Extended Data Fig. 4: Images of the localization region of GRB 190114C.
From: Observation of inverse Compton emission from a long γ-ray burst
a, All-sky image captured with the CASANDRA-1 camera at the BOOTES-1 station. The image (30 s exposure, unfiltered) was taken at T0 + 14.8 s, and was severely affected by the moon. At the GRB190114C location (red dot) no prompt optical emission is detected. Inset, magnification (inverted colours) containing a 10′-diametercircle centred on the optical position. b, Three-colour image of the host of GRB 190114C, obtained with the HST. The host galaxy is a spiral galaxy, and the green circle indicates the location of the transient close to its host nucleus. The image is 8″ across; north is up and east is to the left. c–e, Images of the GRB 190114C field taken with the HST, obtained with the F850LP filter (covering roughly the region from 800 to 1,100 nm). Two epochs, 11 February and 12 March 2019, are shown (images are 4″ across); the right-most image is the result of the difference image. A faint transient is visible close to the nucleus of the galaxy, and we identify this as the late-time afterglow of the burst.
