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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

References

Bertsch, D.L., et al. 1992, Nature, 357, 306 Google Scholar
Caraveo, P.A., Lattanzi, M.G., Massone, G., Mignani, R.P., Makarov, V.V., Perryman, M.A.C., & Bignami, G.F. 1998, A&A, 329, Ll Google Scholar
Cornwell, T.J. & Perley, R.A. 1992, A&A, 261, 353 Google Scholar
Halpern, J.P. & Holt, S.S. 1992, Nature, 357, 222 CrossRefGoogle Scholar
Kassim, N.E. & Lazio, T.J.W. 2000, ApJ, in pressGoogle Scholar
Kuz’min, A.D. & Losovskii, B.Ya. 1997, Astron. Lett., 23, 283 Google Scholar
Malofeev, V.M. & Malov, O.I. 1997, Nature, 389, 697 CrossRefGoogle Scholar
McLaughlin, M.A., Cordes, J.M., Hankins, T.H., & Moffett, D.A. 1999, ApJ, 512, 929 Google Scholar
Ramachandran, R., Deshpande, A.A., & Indrani, C. 1998, A&A, 339, 787 Google Scholar
Shitov, Yu. P. & Pugachev, V.D. 1997, New Astron., 3, 101 Google Scholar
Vats, H.O., Singal, A.K., Deshpande, M.R., Iyer, K.N., Oza, R., Shah, C.R., & Doshi, S. 1999, MNRAS, 302, L65 Google Scholar