Methodological refinement of the submillimeter galaxy magnification bias: I. Cosmological analysis with a single redshift bin

L.B., J.G.N., J.M.C. and D.C. acknowledge the PID2021-125630NB-I00 project funded by MCIN/AEI/10.13039/501100011033/FEDER, UE. L.B. also acknowledges the CNS2022-135748 project funded by MCIN/AEI/10.13039/501100011033 and by the EU “NextGenerationEU/PRTR”. J.M.C. also acknowledges financial support from the SV-PA-21-AYUD/2021/51301 project. We deeply acknowledge the CINECA award under the ISCRA initiative, for the availability of high performance computing resources and support. In particular the projects “SIS22_lapi”, “SIS23_lapi” in the framework “Convenzione triennale SISSA-CINECA”. The Herschel-ATLAS is a project with Herschel, which is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA. The H-ATLAS website is http://www.h-atlas.org. GAMA is a joint European Australasian project based around a spectroscopic campaign using the Anglo Australian Telescope. The GAMA input catalogue is based on data taken from the Sloan Digital Sky Survey and the UKIRT Infrared Deep Sky Survey. Complementary imaging of the GAMA regions is being obtained by a number of independent survey programs including GALEX MIS, VST KIDS, VISTA VIKING, WISE, Herschel-ATLAS, GMRT and ASKAP providing UV to radio coverage. GAMA is funded by the STFC (UK), the ARC (Australia), the AAO, and the participating institutions. The GAMA website is: http://www.gama-survey.org. This research has made use of the python packages ipython (Pérez & Granger 2007), matplotlib (Hunter 2007), and Scipy (Jones et al. 2001