Bibcode
Kidger, M.; Sillanpaa, A.; Takalo, L. O.; Pursimo, T.; Lehto, H.; Valtaoja, E.; Nilsson, K.; Terasranta, H.; Tornikoski, M.; de Diego, J. A.; Gonzalez-Perez, J. N.; Guez-Espinosa, J.-M. R.; Mahoney, T.; Boltwood, P.; Dultzin-Hacyan, D.; Benitez, E.; Turner, G. W.; Robertson, J. W.; Honeycut, R. K.; Efimov, Yu. S.; Shakhovskoy, N.; Charles, P. A.; Schramm, K. J.; Borgeest, U.; Linde, J. V.; Sadun, A.; Grashuis, R.; Aller, M. F.; Aller, H. D.; Hughes, P. A.
Bibliographical reference
American Astronomical Society, 185th AAS Meeting, #110.05; Bulletin of the American Astronomical Society, Vol. 26, p.1506
Advertised on:
12
1994
Citations
3
Refereed citations
3
Description
The OJ-94 international collaboration has been observing the light curve
of OJ287 intensely at radio, millimetric, infrared and visible
wavelengths. We present a set of light curves for the 1993/94 observing
season in 14 different bands from 4.8GHz to U. The monitoring covers an
interval from August 1993 to the end of June 1994. The intensity of
light curve monitoring varies considerably in the different bands, from
~ 1400 points in V (an average of 5 per day over the entire observing
season) to a few tens in the least sample bands (1-2 per week). The
visible and infrared light curves are probably the best ever compiled of
an extragalactic object. The visible and near infrared light curves were
extremely active during the observing campaign, with a series of flares
being seen of up to 2 magnitudes amplitude and duration from 1-6 weeks.
During the observing season there was a strongly marked overall trend in
the brightness of OJ287 with the brightness increasing steadily by more
than one magnitude; both flares and faint epochs were superimposed on
this trend. Significant differences are seen in the light curves in
other bands though with very little radio variability being observed and
a light curve amplitude in the infrared significantly lower than that in
the visible. Although the trend to increasing brightness can be seen in
both the infrared and the radio, it is at a very much smaller rate,
especially in the latter. No radio activity is seen coincident with the
optical flares.