2008A&A...488..271O


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.07CET15:38:06

2008A&A...488..271O - Astronomy and Astrophysics, volume 488, 271-277 (2008/9-2)

Simultaneous absolute timing of the Crab pulsar. at radio and optical wavelengths.

OOSTERBROEK T., COGNARD I., GOLDEN A., VERHOEVE P., MARTIN D.D.E., ERD C., SCHULZ R., STUEWE J.A., STANKOV A. and HO T.

Abstract (from CDS):

The Crab pulsar emits across a large part of the electromagnetic spectrum. Determining the time delay between the emission at different wavelengths will allow to better constrain the site and mechanism of the emission. We have simultaneously observed the Crab Pulsar in the optical with S-Cam, an instrument based on Superconducting Tunneling Junctions (STJs) with µs time resolution and at 2 GHz using the Nancay radio telescope with an instrument doing coherent dedispersion and able to record giant pulses data. We have studied the delay between the radio and optical pulse using simultaneously obtained data therefore reducing possible uncertainties present in previous observations. We determined the arrival times of the (mean) optical and radio pulse and compared them using the tempo2 software package. We present the most accurate value for the optical-radio lag of 255±21µs and suggest the likelihood of a spectral dependence to the excess optical emission asociated with giant radio pulses.

Abstract Copyright:

Journal keyword(s): stars: pulsars: individual: Crab Pulsar, PSR J0534+2200

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* CM Tau Psr 05 34 31.93830 +22 00 52.1758           ~ 4866 1
2 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5705 4
3 PSR J1824-2452A Psr 18 24 32.009 -24 52 11.10           ~ 440 2
4 PSR B1919+21 Psr 19 21 44.815 +21 53 02.25           ~ 353 0

    Equat.    Gal    SGal    Ecl

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2021.03.07-15:38:06

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