NGTS-6b: An ultrashort period hot-jupiter orbiting an Old K dwarf

Based on data collected under the NGTS project at the ESO La Silla Paranal Observatory. The NGTS facility is operated by the consortium institutes with support from the UK Science and Technology Facilities Council (STFC) project ST/M001962/1. This paper includes data collected by the TESS mission. Funding for the TESS mission is provided by the NASA Explorer Program. This paper uses observations madeat the South African Astronomical Observatory (SAAO). PE and AC JIV acknowledges support of CONICYTPFCHA/Doctorado Nacional-21191829, Chile. JSJ acknowledges support by Fondecyt grant 1161218 and partial support by CATA-Basal (PB06, CONICYT). Contributions at the University of Geneva by DB, FB, BC, LM, and SU were carried out within the framework of the National Centre for Competence in Research ”PlanetS” supported by the Swiss National Science Foundation (SNSF). The contributions at the University of Warwick by PJW, RGW, DLP, FF, DA, BTG and TL have been supported by STFC through consolidated grants ST/L000733/1 and ST/P000495/1. The contributions at the University of Leicester by MGW and MRB have been supported by STFC through consolidated grant ST/N000757/1. TL was also supported by STFC studentship 1226157. MNG is supported by the STFC award reference 1490409 as well as the Isaac Newton Studentship. EG gratefully acknowledges support from Winton Philanthropies in the form of a Winton Exoplanet Fellowship. SLC acknolwedges support from an STFC Ernest Rutherford Fellowship. PE, ACh, and HR acknowledge the support of the DFG priority program SPP 1992 ”Exploring the Diversity of Extrasolar Planets” (RA 714/13-1). This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 681601). The research leading to these results has received funding from the European Research Council under the European Union’s Seventh Framework Programme (FP