Cold gas in the early Universe: Survey for neutral atomic-carbon in GRB host galaxies at 1 < z< 6 from optical afterglow spectroscopy

We also wish to thank the large European GRB collaboration and the dedicated ToO advocates staying on alert at all times, day and night. Without the swift reaction of this team, such a large number of good quality GRB afterglow spectra would never have been gathered. KEH and PJ acknowledge support by a Project Grant (162948–051) from The Icelandic Research Fund. The Cosmic Dawn Center is funded by the DNRF. JK and PN acknowledge funding from the French Agence Nationale de la Recherche under grant no ANR-17-CE31-0011-01. SDV acknowledges the support of the French National Research Agency (ANR) under contract ANR-16-CE31-0003. JJ acknowledges support from NOVA and NWO-FAPESP grant for advanced instrumentation in astronomy.