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arXiv 2103.07476astro-ph.GAastro-ph.COastro-ph.SR
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DECam局部体积探索调查:概述和首次数据发布

The DECam Local Volume Exploration Survey: Overview and First Data Release

A. Drlica-Wagner, J. L. Carlin, D. L. Nidever, P. S. Ferguson, N. Kuropatkin, M. Adamów, W. Cerny, Y. Choi, J. H. Esteves, C. E. Martínez-Vázquez, S. Mau, A. E.… 展开作者

A. Drlica-Wagner, J. L. Carlin, D. L. Nidever, P. S. Ferguson, N. Kuropatkin, M. Adamów, W. Cerny, Y. Choi, J. H. Esteves, C. E. Martínez-Vázquez, S. Mau, A. E. Miller, B. Mutlu-Pakdil, E. H. Neilsen, K. A. G. Olsen, A. B. Pace, A. H. Riley, J. D. Sakowska, D. J. Sand, L. Santana-Silva, E. J. Tollerud, D. L. Tucker, A. K. Vivas, E. Zaborowski, A. Zenteno, T. M. C. Abbott, S. Allam, K. Bechtol, C. P. M. Bell, E. F. Bell, P. Bilaji, C. R. Bom, J. A. Carballo-Bello, M. -R. L. Cioni, A. Diaz-Ocampo, T. J. L. de Boer, D. Erkal, R. A. Gruendl, D. Hernandez-Lang, A. K. Hughes, D. J. James, L. C. Johnson, T. S. Li, Y. -Y. Mao, D. Martínez-Delgado, P. Massana, M. McNanna, R. Morgan, E. O. Nadler, N. E. D. Noël, A. Palmese, A. H. G. Peter, E. S. Rykoff, J. Sánchez, N. Shipp, J. D. Simon, A. Smercina, M. Soares-Santos, G. S. Stringfellow, K. Tavangar, R. P. van der Marel, A. R. Walker, R. H. Wechsler, J. F. Wu, B. Yanny, M. Fitzpatrick, L. Huang, A. Jacques, R. Nikutta, A. Scott

摘要:

DECam局部体积探测巡天(DELVE)是智利托洛洛山美洲天文台4米布兰科望远镜上的一个126晚巡天计划。DELVE试图了解微弱的卫星星系和其他解决恒星子结构在一系列环境中的本地卷的特点。DELVE将把新的DECam观测数据与DECam档案数据结合起来,以覆盖高银河系纬度约15000度的$^2$(|b| > 10度)南部天空,5 $σ$深度为g,r,i,z ~ 23.5等。此外,DELVE将覆盖麦哲伦云周围~2200度$^2$的区域,深度为g,r,i ~ 24.5等,面积约135度$^2$周围的四个麦哲伦类似物的深度为g,i ~ 25.5等。在这里,我们提出了一个概述的DELVE计划和进展到目前为止。我们还总结了第一个DELVE公开数据发布(DELVE DR 1),其为覆盖南方天空的~5000度$^2$至g=24.3、r=23.9、i=23.3的5 $σ$点源深度的~ 5.2亿个天文源提供点源和自动孔径测光,DELVE DR 1可通过NOIRLab天文数据实验室科学平台公开获得。

英文摘要:

The DECam Local Volume Exploration survey (DELVE) is a 126-night survey program on the 4-m Blanco Telescope at the Cerro Tololo Inter-American Observatory in Chile. DELVE seeks to understand the characteristics of faint satellite galaxies and other resolved stellar substructures over a range of environments in the Local Volume. DELVE will combine new DECam observations with archival DECam data to cover ~15000 deg$^2$ of high-Galactic-latitude (|b| > 10 deg) southern sky to a 5$σ$ depth of g,r,i,z ~ 23.5 mag. In addition, DELVE will cover a region of ~2200 deg$^2$ around the Magellanic Clouds to a depth of g,r,i ~ 24.5 mag and an area of ~135 deg$^2$ around four Magellanic analogs to a depth of g,i ~ 25.5 mag. Here, we present an overview of the DELVE program and progress to date. We also summarize the first DELVE public data release (DELVE DR1), which provides point-source and automatic aperture photometry for ~520 million astronomical sources covering ~5000 deg$^2$ of the southern sky to a 5$σ$ point-source depth of g=24.3, r=23.9, i=23.3, and z=22.8 mag. DELVE DR1 is publicly available via the NOIRLab Astro Data Lab science platform.

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