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Steinhardt, Charles L.; Jauzac, Mathilde; Acebron, Ana; Atek, Hakim; Capak, Peter; Davidzon, Iary; Eckert, Dominique; Harvey, David; Koekemoer, Anton M.; Lagos, Claudia D.P.; Mahler, Guillaume; Montes, Mireia; Niemiec, Anna; Nonino, Mario; Oesch, P.A.; Richard, Johan; Rodney, Steven A.; Schaller, Matthieu; Sharon, Keren; Strolger, Louis-Gregory; Allingham, Joseph; Amara, Adam; Bahé, Yannick; Bœhm, Céline; Bose, Sownak; Bouwens, Rychard J.; Bradley, Larry D.; Brammer, Gabriel; Broadhurst, Tom; Cañas, Rodrigo; Cen, Renyue; Clément, Benjamin; Clowe, Douglas; Coe, Dan; Connor, Thomas; Darvish, Behnam; Diego, Jose M.; Ebeling, Harald; Edge, A.C.; Egami, Eiichi; Ettori, Stefano; Faisst, Andreas L.; Frye, Brenda; Furtak, Lukas J.; Gómez-Guijarro, C.; Remolina González, J.D.; Gonzalez, Anthony; Graur, Or; Gruen, Daniel; Hensley, Hagan; Hovis-Afflerbach, Beryl; Jablonka, Pascale; Jha, Saurabh W.; Jullo, Eric; Kneib, Jean-Paul; Kokorev, Vasily; Lagattuta, David J.; Limousin, Marceau; von der Lin...

The BUFFALO HST Survey Thumbnail


Charles L. Steinhardt

Ana Acebron

Hakim Atek

Peter Capak

Iary Davidzon

Dominique Eckert

David Harvey

Anton M. Koekemoer

Claudia D.P. Lagos

Guillaume Mahler

Mireia Montes

Anna Niemiec

Mario Nonino

P.A. Oesch

Johan Richard

Steven A. Rodney

Matthieu Schaller

Keren Sharon

Louis-Gregory Strolger

Joseph Allingham

Adam Amara

Yannick Bahé

Céline Bœhm

Sownak Bose

Rychard J. Bouwens

Larry D. Bradley

Gabriel Brammer

Tom Broadhurst

Rodrigo Cañas

Renyue Cen

Benjamin Clément

Douglas Clowe

Dan Coe

Thomas Connor

Behnam Darvish

Jose M. Diego

Harald Ebeling

Eiichi Egami

Stefano Ettori

Andreas L. Faisst

Brenda Frye

Lukas J. Furtak

C. Gómez-Guijarro

J.D. Remolina González

Anthony Gonzalez

Or Graur

Daniel Gruen

Hagan Hensley

Beryl Hovis-Afflerbach

Pascale Jablonka

Saurabh W. Jha

Eric Jullo

Jean-Paul Kneib

Vasily Kokorev

Marceau Limousin

Anja von der Linden

Nora B. Linzer

Adrian Lopez

Georgios E. Magdis

Daniel C. Masters

Matteo Maturi

Curtis McCully

Sean L. McGee

Massimo Meneghetti

Bahram Mobasher

Leonidas A. Moustakas

Eric J. Murphy

Priyamvada Natarajan

Mark Neyrinck

Kyle O’Connor

Masamune Oguri

Amanda Pagul

Jason Rhodes

R. Michael Rich

Mauro Sereno

Huanyuan Shan

Graham P. Smith

Albert Sneppen

Gordon K. Squires

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Sut-Ieng Tam
PGR Student Doctor of Philosophy

Céline Tchernin

Sune Toft

Keiichi Umetsu

John R. Weaver

R.J. van Weeren

Liliya L.R. Williams

Tom J. Wilson

Lin Yan

Adi Zitrin


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 followup. 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.


Steinhardt, C. L., Jauzac, M., Acebron, A., Atek, H., Capak, P., Davidzon, I., …Zitrin, A. (2020). The BUFFALO HST Survey. Astrophysical Journal Supplement, 247(2), Article 64.

Journal Article Type Article
Acceptance Date Dec 27, 2020
Online Publication Date Apr 3, 2020
Publication Date Apr 30, 2020
Deposit Date Apr 23, 2020
Publicly Available Date Apr 23, 2020
Journal Astrophysical Journal Supplement
Print ISSN 0067-0049
Electronic ISSN 1538-4365
Publisher American Astronomical Society
Peer Reviewed Peer Reviewed
Volume 247
Issue 2
Article Number 64


Published Journal Article (1.7 Mb)

Copyright Statement
© 2020. The American Astronomical Society. All rights reserved.

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