SN 2016glz , the SIMBAD biblio

2018ApJS..238...15H - Astrophys. J., Suppl. Ser., 238, 15-15 (2018/October-0)

Sifting for sapphires: systematic selection of tidal disruption events in iPTF.

HUNG T., GEZARI S., CENKO S.B., VAN VELZEN S., BLAGORODNOVA N., YAN L., KULKARNI S.R., LUNNAN R., KUPFER T., LELOUDAS G., KONG A.K.H., NUGENT P.E., FREMLING C., LAHER R.R., MASCI F.J., CAO Y., ROY R. and PETRUSHEVSKA T.

Abstract (from CDS):

We present results from a systematic selection of tidal disruption events (TDEs) in a wide-area (4800 deg2), g+R band, Intermediate Palomar Transient Factory experiment. Our selection targets typical optically selected TDEs: bright (>60% flux increase) and blue transients residing in the centers of red galaxies. Using photometric selection criteria to down-select from a total of 493 nuclear transients to a sample of 26 sources, we then use follow-up UV imaging with the Neil Gehrels Swift Telescope, ground-based optical spectroscopy, and light curve fitting to classify them as 14 Type Ia supernovae (SNe Ia), 9 highly variable active galactic nuclei (AGNs), 2 confirmed TDEs, and 1 potential core-collapse supernova. We find it possible to filter AGNs by employing a more stringent transient color cut (g - r < -0.2 mag); further, UV imaging is the best discriminator for filtering SNe, since SNe Ia can appear as blue, optically, as TDEs in their early phases. However, when UV-optical color is unavailable, higher-precision astrometry can also effectively reduce SNe contamination in the optical. Our most stringent optical photometric selection criteria yields a 4.5:1 contamination rate, allowing for a manageable number of TDE candidates for complete spectroscopic follow-up and real-time classification in the Zwicky Transient Facility era. We measure a TDE per galaxy rate of 1.7–1.3+2.9×10–4gal–1yr–1 (90% CL in Poisson statistics). This does not account for TDEs outside our selection criteria, and thus may not reflect the total TDE population, which is yet to be fully mapped.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): accretion, accretion disks - black hole physics - galaxies: nuclei - surveys - ultraviolet: general

CDS comments: iPTF16ayd, iPTF16bjy, iPTF16bke, iPTF16bko, iPTF16bmy, iPTF16ijw, iPTF16ijz and iPTF16isi are not in SIMBAD.

Simbad objects: 33

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2020.10.31-08:51:38

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