Ultra-Deep Ks-band imaging data of Hubble Frontier Fields released
This release provides reduced Ks-band mosaics of the Hubble Frontier Fields obtained with the High Acuity Wide field K-band Imager (HAWK-I) at the ESO VLT 8.2-meter Unit Telescope. The first two fields, Abell 2744 and MACS-0416, were observed with HAWK-I on UT4 in P92 and the second two fields, Abell S1063 and Abell 370, were observed in P95 (PI: Gabriel Brammer).
The quality of the final mosaics are quite uniform between all of the surveys fields, reaching point source limiting magnitudes of Ks~26.0 (AB, 5 sigma) with superb image quality, FWHM~0.4 arcsec for point sources. This data release also includes two northern Frontier Fields clusters, MACS-0717 and MACS-1149, which were observed with the Keck/MOSFIRE instrument. The total sky area covered in the Ks-band is 490 square arcminutes.