Radio monitoring of the blasar 3C454.3

ATel #488; Trushkin S. A. ( SAO RAS), Harinov M. A., Michailov A. G. (IAA RAS)
on 12 May 2005; 09:28 UT
Distributed as an Instant Email Notice Request For Observations
Credential Certification: Sergei Trushkin (satr@sao.ru)

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In ATEL #484 R. Remillard annonced about the bright X-ray outburst of the blazar 3C454.3 in May 2005. We have monitored 3C454.3 during the last 6 mounths with the RATAN-600 (SAO RAS) radio telescope in 17 September 2004 and then with RT32 radio telescope (Institute of Applied Astronomy RAS) from December 2004 to April 2005.
The RATAN data (17/09/2004 = MJD53265):

Frequency	Flux	Error
GHz	Jy	Jy
0.61	16.3	1.0
0.98	15.8	0.7
2.3	13.47	0.3
4.8	11.33	0.2
7.7	10.54	0.2
11.2	9.40	0.2
21.7	6.95	0.3
30.0	6.0	0.3

The RT32 data (errors are less 5 %):

Frequency	28-29	09	20-21	09-10	18-19	26	11-12
GHz	Dec04	Jan05	Jan05	Fev05	Feb05	Mar05	Apr05
2.3	-	-	-	-	-	13.03	12.58
8.45	8.97	10.05	10.51	9.81	8.59	10.44	10.20

Thus these radio data just before the X-ray flare of 3C454.3 could be compared with follow-up radio observations. We plan to observe 3C454.3 16-18 May with RT32.
You can see 3C454.3 radio spectrum here .