Data from : SKY-SURF: Panchromatic constraints on the Extragalactic Background Light and Zodical Light sources through all-sky foreground measurements

  • Rogier A. Windhorst (Creator)
  • Russell E. Ryan (Creator)
  • Richard G. Arendt (Creator)
  • Stefano Casertano (Creator)
  • Seth H. Cohen (Creator)
  • Simon Driver (Creator)
  • Eli Dwekg (Creator)
  • Norman Grogin (Creator)
  • Rolf A. Jansen (Creator)
  • Alexander Kashlinsky (Creator)
  • Scott J. Kenyon (Creator)
  • Anton M. Koekemoer (Creator)
  • John W. MacKenty (Creator)
  • Norbert Pirzkal (Creator)
  • Aaron Robotham (Creator)



More than 95% of all photons in the HST Archive come from <5 AU. Yet, no precise panchromatic all-sky HST measurement of foregrounds exists. Project SKY-SURF will use HST's unique capability as absolute photometer to measure the absolute 0.2-1.7 micron all-sky surface brightness (SB) from 57,302 ACS and WFC3 datasets in 1100 fields. This Legacy dataset will constrain the diffuse UV-nearIR sky components: Zodiacal Light (ZL; inner solar system), Kuiper Belt Objects (KBOs; outer solar system), Diffuse Galactic Light (DGL), and Extragalactic Background Light (EBL). SKY-SURF will:

(1) construct optimized panchromatic object catalogs, and an all-sky model of the (time-dependent) ZL, plus the DGL at 10 deg resolution in the UV,U,B,V,r,i,z,Y,J,H filters free of discrete objects;
(2) determine the integrated EBL to <3% by measuring panchromatic galaxy counts over 1100 HST fields, averaging over cosmic-variance effects on the EBL, as most of the EBL comes from 18-25 mag galaxies.
We will use SKY-SURF's panchromatic ZL+DGL model to:
(3) help recalibrate the direct EBL measurements to <4%;
(4) assess how much DIFFUSE EBL can exist beyond the (extrapolated) discrete galaxy counts: Intra-galaxy Halo Light, Intra-Group Light, Intra-Cluster Light, etc.;
(5) constrain the count-slope of very faint KBOs and grains in the outer solar system at R>28 mag, sampling their size-distribution from 1 km-0.1 mm; constrain the KBO flux-integral as a small excess on top of the Zodi foreground around Ecliptic latitude b_Ecl 0.
(6) release to MAST panchromatic legacy products: optimized object catalogs, absolutely calibrated sky-SB data, and models of the ZL(t), DGL, and EBL.
Date made availableJun 2019
PublisherSAO/NASA Astrophysics Data System (ADS)

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