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This paper presents multiwavelength photometric catalogues of the last twoHubble Frontier Fields (HFF), the massive galaxy clusters Abell 370 and RXCJ2248.7-4431. The photometry ranges from imaging performed on the Hubble SpaceTelescope (HST) to ground based Very Large Telescope (VLT) and Spitzer/IRAC, incollaboration with the ASTRODEEP team, and using the ASTRODEEP pipeline. Whilethe main purpose of this paper is to release the catalogues, we also perform,as a proof of concept, a brief analysis of z > 6 objects selected usingdrop-out method, as well as spectroscopically confirmed sources and multipleimages in both clusters. While dropout methods yield a sample of high-zgalaxies, the addition of longer wavelength data reveals that as expected thesamples have substantial contamination at the ~30-45% level by dusty galaxiesat lower redshifts. Furthermore, we show that spectroscopic redshifts are stillrequired to unambiguously determine redshifts of multiply imaged systems.Finally, the now publicly available ASTRODEEP catalogues were combined for allHFFs and used to explore stellar properties of a large sample of 20,000galaxies across a large photometric redshift range. The powerful magnificationprovided by the HFF clusters allows us an exploration of the properties ofgalaxies with intrinsic stellar masses as low as $M_* \gtrsim 10^7M_{\odot}$and intrinsic star formation rates $\mbox{SFRs}\sim 0.1\mbox{-}1M_\odot/\mboxyr$ at z > 6.

monthly notices of the royal astronomical society

Hubble Frontier Field Photometric Catalogues of Abell 370 and RXC  J2248.7-4431: Multiwavelength photometry, photometric redshifts, and stellar  properties