Unpulsed optical emission from the Crab pulsar

A. Golden, A. Shearer, G. M. Beskin

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Based on observations of the Crab pulsar using the TRIFFID high-speed imaging photometer in the UBV bands using the Special Astrophysical Observatory's 6 m telescope in the Russian Caucasus, we report the detection of pronounced emission during the so-called off phase of emission. Following de-extinction, this unpulsed component of emission is shown to be consistent with a power law with an exponent of α = -0.60 ± 0.37, the uncertainty being dominated by the error associated with the inde-pendent CCD photometry used to reference the TRIFFID data. This suggests a steeper power-law form than that reported elsewhere in the literature for the total integrated spectrum, which is essentially flat with α ∼ 0.1, although the difference in this case is only significant at the ≤2 σ level. Deeper reference integrated and TRIFFID phase-resolved photometry, in these bands in conjunction with further observations in the UV and R region, would constrain this fit further.

Original languageEnglish (US)
Pages (from-to)373-378
Number of pages6
JournalAstrophysical Journal
Volume535
Issue number1 PART 1
StatePublished - May 20 2000
Externally publishedYes

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crabs
pulsars
light emission
crab
photometry
power law
photometer
photometers
charge coupled devices
observatories
astrophysics
extinction
observatory
high speed
exponents
telescopes

Keywords

  • Instrumentation: detectors

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Golden, A., Shearer, A., & Beskin, G. M. (2000). Unpulsed optical emission from the Crab pulsar. Astrophysical Journal, 535(1 PART 1), 373-378.

Unpulsed optical emission from the Crab pulsar. / Golden, A.; Shearer, A.; Beskin, G. M.

In: Astrophysical Journal, Vol. 535, No. 1 PART 1, 20.05.2000, p. 373-378.

Research output: Contribution to journalArticle

Golden, A, Shearer, A & Beskin, GM 2000, 'Unpulsed optical emission from the Crab pulsar', Astrophysical Journal, vol. 535, no. 1 PART 1, pp. 373-378.
Golden A, Shearer A, Beskin GM. Unpulsed optical emission from the Crab pulsar. Astrophysical Journal. 2000 May 20;535(1 PART 1):373-378.
Golden, A. ; Shearer, A. ; Beskin, G. M. / Unpulsed optical emission from the Crab pulsar. In: Astrophysical Journal. 2000 ; Vol. 535, No. 1 PART 1. pp. 373-378.
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