Bibcode
Nidever, D. L.; Olsen, Knut; Walker, Alistair R.; Vivas, A. Katherina; Blum, Robert D.; Kaleida, Catherine; Choi, Yumi; Conn, Blair C.; Gruendl, Robert A.; Bell, Eric F.; Besla, Gurtina; Muñoz, Ricardo R.; Gallart, C.; Martin, Nicolas F.; Olszewski, Edward W.; Saha, Abhijit; Monachesi, Antonela; Monelli, M.; de Boer, Thomas J. L.; Johnson, L. Clifton; Zaritsky, Dennis; Stringfellow, Guy S.; van der Marel, Roeland P.; Cioni, Maria-Rosa L.; Jin, Shoko; Majewski, Steven R.; Martinez-Delgado, David; Monteagudo, L.; Noël, Noelia E. D.; Bernard, Edouard J.; Kunder, Andrea; Chu, You-Hua; Bell, Cameron P. M.; Santana, Felipe; Frechem, Joshua; Medina, Gustavo E.; Parkash, Vaishali; Serón Navarrete, J. C.; Hayes, Christian
Referencia bibliográfica
The Astronomical Journal, Volume 154, Issue 5, article id. 199, 25 pp. (2017).
Fecha de publicación:
11
2017
Número de citas
118
Número de citas referidas
99
Descripción
The Large and Small Magellanic Clouds are unique local laboratories for
studying the formation and evolution of small galaxies in exquisite
detail. The Survey of the MAgellanic Stellar History (SMASH) is an NOAO
community Dark Energy Camera (DECam) survey of the Clouds mapping 480
deg2 (distributed over ∼2400 square degrees at ∼20%
filling factor) to ∼24th mag in ugriz. The primary goals of SMASH
are to identify low surface brightness stellar populations associated
with the stellar halos and tidal debris of the Clouds, and to derive
spatially resolved star formation histories. Here, we present a summary
of the survey, its data reduction, and a description of the first public
Data Release (DR1). The SMASH DECam data have been reduced with a
combination of the NOAO Community Pipeline, the PHOTRED automated
point-spread-function photometry pipeline, and custom calibration
software. The astrometric precision is ∼15 mas and the accuracy is
∼2 mas with respect to the Gaia reference frame. The photometric
precision is ∼0.5%–0.7% in griz and ∼1% in u with a
calibration accuracy of ∼1.3% in all bands. The median 5σ
point source depths in ugriz are 23.9, 24.8, 24.5, 24.2, and 23.5 mag.
The SMASH data have already been used to discover the Hydra II Milky Way
satellite, the SMASH 1 old globular cluster likely associated with the
LMC, and extended stellar populations around the LMC out to R ∼ 18.4
kpc. SMASH DR1 contains measurements of ∼100 million objects
distributed in 61 fields. A prototype version of the NOAO Data Lab
provides data access and exploration tools.
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