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GCN Circular 21791

Subject
Swift Trigger 770431 (GRB 170902A) is a not a GRB
Date
2017-09-03T04:23:55Z (8 years ago)
From
Jamie A. Kennea at PSU/Swift-XRT <kennea@swift.psu.edu>
J. A. Kennea (PSU) and C. B. Markwardt (NASA/GSFC) report on behalf of the
Swift team:

Swift trigger 770431 (AKA GRB 170902A) is not a GRB, but a Galactic
Transient. The source was detected almost 4 hours after BAT triggered by
MAXI (Negoro et al. ATEL #10699) and the Swift X-ray light-curve measured
after the BAT trigger shows no evidence of fading (Kennea et al., ATEL
#10700). Therefore we conclude that this trigger is in fact from a new
Galactic Transient named MAXI J1535-571.
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