If you ever got to upscale your photo while preserving beautiful detail, the foremost cash-in of the most modern technology within the space provides Gigapixel A.I. is employed by everyone from leading photographers, to computer game modders, to significant motion studios. We discuss our results as demonstration of the survey capability of Pan-STARRS and spectroscopic capability of PESSTO.Due to these exceptional results, Topaz Gigapixel AI. As the final LIGO sky maps changed during analysis, the total probability of the source being spatially coincident with our fields was finally only 4.2 per cent. The number of type Ia SN we find in the survey is similar to that expected from the cosmic SN rate, indicating a reasonably complete efficiency in recovering supernova like transients out to D L = 400 ± 200 Mpc.
For long timescale parameterised lightcurves (with FWHM40d) we set upper limits of M i −17.2 −0.9 +1.4 if the distance to GW150914 is D L = 400 ± 200 Mpc. The Pan-STARRS1 images reach limiting magnitudes of i P1 = 19.2, 20.0 and 20.8 respectively for the three timescales.
We quantify the upper limits by defining param-eterised lightcurves with timescales of 4, 20 and 40 days and use the sensitivity of the Pan-STARRS1 images to set limits on the luminosities of possible sources. We find one high energy type II supernova with an estimated explosion date consistent with that of GW150914, but no causal link can be inferred. All transients appear to be fairly normal supernovae and AGN variability and none is obviously linked with GW150914. Of these, 19 were spectroscopically classified and a further 13 have host galaxy redshifts. We discovered 56 astrophysical transients over a period of 41 days from the discovery of the source.
We we mapped out 442 square degrees of the northern sky region of the initial map. We have searched for an optical counterpart to the first gravitational wave source discovered by the LIGO experiment, GW150914, using a combination of the Pan-STARRS1 wide-field telescope and the PESSTO spectroscopic follow-up programme.
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