Pulsar detection success

I got word from Lamar Owen this evening that PARI were successful in
using my gnuradio-based pulsar monitor
software along with the excellent USRP + TV_RX hardware to detect and
monitor the pulsar B0950+08, which
has a pulse rate of 3.95Hz. I can’t be sure from the trace, but I
think they detected the much-weaker inter-pulse
as well.

On Monday 25 September 2006 00:45, Marcus L. wrote:

I got word from Lamar Owen this evening that PARI were successful in
using my gnuradio-based pulsar monitor
software along with the excellent USRP + TV_RX hardware to detect and
monitor the pulsar B0950+08, which
has a pulse rate of 3.95Hz. I can’t be sure from the trace, but I
think they detected the much-weaker inter-pulse
as well.

I’ll post some captures of the screen… hmm, if the list will take
attachments, here are the clearest traces… All are of B0950+08, one
of the
brightest pulsars in the sky, and one with a low dispersion measure.

The receive antenna was PARI’s East 26 meter radio telescope (see the
PARI
website for pictures and such) with a cross-dipole-in-a-bucket standard
feed
at the prime focus, centered on 327MHz. The coax run from the dipole to
the
first LNA is about three feet; the first LNA is an Angle Linear unit,
driving
a second broadband Minicircuits amp. This drives the 400+ foot RG214
cable
run down to the control room, where it is a straight patch through a
lightning arrestor panel to the TVRX input.

PC is a Dell PowerEdge 2850 dual Xeon 3.0GHz; CPU utilization at 2MHz
bandwidth is around 60% of one CPU.

Time to go to bed…

Lamar Owen
Director of Information Technology
Pisgah Astronomical Research Institute
1 PARI Drive
Rosman, NC 28772
(828)862-5554
www.pari.edu

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