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A VLA Search for the Geminga Pulsar at 74 and 326 MHz

Published online by Cambridge University Press:  12 April 2016

Namir E. Kassim ,
T. Joseph  and
W. Lazio
Namir E. Kassim
Affiliation:
Naval Research Laboratory, Code 7213, Washington, DC 20375-5351, USA
T. Joseph
Affiliation:
Naval Research Laboratory, Code 7213, Washington, DC 20375-5351, USA
W. Lazio
Affiliation:
Naval Research Laboratory, Code 7213, Washington, DC 20375-5351, USA

Abstract

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We have used the VLA to image the location of the gamma-ray pulsar Geminga at 74 and 326 MHz. Upper limits to the pulse-averaged flux density, taking diffractive scintillation (DISS) into account, are S < 56 mJy (2σ; DISS quenched) at 74 MHz and S < 5 mJy (95% confidence) at 326 MHz. Intrinsic variability appears to be required in order to reconcile our upper limits with previous low-frequency detections.

Type
Part 3. Studies of Radio Emission
Information
International Astronomical Union Colloquium , Volume 177: Pulsar Astronomy - 2000 and Beyond , 2000 , pp. 239 - 240
Copyright
Copyright © Astronomical Society of the Pacific 2000

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