Edinburgh Research Explorer

CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey—The Hubble Space Telescope Observations, Imaging Data Products, and Mosaics

Research output: Contribution to journalArticle

  • Anton M. Koekemoer
  • S. M. Faber
  • Henry C. Ferguson
  • Norman A. Grogin
  • Dale D. Kocevski
  • David C. Koo
  • Kamson Lai
  • Jennifer M. Lotz
  • Ray A. Lucas
  • Elizabeth J. McGrath
  • Sara Ogaz
  • Abhijith Rajan
  • Adam G. Riess
  • Steve A. Rodney
  • Louis Strolger
  • Stefano Casertano
  • Marco Castellano
  • Tomas Dahlen
  • Mark Dickinson
  • Timothy Dolch
  • Adriano Fontana
  • Mauro Giavalisco
  • Andrea Grazian
  • Yicheng Guo
  • Nimish P. Hathi
  • Kuang-Han Huang
  • Arjen van der Wel
  • Hao-Jing Yan
  • Viviana Acquaviva
  • David M. Alexander
  • Matthew L. N. Ashby
  • Marco Barden
  • Eric F. Bell
  • Frederic Bournaud
  • Thomas M. Brown
  • Paolo Cassata
  • Peter J. Challis
  • Ranga-Ram Chary
  • Edmond Cheung
  • Christopher J. Conselice
  • Asantha Roshan Cooray
  • Darren J. Croton
  • Emanuele Daddi
  • Duilia F. de Mello
  • Loic de Ravel
  • Avishai Dekel
  • Jennifer L. Donley
  • Aaron A. Dutton
  • David Elbaz
  • Giovanni G. Fazio
  • Alexei V. Filippenko
  • Steven L. Finkelstein
  • Chris Frazer
  • Jonathan P. Gardner
  • Peter M. Garnavich
  • Eric Gawiser
  • Ruth Gruetzbauch
  • Will G. Hartley
  • Boris Haeussler
  • Jessica Herrington
  • Philip F. Hopkins
  • Jia-Sheng Huang
  • Saurabh W. Jha
  • Andrew Johnson
  • Jeyhan S. Kartaltepe
  • Ali A. Khostovan
  • Robert P. Kirshner
  • Caterina Lani
  • Kyoung-Soo Lee
  • Weidong Li
  • Piero Madau
  • Patrick J. McCarthy
  • Daniel H. McIntosh
  • Conor McPartland
  • Bahram Mobasher
  • Heidi Moreira
  • Alice Mortlock
  • Leonidas A. Moustakas
  • Mark Mozena
  • Kirpal Nandra
  • Jeffrey A. Newman
  • Jennifer L. Nielsen
  • Sami Niemi
  • Kai G. Noeske
  • Casey J. Papovich
  • Laura Pentericci
  • Alexandra Pope
  • Joel R. Primack
  • Swara Ravindranath
  • Naveen A. Reddy
  • Alvio Renzini
  • Hans-Walter Rix
  • Aday R. Robaina
  • David J. Rosario
  • Piero Rosati
  • Sara Salimbeni
  • Claudia Scarlata
  • Brian Siana
  • Luc Simard
  • Joseph Smidt
  • Diana Snyder
  • Rachel S. Somerville
  • Hyron Spinrad
  • Amber N. Straughn
  • Olivia Telford
  • Harry I. Teplitz
  • Jonathan R. Trump
  • Carlos Vargas
  • Carolin Villforth
  • Cory R. Wagner
  • Pat Wandro
  • Risa H. Wechsler
  • Benjamin J. Weiner
  • Tommy Wiklind
  • Grant Wilson
  • Stijn Wuyts
  • Min S. Yun

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Original languageEnglish
Article number36
JournalThe Astrophysical Journal Supplement Series
Issue number2
Publication statusPublished - Dec 2011


This paper describes the Hubble Space Telescope imaging data products and data reduction procedures for the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS). This survey is designed to document the evolution of galaxies and black holes at z ≈ 1.5-8, and to study Type Ia supernovae at z > 1.5. Five premier multi-wavelength sky regions are selected, each with extensive multi-wavelength observations. The primary CANDELS data consist of imaging obtained in the Wide Field Camera 3 infrared channel (WFC3/IR) and the WFC3 ultraviolet/optical channel, along with the Advanced Camera for Surveys (ACS). The CANDELS/Deep survey covers ~125 arcmin2 within GOODS-N and GOODS-S, while the remainder consists of the CANDELS/Wide survey, achieving a total of ~800 arcmin2 across GOODS and three additional fields (Extended Groth Strip, COSMOS, and Ultra-Deep Survey). We summarize the observational aspects of the survey as motivated by the scientific goals and present a detailed description of the data reduction procedures and products from the survey. Our data reduction methods utilize the most up-to-date calibration files and image combination procedures. We have paid special attention to correcting a range of instrumental effects, including charge transfer efficiency degradation for ACS, removal of electronic bias-striping present in ACS data after Servicing Mission 4, and persistence effects and other artifacts in WFC3/IR. For each field, we release mosaics for individual epochs and eventual mosaics containing data from all epochs combined, to facilitate photometric variability studies and the deepest possible photometry. A more detailed overview of the science goals and observational design of the survey are presented in a companion paper.

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