We present a strong-lensing analysis of four massive galaxy clusters imaged with the Hubble Space Telescope in the Reionization Lensing Cluster Survey .
We use a Light-Traces-Mass technique to uncover sets of multiply images and constrain the mass distribution of the clusters .
These mass models are the first published for Abell S295 and MACS J0159.8-0849 , and are improvements over previous models for Abell 697 and MACS J0025.4-1222 .
Our analysis for MACS J0025.4-1222 and Abell S295 shows a bimodal mass distribution supporting the merger scenarios proposed for these clusters .
The updated model for MACS J0025.4-1222 suggests a substantially smaller critical area than previously estimated .
For MACS J0159.8-0849 and Abell 697 we find a single peak and relatively regular morphology , revealing fairly relaxed clusters .
Despite being less prominent lenses , three of these clusters seem to have lensing strengths , i.e .
cumulative area above certain magnification , similar to the Hubble Frontier Fields clusters ( e.g. , A ( \mu > 5 ) \sim 1 - 3 arcmin ^ { 2 } , A ( \mu > 10 ) \sim 0.5 - 1.5 arcmin ^ { 2 } ) , which in part can be attributed to their merging configurations .
We make our lens models publicly available through the Mikulski Archive for Space Telescopes .
Finally , using Gemini-N/GMOS spectroscopic observations we detect a single emission line from a high-redshift J _ { 125 } \simeq 25.7 galaxy candidate lensed by Abell 697 .
While we can not rule out a lower-redshift solution , we interpret the line as Ly \alpha at z = 5.800 \pm 0.001 , in agreement with its photometric redshift and dropout nature .
Within this scenario we measure a Ly \alpha rest-frame equivalent width of 52 \pm 22 Å and an observed Gaussian width of 117 \pm 15 km/s .