NOAO >   Observing Info >   Approved Programs >   2018A-0273

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Program Information for 2018A-0273


PI: William Dawson, Lawrence Livermore National Laboratory, willdawson@llnl.gov
Address: Physics Department, 7000 East Ave, Livermore, CA 94550-9698 United States

CoI: S Mark Ammons, Lawrence Livermore National Laboratory
CoI: Tim Axelrod, U. of Arizona
CoI: George Chapline, Lawrence Livermore National Laboratory
CoI: Agnieszka Cieplak, U. of Maryland
CoI: Alex Drlica-Wagner, FNAL
CoI: Nathan Golovich, Lawrence Livermore National Laboratory
CoI: Jessica Lu, UC Berkeley
CoI: Michael D Schneider, Lawrence Livermore National Laboratory
CoI: Anja von der Linden, SUNY
CoI: Tom Zick, UC Berkeley

Title: PALS: Paralensing Survey of Intermediate Mass Black Holes

Abstract: The discovery of gravitational waves from merging intermediate mass black holes (IMBHs) by LIGO is arguably among the most important scientific discoveries of the 21st century. The current rate of LIGO events favors such a large abundance that IMBHs (- 10^5,mathrm_odot$) would make up the majority of dark matter (DM). We propose a Blanco/DECam microlensing survey to search for similar IMBHs in our Milky Way. This is one of the select projects recommended by the DOE Cosmic Visions: New Ideas in Dark Matter report. While past microlensing surveys have only been efficient below ,mathrm_odot$, we will use paralensing as a means of surpassing this previous limitation. By carefully designing this survey we will enable the detection of these intermediate mass black holes based on their parallax microlensing signal, and thus enable us to be sensitive to black holes in the Milky Way $gtrsim 10,mathrm_odot$. This survey will also open the door to precise mass measurements of individual black holes through follow-up observations of the complementary astrometric microlensing signal.

Program Type: Long Term/Extragalactic

Scheduled Nights:
Run 1 (2018A):  CT-4m/DECam -- 2n on Feb 15 - Feb 16 2018
Run 2 (2018A):  CT-4m/DECam -- 2n on Mar 11 - Mar 12 2018
Run 3 (2018A):  CT-4m/DECam -- 2n on Jul 18 - Jul 19 2018


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NOAO >   Observing Info >   Approved Programs >   2018A-0273

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