TITLE:   GCN CIRCULAR
NUMBER:  20553
SUBJECT: LIGO/Virgo G268556: FLOYDS Spectrum of iPTF17cf/PS17fr Favors an AGN Classification
DATE:    17/01/28 00:45:29 GMT
FROM:    Griffin Hosseinzadeh at LCOGT  <griffin@lco.global>

G. Hosseinzadeh, I. Arcavi, D. A. Howell, C. McCully (Las Cumbres
Obs./UCSB), and S. Valenti (UC Davis) report a spectrum of EM candidate
iPTF17cf/PS17fr (GCN 20398 & 20410) associated with gravitational wave
event G268556 (GCN 20364) obtained 2017 January 27.3 UT with the robotic
FLOYDS instrument mounted on the Las Cumbres Observatory 2-meter telescope
on Haleakala, Hawai'i. The spectrum shows broad H-alpha and H-beta emission
and possible narrow [O III] emission at redshift z~0.19, suggesting an AGN
classification (c.f. GCN 20459).