Catarina Alves (a student of AstroCamp 2014 and camp monitor in 2015 and 2016) and Tomás Silva (a student of AstroCamp 2014 and camp monitor in 2015) are the leading authors of an article which has just been published in Physics Letters B. Another author, Ana Catarina Leite, was also an AstroCamp monitor in 2012, 2013 and 2015.