Pulsar Observations - CAMRAS - Dwingeloo Radio Observatory

NOTE: All the information and images presented here are reproduced with permission by Pieter-Tjerk de Boer (PA3FWM).

Background (from the CAMRAS website - October 2008)

CAMRAS volunteers, Pieter-Tjerk de Boer (PA3FWM) and Paul Boven (PE1NUT) used the Dwingeloo Telescope to record pulsar signals from PSR B0329+54, the strongest pulsar that is visible from the Northern hemisphere. The graph below shows the noise power in a 1 MHz wide band as a function of time: the green dots are single (folded) measurements, while the red line shows the averaged power over 705 pulse periods. We are currently working on a more wide-band system with de-dispersion, to make single pulses audible.

Receiving System

Dish 25 meter , mesh screen reflector
Homebrew SDR (PA3FWM)
Data analysis software (PA3FWM)

Home Brew SDR System by PA3FWM

Antenna

The 25 metre mesh dish antenna used at Dwingeloo Radio Observatory to observe pulsars at 1.3 GHz.

 

25 metre Antenna at Dwingeloo Radio Observatory

The Results (October 2008)

The results of detection of B0329+54 (~ 3300 ly) at 1.3 GHz and 440 MHz as given by CAMRAS.


B0329+54




B0329+54 at 1.3 GHz


B0329+54 at 437 MHz and 441 MHz Showing Dispersion Delay

Other Details

Since 2008 things have progressed, mostly the work of Paul (PE1NUT). Paul has built a better receive system and written software for it, with which at least this strongest pulsar can be made audible. That's now a regular demonstration to visitors. Also, a system has been created by which visitors (e.g., school classes) can do the processing steps themselves needed to dig out the pulsar signal (folding etc.).

See the Dwingeloo Radio Observatory site for more general information.