TY - JOUR
T1 - Optical Rebrightening of Extragalactic Transients from the Zwicky Transient Facility
AU - Soraisam, Monika
AU - Matheson, Thomas
AU - Lee, Chien Hsiu
AU - Saha, Abhijit
AU - Narayan, Gautham
AU - Wolf, Nicholas
AU - Scott, Adam
AU - Figuereo, Stephanie
AU - Nuñez, Rafael
AU - McKinnon, Kevin
AU - Guhathakurta, Puragra
AU - Brink, Thomas G.
AU - Filippenko, Alexei V.
AU - Smith, Nathan
N1 - Publisher Copyright:
© 2022. The Author(s). Published by the American Astronomical Society.
PY - 2022/2/1
Y1 - 2022/2/1
N2 - Ongoing large-scale optical time-domain surveys, such as the Zwicky Transient Facility (ZTF), are producing alerts at unprecedented rates. Analysis of transient sources has so far followed two distinct paths: archival analysis of data on transient sources at a time when they are no longer observable and real-time analysis at the time when the sources are first detected. The latter is the realm of alert brokers such as the Arizona-NOIRLab Temporal Analysis and Response to Events System (ANTARES). In this paper, we synthesize the two analysis paths and present a first systematic study of archival alert-broker data, focusing on extragalactic transients with multipeaked light curves identified in the ANTARES archive of ZTF alerts. Our analysis yields a sample of 37 such sources, including core-collapse supernovae (with two analogs of iPTF14hls), thermonuclear supernovae interacting with their surrounding circumstellar medium, tidal disruption events, luminous blue variables, and as yet unclassified objects. A large fraction of the identified sources is currently active, warranting allocation of follow-up resources in the immediate future to further constrain their nature and the physical processes at work.
AB - Ongoing large-scale optical time-domain surveys, such as the Zwicky Transient Facility (ZTF), are producing alerts at unprecedented rates. Analysis of transient sources has so far followed two distinct paths: archival analysis of data on transient sources at a time when they are no longer observable and real-time analysis at the time when the sources are first detected. The latter is the realm of alert brokers such as the Arizona-NOIRLab Temporal Analysis and Response to Events System (ANTARES). In this paper, we synthesize the two analysis paths and present a first systematic study of archival alert-broker data, focusing on extragalactic transients with multipeaked light curves identified in the ANTARES archive of ZTF alerts. Our analysis yields a sample of 37 such sources, including core-collapse supernovae (with two analogs of iPTF14hls), thermonuclear supernovae interacting with their surrounding circumstellar medium, tidal disruption events, luminous blue variables, and as yet unclassified objects. A large fraction of the identified sources is currently active, warranting allocation of follow-up resources in the immediate future to further constrain their nature and the physical processes at work.
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U2 - 10.3847/2041-8213/ac4e99
DO - 10.3847/2041-8213/ac4e99
M3 - Article
AN - SCOPUS:85125747700
SN - 2041-8205
VL - 926
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 2
M1 - L11
ER -