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  1. K–12 schools across the United States have been challenged to make programmatic shifts to meet the needs of youth and their families during the COVID-19 pandemic. Due to both structure and existing connections to youth and families, many out-of-school learning (OSL) programs, including Pre-College STEM Programs (PCSPs), are nimbler and have the ability to be more responsive. The STEM PUSH Network (a National Science Foundation INCLUDES Alliance; https://stempushnetwork.org)—which brings together PCSPs as part of a national collaborative of programs and citywide STEM Ecosystems focused on program improvement and college admissions—revealed some of the ways programs have adjusted during COVID- 19,more »as well as the ways systematic cross-program collaboration can enhance this work.« less
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  8. Abstract We search for gravitational-wave signals associated with gamma-ray bursts (GRBs) detected by the Fermi and Swift satellites during the second half of the third observing run of Advanced LIGO and Advanced Virgo (2019 November 1 15:00 UTC–2020 March 27 17:00 UTC). We conduct two independent searches: a generic gravitational-wave transients search to analyze 86 GRBs and an analysis to target binary mergers with at least one neutron star as short GRB progenitors for 17 events. We find no significant evidence for gravitational-wave signals associated with any of these GRBs. A weighted binomial test of the combined results finds nomore »evidence for subthreshold gravitational-wave signals associated with this GRB ensemble either. We use several source types and signal morphologies during the searches, resulting in lower bounds on the estimated distance to each GRB. Finally, we constrain the population of low-luminosity short GRBs using results from the first to the third observing runs of Advanced LIGO and Advanced Virgo. The resulting population is in accordance with the local binary neutron star merger rate.« less
    Free, publicly-accessible full text available April 1, 2023