Herschel 多层河外巡天：混淆主导的 SPIRE 图像中的源提取与交叉证认
宇宙学与河外天体物理
2015-05-19 v1
摘要
我们介绍了用于处理作为 Herschel 多层河外巡天 (HerMES) 一部分的 Herschel SPIRE 成像的交叉证认和源测光技术。交叉证认在图像空间中进行，以最小化源混合效应。我们结合使用线性反演和模型选择技术，基于 Spitzer MIPS 24 微米源位置生成可靠的交叉证认星表。对模拟和真实 Herschel 观测的测试表明，该方法即使对于最暗的源 S250~10 mJy 也能给出稳健的结果。我们将新技术应用于 HerMES SPIRE 观测，这些观测是 Herschel 科学演示阶段的一部分。对于我们的真实 SPIRE 观测，我们表明，对于明亮且不混淆的源，我们的流量密度估计与 Smith 等人 2010 年通过更传统的点源探测方法 (SussExtractor; Savage & Oliver et al. 2006) 产生的结果吻合良好。与 SPIRE 波段中测量的源数密度相比，我们表明我们的方法允许恢复比这些传统方法更大比例的暗源。然而，这种完备性严重依赖于现有 24 微米星表和 SPIRE 成像的相对深度。使用我们在 GOODS-N 中最深的多波长数据集，我们估计在其他场中使用浅层 24 微米数据会在 250 微米处引入 20-40% 的暗端不完备性。
引用
@article{arxiv.1009.1658,
title = {The Herschel Multi-Tiered Extragalactic Survey: Source Extraction and Cross-Identifications in Confusion-Dominated SPIRE Images},
author = {I. G. Roseboom and S. J. Oliver and M. Kunz and B. Altieri and A. Amblard and V. Arumugam and R. Auld and H. Aussel and T. Babbedge and M. Béthermin and A. Blain and J. Bock and A. Boselli and D. Brisbin and V. Buat and D. Burgarella and N. Castro-Rodríguez and A. Cava and P. Chanial and E. Chapin and D. L. Clements and A. Conley and L. Conversi and A. Cooray and C. D. Dowell and E. Dwek and S. Dye and S. Eales and D. Elbaz and D. Farrah and M. Fox and A. Franceschini and W. Gear and J. Glenn and E. A. González Solares and M. Griffin and M. Halpern and M. Harwit and E. Hatziminaoglou and J. Huang and E. Ibar and K. Isaak and R. J. Ivison and G. Lagache and L. Levenson and N. Lu and S. Madden and B. Maffei and G. Mainetti and L. Marchetti and G. Marsden and A. M. J. Mortier and H. T. Nguyen and B. O'Halloran and A. Omont and M. J. Page and P. Panuzzo and A. Papageorgiou and H. Patel and C. P. Pearson and I. Pérez-Fournon and M. Pohlen and J. I. Rawlings and G. Raymond and D. Rigopoulou and D. Rizzo and M. Rowan-Robinson and M. Sánchez Portal and B. Schulz and Douglas Scott and N. Seymour and D. L. Shupe and A. J. Smith and J. A. Stevens and M. Symeonidis and M. Trichas and K. E. Tugwell and M. Vaccari and I. Valtchanov and J. D. Vieira and L. Vigroux and L. Wang and R. Ward and G. Wright and C. K. Xu and M. Zemcov},
journal= {arXiv preprint arXiv:1009.1658},
year = {2015}
}
备注
Accepted for publication in MNRAS, 19 pages, 11 figures