The multiwavelength Survey by Yale-Chile (MUSYC): Deep medium-band optical imaging and high-quality 32-band photometric redshifts in the ECDF-S

Carolin N. Cardamone, Pieter G. Van Dokkum, C. Megan Urry, Yoshi Taniguchi, Eric Gawiser, Gabriel Brammer, Edward Taylor, Maaike Damen, Ezequiel Treister, Bethany E. Cobb, Nicholas Bond, Kevin Schawinski, Paulina Lira, Takashi Murayama, Tomoki Saito, Kentaro Sumikawa

Research output: Contribution to journalArticle

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Abstract

We present deep optical 18-medium-band photometry from the Subaru telescope over the ∼30′ × 30′ Extended Chandra Deep Field-South, as part of the Multiwav elength Survey by Yale-Chile (MUSYC). This field has a wealth of ground- and space-based ancillary data, and contains the GOODS-South field and the Hubble Ultra Deep Field. We combine the Subaru imaging with existing UBVRIzJHK and Spitzer IRAC images to create a uniform catalog. Detecting sources in the MUSYC "BVR" image we find ∼40,000 galaxies with RAB < 25.3, the median 5σ limit of the 18 medium bands. Photometric redshifts are determined using the EAzY code and compared to ∼2000 spectroscopic red shifts in this field. The medium-band filters provide very accurate redshifts for the (bright) subset of galaxies with spectroscopic red shifts, particularly at 0.1 < z < 1.2 and at z ≳ 3.5. For 0.1 < z < 1.2, we find a 1σ scatter in Δz/(1 + z) of 0.007, similar to results obtained with a similar filter set in the COSMOS field. As a demonstration of the data quality, we show that the red sequence and blue cloud can be cleanly identified in rest-frame color-magnitude diagrams at 0.1 < z < 1.2. We find that ∼20% of the red sequence galaxies show evidence of dust emission at longer rest-frame wavelengths. The reduced images, photometric catalog, and photometric redshifts are provided through the public MUSYCWeb site.

Original languageEnglish (US)
Pages (from-to)270-285
Number of pages16
JournalAstrophysical Journal, Supplement Series
Volume189
Issue number2
DOIs
StatePublished - Aug 1 2010

Fingerprint

Chile
galaxies
red shift
catalogs
filter
filters
color-magnitude diagram
data quality
set theory
photometry
dust
diagram
telescopes
wavelength
wavelengths

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Catalogs
  • Cosmology: observations
  • Galaxies: evolution
  • Galaxies: formation
  • Surveys

Cite this

Cardamone, Carolin N. ; Van Dokkum, Pieter G. ; Urry, C. Megan ; Taniguchi, Yoshi ; Gawiser, Eric ; Brammer, Gabriel ; Taylor, Edward ; Damen, Maaike ; Treister, Ezequiel ; Cobb, Bethany E. ; Bond, Nicholas ; Schawinski, Kevin ; Lira, Paulina ; Murayama, Takashi ; Saito, Tomoki ; Sumikawa, Kentaro. / The multiwavelength Survey by Yale-Chile (MUSYC) : Deep medium-band optical imaging and high-quality 32-band photometric redshifts in the ECDF-S. In: Astrophysical Journal, Supplement Series. 2010 ; Vol. 189, No. 2. pp. 270-285.
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author = "Cardamone, {Carolin N.} and {Van Dokkum}, {Pieter G.} and Urry, {C. Megan} and Yoshi Taniguchi and Eric Gawiser and Gabriel Brammer and Edward Taylor and Maaike Damen and Ezequiel Treister and Cobb, {Bethany E.} and Nicholas Bond and Kevin Schawinski and Paulina Lira and Takashi Murayama and Tomoki Saito and Kentaro Sumikawa",
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Cardamone, CN, Van Dokkum, PG, Urry, CM, Taniguchi, Y, Gawiser, E, Brammer, G, Taylor, E, Damen, M, Treister, E, Cobb, BE, Bond, N, Schawinski, K, Lira, P, Murayama, T, Saito, T & Sumikawa, K 2010, 'The multiwavelength Survey by Yale-Chile (MUSYC): Deep medium-band optical imaging and high-quality 32-band photometric redshifts in the ECDF-S', Astrophysical Journal, Supplement Series, vol. 189, no. 2, pp. 270-285. https://doi.org/10.1088/0067-0049/189/2/270

The multiwavelength Survey by Yale-Chile (MUSYC) : Deep medium-band optical imaging and high-quality 32-band photometric redshifts in the ECDF-S. / Cardamone, Carolin N.; Van Dokkum, Pieter G.; Urry, C. Megan; Taniguchi, Yoshi; Gawiser, Eric; Brammer, Gabriel; Taylor, Edward; Damen, Maaike; Treister, Ezequiel; Cobb, Bethany E.; Bond, Nicholas; Schawinski, Kevin; Lira, Paulina; Murayama, Takashi; Saito, Tomoki; Sumikawa, Kentaro.

In: Astrophysical Journal, Supplement Series, Vol. 189, No. 2, 01.08.2010, p. 270-285.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The multiwavelength Survey by Yale-Chile (MUSYC)

T2 - Deep medium-band optical imaging and high-quality 32-band photometric redshifts in the ECDF-S

AU - Cardamone, Carolin N.

AU - Van Dokkum, Pieter G.

AU - Urry, C. Megan

AU - Taniguchi, Yoshi

AU - Gawiser, Eric

AU - Brammer, Gabriel

AU - Taylor, Edward

AU - Damen, Maaike

AU - Treister, Ezequiel

AU - Cobb, Bethany E.

AU - Bond, Nicholas

AU - Schawinski, Kevin

AU - Lira, Paulina

AU - Murayama, Takashi

AU - Saito, Tomoki

AU - Sumikawa, Kentaro

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N2 - We present deep optical 18-medium-band photometry from the Subaru telescope over the ∼30′ × 30′ Extended Chandra Deep Field-South, as part of the Multiwav elength Survey by Yale-Chile (MUSYC). This field has a wealth of ground- and space-based ancillary data, and contains the GOODS-South field and the Hubble Ultra Deep Field. We combine the Subaru imaging with existing UBVRIzJHK and Spitzer IRAC images to create a uniform catalog. Detecting sources in the MUSYC "BVR" image we find ∼40,000 galaxies with RAB < 25.3, the median 5σ limit of the 18 medium bands. Photometric redshifts are determined using the EAzY code and compared to ∼2000 spectroscopic red shifts in this field. The medium-band filters provide very accurate redshifts for the (bright) subset of galaxies with spectroscopic red shifts, particularly at 0.1 < z < 1.2 and at z ≳ 3.5. For 0.1 < z < 1.2, we find a 1σ scatter in Δz/(1 + z) of 0.007, similar to results obtained with a similar filter set in the COSMOS field. As a demonstration of the data quality, we show that the red sequence and blue cloud can be cleanly identified in rest-frame color-magnitude diagrams at 0.1 < z < 1.2. We find that ∼20% of the red sequence galaxies show evidence of dust emission at longer rest-frame wavelengths. The reduced images, photometric catalog, and photometric redshifts are provided through the public MUSYCWeb site.

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KW - Catalogs

KW - Cosmology: observations

KW - Galaxies: evolution

KW - Galaxies: formation

KW - Surveys

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