deg (the survey). In July 2011 a test area of about 70 s…
Pan-STARRS1: Galaxy Clustering in the Small Area Survey 2
Daniel J. Farrow, Shaun Cole, N. Metcalfe +11
The Pan-STARRS1 survey is currently obtaining imaging in 5 bands (grizy) for the steradian survey, one of the largest optical surveys ever conducted. The finished survey will…