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- W2085398410 abstract "We have begun a program to search for supernovae and other transients in the fields of galaxy clusters with the 2.3 m Bok Telescope on Kitt Peak. We present our automated photometric methods for data reduction, efficiency characterization, and initial spectroscopy. With this program, we aim to ultimately identify ∼25–35 cluster Type Ia supernovae (SNe Ia) (∼10 of which will be intracluster, hostless events) and constrain the SN Ia rate associated with old, passive stellar populations. With these measurements we will constrain the relative contribution of hostless and hosted SNe Ia to the metal enrichment of the intracluster medium. In the current work, we have identified a central excess of transient events within 1.25r200 in our cluster fields after statistically subtracting out the background transient rate taken from an off-cluster CCD chip. Based on the published rate of SNe Ia for cluster populations we estimate that ∼20% of the excess cluster transients are due to cluster SNe Ia, a comparable fraction to core collapse (CC) supernovae and the remaining are likely to be active galactic nuclei. Interestingly, we have identified three intracluster SN candidates, all of which lay beyond R > r200. These events, if truly associated with the cluster, indicate a large deficit of intracluster (IC) SNe at smaller radii, and may be associated with the IC stars of infalling groups or indicate that the intracluster light (ICL) in the cluster outskirts is actively forming stars which contribute CC SNe or prompt SNe Ia." @default.
- W2085398410 created "2016-06-24" @default.
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- W2085398410 date "2008-04-11" @default.
- W2085398410 modified "2023-09-26" @default.
- W2085398410 title "A PHOTOMETRIC SEARCH FOR TRANSIENTS IN GALAXY CLUSTERS" @default.
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- W2085398410 doi "https://doi.org/10.1088/0004-6256/135/5/1917" @default.
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