Original source:

Google Earth Engine code to compute Land Surface Temperature from the Landsat series of satellites.

Author: Sofia Ermida ([email protected]; @ermida_sofia)

This code is free and open. 
By using this code and any data derived with it, 
you agree to cite the following reference 
in any publications derived from them:

Ermida, S.L., Soares, P., Mantas, V., Göttsche, F.-M., Trigo, I.F., 2020. 
    Google Earth Engine open-source code for Land Surface Temperature estimation from the Landsat series.
    Remote Sensing, 12 (9), 1471; https://doi.org/10.3390/rs12091471

trying to modify it so it can work with multiple images from an image collection