Pulsar Observations - Andrea (IW5BHY) &  Gabriele (IK5VLS)

NOTE: All images presented here and a large part of the text has been downloaded with permission from this website.

Andrea Dell'Immagine (IW5BHY) and Gabriele Tucci (IK5VLS) have detected B0329+54 using a 4 metre dish @ 1296 MHz.

Background (extracted from the website)

Andrea and I have decided to try the reception of a pulsar star's signal on the frequency of EME band , 1296 MHz.

Andrea's theoretical calculations have showed that it was possible, even if at the limit of the system. We chose the B0329+54 Pulsar.

The pulsar's signal is extremely weak so it is very hard for an amateur station to receive. Reception of the signal isn't listening to the sound , but instead getting a graphic where we can see the pulse shape rising out of the noise.

The pulsar signal is subject to the effects of the ISM and so varies in strength with time.  The signal also has to battle with local interference (QRM).

Receiving System

Dish 4 meter , mesh , IK5VLS.
Elevation/azimuth tracking by F1EHN software.
Axis speed , azimuth 0,3 degrees/sec ( 1 degrees/sec speed velocity )
Axis speed , elevation = 0,4 degrees/sec
Circular dual feeder type N2UO .
Preamplifier gain +30 dB NF 0,17 G4DDK .
Transverter 1296 MHz > 28 MHz Kune Electronics .
Radiometer , IW5BHY
Interface A/D , IW5BHY
10 MHz standard reference from GPS system .
Audio recording , Audacity .
Data analysis software , IW5BHY .
Sky radio observations software , Radio Sky ( www.radiosky.com )
Receiving system solar noise typical 15.5 dB

Antenna

The 4 metre mesh dish antenna used by IW5BHY and IK5VLS to observe pulsars at 23cm.

 

The Results (January 2015)

The results of detection of B0329+54 (~ 3300 ly) are given by IW5BHY and IK5VLS.


B0329+54



Other Details

There is much more detail on IK5VLS's website here. A visit to that link shows a slide show presentation which contains a lot of interesting information.