From planet@astro.rug.nl Tue Jul 11 19:41:14 MET 2000
Subject: PLANET Team Alert for EROS-20000-BUL-05

		---------------------------------------------
		PLANET TEAM ANOMALY ALERT FOR EROS BLG-2000-5
		---------------------------------------------

The PLANET collaboration has been performing intense photometric 
monitoring of the multiple-lens microlensing event EROS BLG-2000-5 
for several weeks. This event was discovered by the EROS team and 
first noted to be anomalous by the MPS team. We reported that 
the event executed a fold caustic about a month ago      
at Heliocentric Julian Date (HJD) = 2,451,705.000 +/- 0.002 
(see earlier PLANET team alert and caustic characterization). 
Since then, we have reported the rise to its second caustic 
crossing, and updated predictions for the timing of the 
end of the second caustic crossing, when the trailing limb 
of the K giant source star exits over the caustic  
(see http://www.astro.rug.nl/~planet/EB2K005.html).
Since the dramatic drop in the apparent brightness of source 
signaling the end of the second crossing, the light curve 
has risen steadily.

Here we report that the degree and curvature of this rise 
suggests that the source is approaching and may soon cross 
a cusp in the caustic structure within the next 48 hours. 
Modeling near a cusp structure is time-consuming; we currently 
have no definite prediction for the timing of the possible cusp 
crossing, but advise intense monitoring of this event.

Event:            EROS-2000-BUL-005
RA (J2000):         17:53:11.5 
Dec (J2000):       -30:55:35

PLANET continues to observe this event. 

Finding charts, previous alert information and updates can be found on the 
PLANET web site at http://www.astro.rug.nl/~planet. 

EROS information on this event can be found at the EROS alert web page at:
http://www-dapnia.cea.fr/Spp/Experiences/EROS/alertes.html. 

	---------------------------------------------