MASIV:The Microarcsecond Scintillation-Induced Variability Survey

Thumbnail Image

Files

0701601.pdf (239.97 KB)

Links to Files

http://www.aspbooks.org/a/volumes/table_of_contents/?book_id=78

Permanent Link

http://hdl.handle.net/11603/17523

Collections

UMBC Physics Department
UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)

Author/Creator

Author/Creator ORCID

Date

2007-01-21

Type of Work

conference papers and proceedings preprints
Text

Department

Program

Citation of Original Publication

Lovell, J.E.J.; Jauncey, D.L.; Senkbeil, C.; Shabala, S.; Bignall, H.E.; Pursimo, T.; Ojha, R.; Macquart, J.-P.; Rickett, B.J.; Dutka, M.; Kedziora-Chudczer, L.; MASIV:The Microarcsecond Scintillation-Induced Variability Survey; ASP Conference Series vol. 365 (2007); http://www.aspbooks.org/a/volumes/table_of_contents/?book_id=78

Rights

This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.

Subjects

Abstract

We are undertaking a large-scale 5 GHz VLA survey of the northern sky to search for rapid intra-day variability (IDV). Over four observing epochs we found that 56% of the sources showed variability on timescales of hours to several days. Fewer variables were seen at high galactic latitudes, supporting interstellar-scintillation as the principal mechanism responsible for IDV. We find evidence that many of the scattering screens are not moving with the local standard of rest. There are few scintillating sources seen at high redshift which may be an indication of scattering in the turbulent intergalactic medium.