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Trigonometric Parallaxes of 6.7 GHz Methanol Masers
K. L. J. Rygl, A. Brunthaler, M. J. Reid +3
Emission from the 6.7 GHz methanol maser transition is very strong, is relatively stable, has small internal motions, and is observed toward numerous massive star-forming regions i…
The radio lightcurve of SN 2008iz in M82 revealed by Urumqi observations
N. Marchili, I. Marti-Vidal, A. Brunthaler +7
We report on a set of 5 GHz Urumqi observations of the galaxy M82, made between August 2005 and May 2009. From the resulting flux densities, we detect a strong flare, starting in M…
A Trigonometric Parallax of Sgr B2
M. J. Reid, K. M. Menten, X. W. Zheng +2
We have measured the positions of water masers in Sgr B2, a massive star forming region in the Galactic center, relative to an extragalactic radio source with the Very Long Baselin…
Simultaneous Multi-Wavelength Observations of Sgr A* during 2007 April 1-11
F. Yusef-Zadeh, H. Bushouse, M. Wardle +18
We report the detection of variable emission from Sgr A* in almost all wavelength bands (i.e. centimeter, millimeter, submillimeter, near-IR and X-rays) during a multi-wavelength o…
Discovery of a bright radio transient in M82: a new radio supernova?
A. Brunthaler, K. M. Menten, M. J. Reid +3
In this Letter, we report the discovery of a new bright radio transient in M82. Using the Very Large Array, we observed the nuclear region of M82 at several epochs at 22 GHz and de…
Motions of Galaxies in the Local Group and Beyond: an Astro2010 Science White Paper
M. J. Reid, A. Brunthaler, K. M. Menten +2
Recent advances with the VLBA have resulted in ~10 micro-arcsec astrometry for compact sources in external galaxies, and measurement of the proper motion of Local Group galaxies ha…