Kavli Affiliate: Steven M. Kahn
| First 5 Authors: Yize Dong, Yize Dong, , ,
| Summary:
We present SLIDE, a pipeline that enables transient discovery in data from
the Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST), using
archival images from the Dark Energy Camera (DECam) as templates for difference
imaging. We apply this pipeline to the recently released Data Preview 1 (DP1;
the first public release of Rubin commissioning data) and search for transients
in the resulting difference images. The image subtraction, photometry
extraction, and transient detection are all performed on the Rubin Science
Platform. We demonstrate that SLIDE effectively extracts clean photometry by
circumventing poor or missing LSST templates. We identified 29 previously
unreported transients, 12 of which would not have been detected based on the
DP1 DiaObject catalog. SLIDE will be especially useful for transient analysis
in the early years of LSST, when template coverage will be largely incomplete
or when templates may be contaminated by transients present at the time of
acquisition. We present multiband light curves for a sample of known
transients, along with new transient candidates identified through our search.
Finally, we discuss the prospects of applying this pipeline during the main
LSST survey. Our pipeline is broadly applicable and will support studies of all
transients with slowly evolving phases.
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