[vsnet-alert 8563] PKS 0537-441: rapid optical brightening (from ATEL)

[Taichi Kato]

PKS 0537-441: rapid optical brightening (from ATEL)

PKS0537-441 is located at:

053849.7 -440504 (2000.0) QSO0537-441
053849.5 -440507 (2000.0) IRAS05373-4406 0.269L 0.182 0.489 1.000L -1%
053849.5 -440507 (2000.0) SSC05373-4406 0.269L 0.182 0.489 1.000L
053849.7 -440504 (2000.0) CfA_0537-4406 z=0.894 Bmag=15.5
053849.9 -440512 (2000.0) 1RXPJ053850-4405.2 0.3970 0.39 -0.11
053849.9 -440512 (2000.0) 1WGAJ0538.8-4405 0.3120 1.16 1.60 0.79 0.57 obs=1991.100
053850.1 -440503 (2000.0) 1RXS_J053850.2-440504 0.178 0.34 0.17
053850.2 -440502 (2000.0) 2RXP_J053850.3-440503 0.3566P 0.28 0.24 910410
053850.2 -440508 (2000.0) QSO_PKS0537-441 16.48 z=0.896 HP
053850.9 -440505 (2000.0) FSC05373-4406 0.110 0.220 0.418 0.646
053851.5 -440456 (2000.0) EMSS2 10.00sigma

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The Astronomer's Telegram                   http://www.astronomerstelegram.org 
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Posted: Tue Jul 12 01:30:01 EDT 2005 -- Wed Jul 13 01:30:01 EDT 2005
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ATEL #564							     ATEL #564

Title:		PKS 0537-441: optical monitoring 
Author:		S. Covino (INAF/OAB), E. Pian (INAF/OATs), A. Treves, A.
		Dolcini, E. Molinari, G. Chincarini, F.M. Zerbi, M. Rodono',  V. Testa,
		G. Tosti, F. Vitali, L.A. Antonelli, P. Conconi, G. Cutispoto, L.
		Nicastro, E. Palazzi, E. Meurs, P. Goldoni, on behalf of the REM/ROSS
		Team
Queries:	covino at merate.mi.astro.it
Posted:		12 Jul 2005;  10:33  UT
Subjects:	Optical, Request for Observations, AGN, Transients

The REM 60cm robotic telescope located at La Silla, Chile, has observed
the blazar PKS 0537-441 with the CCD camera and VRI filters on 2005 July
7.35, 9.35, 10.35, 11.35 UT.        A steady and achromatic increase in
flux by almost 1.5 magnitudes is detected. The amplitude of the variation
in such short time scale is remarkable, and if compared to the dramatic
variability observed in December 2004 - March 2005 (Dolcini et al., submitted)
suggests a long-term active state of the source.        We encourage further
monitoring from other telescopes.