Imaging an Event Horizon: submm-VLBI of a Super Massive Black Hole (2009)
Doeleman, Sheperd, Agol, Eric, Backer, Don, Baganoff, Fred, Bower, Geoffrey C., Broderick, Avery, ...
A long standing goal in astrophysics is to directly observe the immediate environment of a black hole with angular resolution comparable to the event horizon. Realizing this goal would open a new...
Digital Instrumentation for the Radio Astronomy Community (2009)
Parsons, Aaron, Werthimer, Dan, Backer, Donald, Bastian, Tim, Bower, Geoffrey, Brisken, Walter, ...
Time-to-science is an important figure of merit for digital instrumentation serving the astronomical community. A digital signal processing (DSP) community is forming that uses shared hardware...
A Scalable Correlator Architecture Based on Modular FPGA Hardware and Data Packetization (2009)
Aaron Parsons, Donald Backer, Henry Chen, Pierre Droz, Terry Filiba, David Macmahon, ...
A new generation of radio telescopes is achieving unprecedented levels of sensitivity and resolution, as well as increased agility and field-of-view, by employing highperformance digital signal...
Parsons, Aaron, Backer, Donald, Chen, Henry, Droz, Pierre, Filiba, Terry, Manley, Jason, ...
A new generation of radio telescopes is achieving unprecedented levels of sensitivity and resolution, as well as increased agility and field-of-view, by employing high-performance digital signal...
VLBA Imaging at 7 mm and Linear Polarimetric Observations at 6 cm and 3 mm of Sgr A* (2008)
Geoffrey C. Bower, Heino Falcke, Don Backer, Melvyn Wright
. We summarize the results of 7 mm VLBA imaging of Sgr A* and discuss some of the difficulties of accurately constraining the size of Sgr A* with VLBI observations. Our imaging results are fully...
BIMA Memo 52 3 mm VLBI at Hat Creek 1995 - 1997 (2007)
Geoffrey Bower Donald, Donald C. Backer, Dick Plambeck, Melvyn Wright
This memo describes the current approach for using the Hat Creek array as an element in a VLBI array. Theoretical and practical questions are addressed. The principal elements of a VLBI station are...
Atmospheric Phase Correction using Water Vapor Radiometers (2007)
We discuss the calibration and use of water vapor radiometers used for atmospheric phase correction on the BIMA array. Over intervals of a few minutes the WVR corrected data are consistent with the...
Petaop/second FPGA signal processing for SETI and radio astronomy (2006)
Aaron Parsons, Donald Backer, Chen Chang, Daniel Chapman, Henry Chen, Patrick Crescini, ...
speed the development of radio astronomy signal processing instrumentation by designing and demonstrating a scalable, upgradeable, FPGA-based computing platform and software design methodology that...
Petaop/second FPGA signal processing for SETI and radio astronomy (2006)
Aaron Parsons, Donald Backer, Chen Chang, Daniel Chapman, Henry Chen, Patrick Crescini, ...
speed the development of radio astronomy signal processing instrumentation by designing and demonstrating a scalable, upgradeable, FPGA-based computing platform and software design methodology that...
De Breuck, Carlos, Neri, Roberto, Morganti, Raffaella, Omont, Alain, Rocca-Volmerange, Brigitte, Stern, Daniel, ...
We present results of a comprehensive multi-frequency study of the radio galaxy B3 J2330+3927. The 1.9\" wide radio source, consisting of 3 components, is bracketed by 2 objects in our Keck K-band...
In this memo, we explore the imaging requirements and data processing options for the large N SKA. We discuss imaging from the sampled cross correlation function and direct imaging by beam formation....
De Breuck, Carlos, Neri, Roberto, Morganti, Raffaella, Omont, Alain, Rocca-Volmerange, Brigitte, Stern, Daniel, ...
We present results of a comprehensive multi-frequency study of the radio galaxy B3 J2330+3927. The 1.9" wide radio source, consisting of 3 components, is bracketed by 2 objects in our Keck K-band...
De Breuck, Carlos, Neri, Roberto, Morganti, Raffaella, Omont, Alain, Rocca-Volmerange, Brigitte, Stern, Daniel, ...
We present results of a comprehensive multi-frequency study of the radio galaxy B3 J2330+3927. The 1.9\" wide radio source, consisting of 3 components, is bracketed by 2 objects in our Keck K-band...
De Breuck, Carlos, Neri, Roberto, Morganti, Raffaella, Omont, Alain, Rocca-Volmerange, Brigitte, Stern, Daniel, ...
We present results of a comprehensive multi-frequency study of the radio galaxy B3 J2330+3927. The 1.9\" wide radio source, consisting of 3 components, is bracketed by 2 objects in our Keck K-band...
The Supernova Remnant Cas A at Millimeter Wavelengths (1999)
Wright, Melvyn, Dickel, John, Koralesky, Barron, Rudnick, Lawrence
We used the BIMA array to map the supernova remnant Cas A from 28 to 87 GHz with 2'' to 7'' angular resolution. Data from 75 to 87 GHz, with 19 pointing centers were combined with single dish data to...
VLBA Imaging at 7 mm and Linear Polarimetric Observations at 6 cm and 3 mm of Sagittarius A* (1998)
Bower, Geoffrey C., Falcke, Heino, Backer, Don, Wright, Melvyn
We summarize the results of 7 mm VLBA imaging of Sgr A* and discuss some of the difficulties of accurately constraining the size of Sgr A* with VLBI observations. Our imaging results are fully...