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Table 7

Precursor candidates identified in this study.

Galaxy RA (deg) Dec (deg) mF814W (mag) Name Sep. (″) Slope (mag/day)
M31 11.04581 41.55485 17.8 ZTF18acbyccy 0.10 −0.00037
M31 10.50249 41.14673 18.7 ZTF20abhtvor 0.01 −0.00043
M33 23.54798 30.55345 17.7 ZTF20acgebak 0.03 −0.00046
M101 210.70334 54.29897 20.8 ZTF18aajytjy 0.32 −0.00037
M101 210.75242 54.35229 23.2 ZTF23aaazair 0.22 −0.00036
M101 210.61563 54.32963 21.0 ZTF24aalfiak 0.33 −0.00031
NGC 55 3.74938 −39.20321 18.7 MLT15613547 0.05 −0.00022
NGC 253 11.97423 −25.20828 19.5 MLT17180523 0.28 −0.00053
NGC 300 13.73000 −37.60991 23.0 MLT28037995 0.32 −0.00083
NGC 1560 68.21523 71.87764 18.6 ZTF21abxynux 0.19 −0.00054
NGC 6503 267.32443 70.15759 21.6 ZTF20abbetli 0.17 −0.00037
UGC 9240 216.18222 44.52105 19.0 ZTF20aaweabf 0.11 −0.00073

Notes. Precursor candidates (sorted by galaxy name) identified in ZTF, MeerLICHT, or BlackGEM. The last column gives the slope of the bestfit linear trend to the ATLAS light curve.

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