Pulsar observations with the Northern Cross

Details Pulsar observations with the Northern Cross Pulsar observations with the Northern Cross

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ncimc..13..505b&link_type=abstract

Nuovo Cimento C, Serie 1 (ISSN 0390-5551), vol. 13 C, Mar.-Apr. 1990, p. 505-516. Research supported by CNR and MPI.

Astronomy and Astrophysics

Astronomy

1

Pulsars, Radio Astronomy, Space Observations (From Earth), Block Diagrams, Radio Telescopes

Scientific paper

The design and operation of the Italian Northern Cross radio telescope are described, and preliminary results from observations of pulsars are reported. The telescope comprises a 635-m-long N-S arm of 64 24-m-long parabolic cylindrical antennas with effective gain 1 K/Jy and system noise temperature 400 K and a 572-m-long E-W arm of 1536 dipoles connected in a 'X-mas-tree' configuration to form six antenna sections with six independent RF and IF channels; the gain of the E-W arm is 2 K/Jy, and efforts are underway to reduce the system noise temperature of 430 K to about 140 K by the use of 12 GaAs FET preamplifiers. Current operation is at 408 MHz with bandwidth about 2.8 MHz. The computer-controlled pulsar observing system is characterized and illustrated with diagrams, and pulsar profiles obtained with the E-W arm are presented graphically.

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