The BUFFALO HST Survey

The Astrophysical Journal Supplement Series, vol. 247, pp. 64

Abstract

Abstract The Beyond Ultra-deep Frontier Fields and Legacy Observations (BUFFALO) is a 101 orbit + 101 parallel Cycle 25 Hubble Space Telescope ( HST ) Treasury program taking data from 2018 to 2020. BUFFALO will expand existing coverage of the Hubble Frontier Fields (HFF) in Wide Field Camera 3/IR F105W, F125W, and F160W and Advanced Camera for Surveys/WFC F606W and F814W around each of the six HFF clusters and flanking fields. This additional area has not been observed by HST but is already covered by deep multiwavelength data sets, including Spitzer and Chandra . As with the original HFF program, BUFFALO is designed to take advantage of gravitational lensing from massive clusters to simultaneously find high-redshift galaxies that would otherwise lie below HST detection limits and model foreground clusters to study the properties of dark matter and galaxy assembly. The expanded area will provide the first opportunity to study both cosmic variance at high redshift and galaxy assembly in the outskirts of the large HFF clusters. Five additional orbits are reserved for transient follow-up. BUFFALO data including mosaics, value-added catalogs, and cluster mass distribution models will be released via MAST on a regular basis as the observations and analysis are completed for the six individual clusters.

Authors 12

1. Charles Louis Steinhardt corresponding

   University of Copenhagen

   Affiliation as printed

   Cosmic Dawn Center (DAWN), Denmark; steinhardt@nbi.ku.dk

   Niels Bohr Institute, University of Copenhagen, Lyngbyvej 2, Copenhagen Ø DK-2100, Denmark

2. Mathilde Jauzac

   Durham University · University of KwaZulu-Natal

   Affiliation as printed

   Astrophysics and Cosmology Research Unit, School of Mathematical Sciences, University of KwaZulu-Natal, Durban 4041, South Africa

   Centre for Extragalactic Astronomy, Durham University, South Road, Durham DH1 3LE, UK

   Institute for Computational Cosmology, Durham University, South Road, Durham DH1 3LE, UK

3. Hakim Atek

   Centre National de la Recherche Scientifique · Institut d'Astrophysique de Paris · Sorbonne Université

   Affiliation as printed

   Institut d’astrophysique de Paris, CNRS UMR7095, Sorbonne Université, 98bis Boulevard Arago, F-75014 Paris, France

4. P. Capak

   California Institute of Technology · Infrared Processing and Analysis Center

   Affiliation as printed

   Cosmic Dawn Center (DAWN), Denmark; steinhardt@nbi.ku.dk

   IPAC, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USA

5. Anton M. Koekemoer

   Space Telescope Science Institute

   Affiliation as printed

   Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21218, USA

6. Anna Niemiec

   University of Michigan

   Affiliation as printed

   Department of Astronomy, University of Michigan, 1085 S. University Ave., Ann Arbor, MI 48109, USA

7. Johan Richard

   Centre National de la Recherche Scientifique · Centre de Recherche Astrophysique de Lyon

   Affiliation as printed

   Univ Lyon, Univ Lyon1, Ens de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon UMR5574, F-69230, Saint-Genis-Laval, France

8. Keren Sharon

   University of Michigan

   Affiliation as printed

   Department of Astronomy, University of Michigan, 1085 S. University Ave., Ann Arbor, MI 48109, USA

9. Tom J. Broadhurst

   University of the Basque Country · Donostia International Physics Center

   Affiliation as printed

   Department of Physics, University of the Basque Country, Spain

   Donostia International Physics Center, San Sebastian, Spain

10. Lukas J. Furtak

    Centre National de la Recherche Scientifique · Institut d'Astrophysique de Paris · Sorbonne Université

    Affiliation as printed

    Institut d’astrophysique de Paris, Sorbonne Université, CNRS UMR 7095, 98 bis bd Arago, F-75014 Paris, France

11. Massimo Meneghetti

    Osservatorio di Astrofisica e Scienza dello Spazio · National Institute for Astrophysics

    Affiliation as printed

    INAF–Osservatorio di Astrofisica e Scienza dello Spazio, Via Gobetti 93/3, I-40129 Bologna, Italy

12. Mark C. Neyrinck

    Ikerbasque · University of the Basque Country

    Affiliation as printed

    Department of Theoretical Physics, University of the Basque Country UPV/EHU, E-48080 Bilbao, Spain

    Ikerbasque, Basque Foundation for Science, E-48011 Bilbao, Spain