Opacity effects and shock-in-jet modelling of low-level activity in Cygnus X-3 (2008)
Rupen, Michael P., Türler, Marc, Lindfors, Elina J., Blundell, Katherine M., Pooley, Guy G.
We present simultaneous dual-frequency radio observations of Cygnus X-3 during a phase of low-level activity. We constrain the minimum variability timescale to be 20 minutes at 43 GHz and 30 minutes...
An Expanding Shell and Synchrotron Jet in RS Ophiuchi (2007)
Rupen, Michael P., Mioduszewski, Amy J., Sokoloski, Jennifer L.
We report high-resolution radio imaging of the recurrent nova RS Ophiuchi (RS Oph) during the first month of the 2006 outburst, using the Very Long Baseline Array (VLBA). Observations made on days...
McClintock, Jeffrey E., Remillard, Ronald A., Rupen, Michael P., Torres, M. A. P., Steeghs, D., Levine, Alan M., ...
We provide a comprehensive report on the X-ray and radio evolution of H1743-322 during its 2003 outburst. Our X-ray spectral and timing results (3-200 keV) are derived from 170 RXTE observations that...
Star Clusters in M51: Connection between Molecular Gas Stars and Dust (2005)
Schinnerer, Eva, Weiss, Axel, Aalto, Susanne, Scoville, Nicolas Z., Rupen, Michael P., Kennicutt, Robert C., ...
We have mapped key molecular line probes (12CO, 13CO, C18O, HCN, HCO+) in two distinct regions in the spiral arms of the Whirlpool galaxy, M51. Line Velocity Gradient (LVG) analysis performed at a...
A Lack of Radio Emission from Neutron Star Low Mass X-ray Binaries (2004)
Muno, Michael P., Belloni, Tomaso, Dhawan, Vivek, Morgan, Edward H., Remillard, Ronald A., Rupen, Michael P.
We report strict upper limits to the radio luminosities of three neutron star low-mass X-ray binaries obtained with the Very Large Array while they were in hard X-ray states as observed with the...
CI Cam: A Shell-shocked X-ray Nova (2004)
Mioduszewski, Amy J., Rupen, Michael P.
We present radio imaging observations of the 1998 outburst of the peculiar emission line star CI Cam, taken about 1, 4, 75, 82, 93, 163, and 306 days after the beginning of the 31.64 March 1998 X-ray...
Chu, You-Hua, Gruendl, Robert A., Stockdale, Christopher J., Rupen, Michael P., Cowan, John J., Teare, Scott W.
The nature of SN 1961V has been uncertain. Its peculiar optical light curve and slow expansion velocity are similar to those of super-outbursts of luminous blue variables (LBVs), but its nonthermal...
Time-sequenced Multi-Radio-Frequency Observations of Cygnus X-3 in Flare (2003)
Blundell, Katherine M., Rupen, Michael P., Mioduszewski, Amy J., Duffy, Peter, Beasley, Anthony J.
Multifrequency observations from the VLA, VLBA and OVRO Millimeter Array of a major radio outburst of Cygnus X-3 in 2001 September are presented, measuring the evolution of the spectrum of the source...
Chandra Detections of Two Quiescent Black Hole X-Ray Transients (2003)
Tomsick, John A., Corbel, Stephane, Fender, Rob, Miller, Jon M., Orosz, Jerome A., Rupen, Michael P., ...
Using the Chandra X-ray Observatory, we have detected the black hole transients V4641 Sgr and XTE J1859+226 in their low luminosity, quiescent states. The 0.3-8 keV luminosities are...
Simultaneous radio and X-ray observations of the low-mass X-ray binary GX 13+1 (2003)
Homan, Jeroen, Wijnands, Rudy, Rupen, Michael P., Fender, Rob, Hjellming, Robert M., Di Salvo, Tiziana, ...
We present the results of two simultaneous X-ray/radio observations of the low-mass X-ray binary GX 13+1, performed in July/August 1999 with the Rossi X-ray Timing Explorer and the Very Large Array....
The ruff of equatorial emission around the SS433 jets: its spectral index and origin (2002)
Blundell, Katherine M, Rupen, Michael P, Mioduszewski, Amy J, Muxlow, Tom WB, Podsiadlowski, Philipp
We present unique radio observations of SS433, using MERLIN, the VLBA, and the VLA, which allow us to, for the first time, properly image and derive a meaningful spectral index for the `ruff' of...
Post-outburst radio spectral evolution of Cygnus X-3 (2002)
Miller-Jones, James CA, Blundell, Katherine M, Rupen, Michael P, Beasley, Anthony J, Mioduszewski, Amy J
Multifrequency VLA and OVRO observations of the radio outburst of Cygnus X-3 in September 2001 are presented, illustrating the evolution of the spectrum of the source over a period of six days. An...
M. P. Rupen, An H, J. E. Hibbard, Michael P. Rupen, David Schiminovich
We have begun a compilation of H i maps of peculiar galaxies kindly contributed by individual investigators, many as part of the Gas & Galaxy Evolution" conference. In this gallery we present images...
The Fading Radio Emission from SN 1961V: Evidence for a Type II Peculiar Supernova? (2001)
Stockdale, Christopher J., Rupen, Michael P., Cowan, John J., Chu, You-Hua, Jones, Steven S.
Using the Very Large Array (VLA), we have detected radio emission from the site of SN 1961V in the Sc galaxy NGC 1058. With a peak flux density of 0.063 +/- 0.008 mJy/beam at 6 cm and 0.147 +/- 0.026...
A One-sided, Highly Relativistic Jet from Cygnus X-3 (2001)
Mioduszewski, Amy J., Rupen, Michael P., Hjellming, Robert M., Pooley, Guy G., Waltman, Elizabeth B.
Very Long Baseline Array images of the X-ray binary, Cygnus X-3, were obtained 2, 4 and 7 days after the peak of a 10 Jy flare on 4 February 1997. The first two images show a curved one-sided jet,...
Astronomical Requirements for the New VLA Correlator (1999)
The new VLA correlator must be sufficiently powerful and sufficiently flexible to allow the astronomer to use all the new capabilities of the upgraded VLA. Astronomical considerations place stringent...