ZTF22aaajecp/AT2022cmc: GMOS-N spectroscopy

We obtained spectroscopy of ZTF22aaajecp/AT2022cmc (Andreoni et %al., GCN 31590, Perley et al., GCN 31592, Pankov et al. GCN 31593) with the Gemini Multi-Object Spectrographs (GMOS-N) mounted on the Gemini-North 8-meter telescope on Mauna Kea, under our ToO program GN-2022A-Q-127 (PI:Ho). We obtained 2x450 second exposures using the B600 grating and 2x450 second exposures using the R400 grating, starting 2022-02-15 14:35 UTC. After two independent reductions using DRAGONS (Labrie et al. 2019) and Pyraf we report a featureless red continuum. The lack of any narrow or broad lines in our spectral coverage (380nm to 910nm, although the S/N is low blueward of 550 nm) is consistent with a cosmological origin (and suggests an AGN-like or a Galactic origin is unlikely). We thank the observers and the Gemini staff for their rapid response in facilitating this Target of Opportunity observation. -- Tomas Ahumada (he/him) Ph.D. Candidate Department of Astronomy University of Maryland, College Park NASA Goddard Space Flight Center, Code 661 B.Sc. Astronomy, Pontificia Universidad Católica de Chile