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Table 1

Performance of AutoPhOT computing r-band light curves from Fig. 17.

Transient Images Time taken (h) Mean residual (mag) Mean error residual (mag)
AT 2018COW (HOTPANTS) 37 0.5 45 0.002 0.003
AT 2018COW (PYZOGY) 37 0.5 46 0.005 0.005
SN 2018coi 259 4.69 65 0.007 0.021
SN 2016iae 25 0.53 34 0.011 0.040

Notes. Photometry for AT 2018cow was performed using template subtraction and aperture photometry (similar to the Perley et al. 2018, although a custom host subtraction pipeline was used in this case.), whereas SN 2016coi (Prentice et al. 2018a) and 2016iae (Prentice & Mazzali 2017) were reduced without subtraction and both PSF and aperture photometry were used where appropriate. Photometry performed using a 2017 MacBook Pro, using a 2.5 GHz Intel Core i7 processor with 8 Gb DDR3 RAM.

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