The Hubble Space Telescope Wide Field Camera 3 Early Release Science data: Panchromatic Faint Object Counts for 0.2-2 microns wavelength
Rogier A. Windhorst, Seth H. Cohen, Nimish P. Hathi, Patrick J. McCarthy, Russell E. Ryan,, Haojing Yan, Ivan K. Baldry, Simon P. Driver, Jay A. Frogel, David T… 展开作者
Rogier A. Windhorst, Seth H. Cohen, Nimish P. Hathi, Patrick J. McCarthy, Russell E. Ryan,, Haojing Yan, Ivan K. Baldry, Simon P. Driver, Jay A. Frogel, David T. Hill, Lee S. Kelvin, Anton M. Koekemoer, Matt Mechtley, Robert W. O'Connell, Aaron S. G. Robotham, Michael J. Rutkowski, Mark Seibert, Richard J. Tuffs, Bruce Balick, Howard E. Bond, Howard Bushouse, Daniela Calzetti, Mark Crockett, Michael J. Disney, Michael A. Dopita, Donald N. B. Hall, Jon A. Holtzman, Sugata Kaviraj, Randy A. Kimble, John W. MacKenty, Max Mutchler, Francesco Paresce, Abihit Saha, Joseph I. Silk, John Trauger, Alistair R. Walker, Bradley C. Whitmore, Erick Young
We describe the Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) Early Release Science (ERS) observations in the Great Observatories Origins Deep Survey (GOODS) South field. The new WFC3 ERS data provide calibrated, drizzled mosaics in the UV filters F225W, F275W, and F336W, as well as in the near-IR filters F098M (Ys), F125W (J), and F160W (H) with 1-2 HST orbits per filter. Together with the existing HST Advanced Camera for Surveys (ACS) GOODS-South mosaics in the BViz filters, these panchromatic 10-band ERS data cover 40-50 square arcmin at 0.2-1.7 μm in wavelength at 0.07-0.15" FWHM resolution and 0.090" Multidrizzled pixels to depths of AB\simeq 26.0-27.0 mag (5-σ) for point sources, and AB\simeq 25.5-26.5 mag for compact galaxies.
In this paper, we describe: a) the scientific rationale, and the data taking plus reduction procedures of the panchromatic 10-band ERS mosaics; b) the procedure of generating object catalogs across the 10 different ERS filters, and the specific star-galaxy separation techniques used; and c) the reliability and completeness of the object catalogs from the WFC3 ERS mosaics. The excellent 0.07-0.15" FWHM resolution of HST/WFC3 and ACS makes star- galaxy separation straightforward over a factor of 10 in wavelength to AB\simeq 25-26 mag from the UV to the near-IR, respectively.
SKYSURF: Constraints on Zodiacal Light and Extragalactic Background Light through Panchromatic HST All-Sky Surface-Brightness Measurements: II. First Limits on Diffuse Light at 1.25, 1.4, and 1.6 microns
我们目前的第一个结果，从HST档案遗产项目"天空冲浪。正如Windhorst等人在2022年所述，SKYSURF利用大型HST档案来详细研究漫射紫外线，光学和近红外背景和前景。在这里，我们利用SKYSURF的第一个天空表面亮度测量来限制近红外漫射河外背景光（EBL）的水平。我们的天空表面亮度测量结果已被验证为优于1%的精度，当与HST相关的系统误差相结合时，导致每张图像中的天空亮度不确定度为$\sim$ 2 - 4% $\simeq$ 0.005 MJy/sr。我们通过比较我们对$> 30,000$图像和黄道光模型的初步天空测量，对三种近红外滤光片（F125 W、F140 W和F160 W）中的漫射EBL量进行了限制，仔细选择最暗的图像以避免杂散光的污染。此外，我们调查了仪器热辐射对我们测量的影响，发现它对F125W和F140W测量的影响有限，而HST的确切热状态的不确定性导致F160W图像中天体物理漫射光水平的显著不确定性。与Kelsall等人（1998）的黄道模型相比，$30$ nW m $^{-2}$ sr $^{-1}$的各向同性漫射背景仍然存在，而使用Wright（1998）的黄道模型则不会产生可辨别的漫射背景。主要基于前景模型减法中的不确定性，我们分别对F125 W、F140 W和F160 W的29 nW m $^{-2}$ sr $^{-1}$、40 nW m $^{…
Evidence for Infrared-Faint Radio Sources as z > 1 Radio-Loud AGN
暗射电源（英语：Inferred-Faint Radio Source，缩写IFRS）是在澳大利亚望远镜大区域巡天（英语：Australia Telescope Large Area Survey）中发现的一类射电源，在斯皮策广域河外红外线巡天（英语：Spitzer Wide-area Infrared Extragaltic）中没有可观测到的中红外线对应物。扩展后的Chandra Deep Field South现在有更深的斯皮策成像（3.6至70微米），来自一些传统的调查。我们报告了两个IFRS源在IRAC图像中的检测。另外两个IFRS的未检测允许我们限制源类型。对这些天体的SED的详细模拟表明，它们与高红移（z > 1）活动星系核相一致。
