CHAMPS: Data Reduction and Detection of ~3300 Dusty Galaxies at 1.2 mm

@misc{martinez2026champs,
  title = {{CHAMPS: Data Reduction and Detection of ~3300 Dusty Galaxies at 1.2 mm}},
  author = {Felix Martinez III and Jeyhan S. Karaltepe and Andreas L. Faisst and Arianna S. Long and Jorge A. Zavala and Caitlin M. Casey and Jed McKinney and Ezequiel Treister and Maximilien Franco and Sune Toft and Manuel Aravena and John D. Silverman and Hollis B. Akins and Hiddo S. B. Algera and Jacqueline Antwi-Danso and Andrew J. Battisti and Yingjie Cheng and Olivia R. Cooper and Nicole E. Drakos and Carter Flayhart and Fabrizio Gentile and Steven Gillman and Ghassem Gozaliasl and Santosh Harish and Simon Hempel-Costello and Michaela Hirschmann and Olivier Ilbert and Bingcheng Jin and Shuowen Jin and Koki Kakiichi and Thresa Kelly and Zihao Li and Daizhong Liu and Lun-Jun Liu and Sinclaire M. Manning and Henry Joy McCracken and Romain A. Meyer and Louise Paquereau and Maria Pudoka and Jason Rhodes and Brant E. Robertson and Giulia Rodighiero and Rasha M. Samir and David B. Sanders and Marko Shuntov and Margherita Talia and Mattia Vaccari and Francesco Valentino and Aswin P. Vijayan and Feige Wang and Wuji Wang and Can Xu and Jinyi Yang and Yongda Zhu and Siwei Zou},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.36076},
  eprint = {2609.36076},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.36076},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - CHAMPS: Data Reduction and Detection of ~3300 Dusty Galaxies at 1.2 mm
AU  - Felix Martinez III
AU  - Jeyhan S. Karaltepe
AU  - Andreas L. Faisst
AU  - Arianna S. Long
AU  - Jorge A. Zavala
AU  - Caitlin M. Casey
AU  - Jed McKinney
AU  - Ezequiel Treister
AU  - Maximilien Franco
AU  - Sune Toft
AU  - Manuel Aravena
AU  - John D. Silverman
AU  - Hollis B. Akins
AU  - Hiddo S. B. Algera
AU  - Jacqueline Antwi-Danso
AU  - Andrew J. Battisti
AU  - Yingjie Cheng
AU  - Olivia R. Cooper
AU  - Nicole E. Drakos
AU  - Carter Flayhart
AU  - Fabrizio Gentile
AU  - Steven Gillman
AU  - Ghassem Gozaliasl
AU  - Santosh Harish
AU  - Simon Hempel-Costello
AU  - Michaela Hirschmann
AU  - Olivier Ilbert
AU  - Bingcheng Jin
AU  - Shuowen Jin
AU  - Koki Kakiichi
AU  - Thresa Kelly
AU  - Zihao Li
AU  - Daizhong Liu
AU  - Lun-Jun Liu
AU  - Sinclaire M. Manning
AU  - Henry Joy McCracken
AU  - Romain A. Meyer
AU  - Louise Paquereau
AU  - Maria Pudoka
AU  - Jason Rhodes
AU  - Brant E. Robertson
AU  - Giulia Rodighiero
AU  - Rasha M. Samir
AU  - David B. Sanders
AU  - Marko Shuntov
AU  - Margherita Talia
AU  - Mattia Vaccari
AU  - Francesco Valentino
AU  - Aswin P. Vijayan
AU  - Feige Wang
AU  - Wuji Wang
AU  - Can Xu
AU  - Jinyi Yang
AU  - Yongda Zhu
AU  - Siwei Zou
PY  - 2026
DA  - 2026/09/28
PB  - arXiv
DO  - 10.48550/arxiv.2609.36076
UR  - https://arxiv.org/abs/2609.36076
AB  - We present the reduction and source catalogs for the \textit{COSMOS High-z ALMA-MIRI Population Survey} (CHAMPS), the largest Atacama Large (Sub)Millimeter Array (ALMA) blank field survey to date at 0.2\,deg^2. With observing frequency centered at $250\, $GHz (1.2mm) and bandwidth of 7.5 GHz, CHAMPS covers the JWST/NIRCam+MIRI footprint in the COSMOS field, taking advantage of the rich, multiwavelength ancillary datasets in COSMOS ranging from X-ray to radio. The majority of the CHAMPS survey (90%) has depths at or below 200 μJy beam^−1 and with an average RMS of 146 μJy beam^−1. The reduced CHAMPS mosaic has a beam size of θ_res = 1.1'' × 1.1''. CHAMPS identifies sources via two detection methods, a blind search for high-SNR sources, and a prior-based search involving MIRI detections to identify faint sources. The blind search yields a total of 595 sources down to an SNR ≥4.5σ while the prior catalog yields a total of 3162 source down to an SNR ≥3σ, leading to a full sample of 3355 unique objects detected across both catalogs. We identify a unique population of 385 SNR ≥5σ sources across the two catalogs; after excluding 9 likely spurious edge detections we define a robust science sample of 376 sources above ≥5σ. These sources have a median redshift of ⟨ z_1.2 mm⟩ = 2.54^+0.89_−1.69 based on optical/near-IR/mid-IR photometric redshifts and high-quality spectroscopic redshifts, and hold a median stellar mass of ⟨log (M_⋆/M_⊙)⟩ = 10.79^+0.42_−3.08. We have further identified 68/376 (∼18%) sources as candidate AGN through X-ray, UV-optical, infrared and radio selection techniques.
ER  -