ALMA Lensing Cluster Survey: $HST$ and $Spitzer$ Photometry of 33 Lensed Fields Built with CHArGE

Abstract

We present a set of multi-wavelength mosaics and photometric catalogs in the ALMA lensing cluster survey (ALCS) fields. The catalogs were built by reprocessing of archival data from the CHArGE compilation, taken by the $\text{Hubble Space Telescope}$ ($\text{HST}$) in the RELICS, CLASH and Hubble Frontier Fields. Additionally we have reconstructed the $\text{Spitzer}$ IRAC 3.6 and 4.5 $\hat{I}¼$m mosaics, by utilising all the available archival IRSA/SHA exposures. To alleviate the effect of blending in such a crowded region, we have modelled the $\text{Spitzer}$ photometry by convolving the $\text{HST}$ detection image with the $\text{Spitzer}$ PSF using the novel $\text{golfir}$ software. The final catalogs contain 218,000 sources, covering a combined area of 690 arcmin${}^2$. These catalogs will serve as an important tool in aiding the search of the sub-mm galaxies in future ALMA surveys, as well as follow ups of the $\text{HST}$ dark - IRAC sources. Coupled with the available $\text{HST}$ photometry the addition of the 3.6 and 4.5 $\hat{I}¼$m bands will allow us to place a better constraint on photometric redshifts and stellar masses of these objects, thus giving us an opportunity to identify high-redshift candidates for spectroscopic follow ups and answer the important questions regarding the epoch of reionization and formation of first galaxies.

41 pages, 16 figures, 8 tables. Accepted to ApJS. Mosaics and photometric catalogs can be accessed online https://github.com/dawn-cph/alcs-clusters