NOAO >   Observing Info >   Approved Programs >   2001B-0037

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Program Information for 2001B-0037


PI: Christopher Stubbs, U. of Washington, stubbs@physics.harvard.edu
Address: Box 351580, Seattle, WA 98195-1580 USA

CoI: Kem Cook, Lawrence Livermore National Laboratory
CoI: Suzanne L Hawley, U. of Washington
CoI: Arjen van der Wel, McMaster U.
CoI: Charles Alcock, U. of Pennsylvania
CoI: Kenneth J Mighell, NOAO
CoI: Andrew Becker, Bell Labs, Lucent Technologies
CoI: Cailin Nelson, UC Berkeley
CoI: Andrew J Drake, Lawrence Livermore National Laboratory
CoI: Armin Rest, U. of Washington
CoI: Gajus Miknaitis, U. of Washington
CoI: Stefan Keller, Lawrence Livermore National Laboratory

Title: A Next Generation Microlensing Survey of the LMC

Abstract: One of the foremost outstanding problems in the physical sciences is the nature and distribution of the ``dark matter'' that is the gravitationally dominant component of mass in all galaxies, including the Milky Way. One way to search for astrophysical dark matter objects (often called MAssive Compact Halo Objects, or MACHOs) is to search for the transient brightening of background stars due to the gravitational lensing by foreground MACHOs. A previous experiment has produced a peculiar result: While the detected rate of gravitational lensing events indicates that MACHOs comprise at most perhaps 20\% of the dark matter halo, the number of events far exceeds that expected from known stellar populations. The nature of these excess lensing objects remains a mystery. We intend to determine the nature of this lensing population, which may outweigh all other known components of the Galaxy, by conducting a search with at least a tenfold improvement in the event detection rate. This will be one of the deepest time-domain surveys to date. The survey will have no proprietary data period, and we can draw heavily upon existing tools to provide useful access to the data.

Program Type: Survey

Scheduled Nights:
Run 1 (2001B):  CT-4m/MOSAIC -- 11n on Nov 08 2001, Nov 10 2001, Nov 12 2001, Nov 14 2001, Nov 16 2001, Nov 18 - Nov 19 2001, Nov 21 2001, Nov 23 2001, Dec 10 2001, Dec 12 2001, Dec 14 2001, Dec 16 2001, Dec 18 2001, Dec 20 2001, Jan 04 2002, Jan 06 2002, Jan 08 - Jan 09 2002, Jan 11 2002, Jan 13 2002, Jan 15 2002
Run 1 (2002B):  CT-4m/MOSAIC -- 15n on Sep 27 2002, Sep 29 2002, Oct 01 2002, Oct 03 2002, Oct 05 2002, Oct 07 2002, Oct 09 2002, Oct 11 2002, Oct 13 2002, Oct 29 2002, Oct 31 2002, Nov 02 2002, Nov 04 2002, Nov 06 2002, Nov 08 2002, Nov 10 2002, Nov 12 2002, Nov 14 2002, Nov 27 2002, Nov 29 2002, Dec 01 2002, Dec 03 2002, Dec 05 2002, Dec 07 2002, Dec 09 2002, Dec 11 2002, Dec 13 2002, Dec 15 2002, Dec 28 2002, Jan 02 2003
Run 1 (2003B):  CT-4m/MOSAIC -- 15.5n on Sep 15 2003, Sep 27 2003, Oct 06 2003, Oct 18 - Oct 19 2003, Oct 21 2003, Oct 23 2003, Oct 25 2003, Oct 27 2003, Oct 29 2003, Oct 31 2003, Nov 14 2003, Nov 16 2003, Nov 18 2003, Nov 20 2003, Nov 22 2003, Nov 24 2003, Nov 26 2003, Nov 28 2003, Nov 30 2003, Dec 02 2003, Dec 12 2003, Dec 14 2003, Dec 16 2003, Dec 18 2003, Dec 20 2003, Dec 22 2003, Dec 24 2003, Dec 26 2003, Dec 28 2003, Dec 30 2003
Run 1 (2004B):  CT-4m/MOSAIC -- 15n on Oct 04 2004, Oct 06 2004, Oct 08 2004, Oct 10 2004, Oct 12 2004, Oct 14 2004, Oct 16 2004, Oct 18 2004, Oct 20 2004, Oct 22 2004, Nov 03 2004, Nov 05 2004, Nov 07 2004, Nov 09 2004, Nov 11 2004, Nov 13 2004, Nov 15 2004, Nov 17 2004, Nov 19 2004, Nov 21 2004, Dec 02 2004, Dec 04 2004, Dec 06 2004, Dec 08 2004, Dec 10 2004, Dec 12 2004, Dec 14 2004, Dec 16 2004, Dec 18 2004, Dec 20 2004
Run 1 (2005B):  CT-4m/MOSAIC -- 15n on Sep 23 2005, Sep 25 2005, Sep 27 2005, Sep 29 2005, Oct 01 2005, Oct 03 2005, Oct 05 2005, Oct 08 2005, Oct 10 2005, Oct 24 2005, Oct 26 2005, Oct 28 2005, Oct 30 2005, Nov 01 2005, Nov 03 2005, Nov 05 2005, Nov 07 2005, Nov 09 2005, Nov 21 2005, Nov 23 2005, Nov 25 2005, Nov 27 2005, Nov 29 2005, Dec 01 2005, Dec 03 2005, Dec 07 2005, Dec 09 2005, Dec 23 2005, Dec 28 2005, Jan 02 2006


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