iPTF Survey for Cool Transients
Fox, O. D.; Cenko, S. B.; Sollerman, J.; Kulkarni, S. R.; Nugent, P. E.; Amanullah, R.; Goobar, A.; Kasliwal, M. M.; Blagorodnova, N.; Cao, Y.; Cook, D. O.; Fremling, C.; Karamehmetoglu, E.; Taddia, F.; Walters, R.; Adams, S. M.; Laher, R. R.; Bulla, M.; Kupfer, T.; Neill, J. D.; Gezari, S.; Hung, T.; Masci, F. J.; Ho, A. Y. Q.; Miller, A. A.; Ferretti, R.; Barlow, T.; Bue, B.
United States, Sweden
Abstract
We performed a wide-area (2000 deg2) g and I band experiment as part of a two month extension to the Intermediate Palomar Transient Factory. We discovered 36 extragalactic transients including iPTF17lf, a highly reddened local SN Ia, iPTF17bkj, a new member of the rare class of transitional Ibn/IIn supernovae, and iPTF17be, a candidate luminous blue variable outburst. We do not detect any luminous red novae and place an upper limit on their rate. We show that adding a slow-cadence I band component to upcoming surveys such as the Zwicky Transient Facility will improve the photometric selection of cool and dusty transients.