Optical Spectrum of MAXI J1727-203 Candidate
ATel #11691; John Thorstensen (Dartmouth)
on 6 Jun 2018; 09:00 UT
Distributed as an Instant Email Notice Transients
Credential Certification: J. R. Thorstensen (john.thorstensen@dartmouth.edu)
Subjects: Optical, X-ray, Transient
I obtained a spectrum of the suggested counterpart of this transient source (ATEL 11690, 11689) with the 2.4m Hiltner telescope and modular spectrograph at MDM Observatory. The spectrum covers from 4350 to 7500 A at about 4 A resolution, and shows no emission or features except for apparently interstellar sodium D lines with a combined equivalent width of about 1.8 A. This is consistent with an X-ray transient. The start time was 8:25 UT on 2018 June 6.
