OGLE-2017-BLG-0831

Tmax	2457886.044	±	0.337	(2017-05-12.54 UT)
tau	15.146	±	0.774
umin	0.402	±	0.026
Amax	2.635	±	0.154
Dmag	1.052	±	0.003
fbl	1.000	±	0.000
Ibl	20.144	±	0.008
I0	20.144	±	0.008

Last Epoch in data: 2458030.48872 (2017-10-03.99 UT)

Click here to download gzipped tar file containing full data set for this event
(including map.dat: O-IV VI map (CMD) or I-band map of the finding chart field).

Go to main EWS page where info on other events can be found.

• Finding chart (available also in FITS format (without cross) and Postscript).
  The image size is 2' x 2', North is up and East is to the left.
  If V-band database is available also the CMD of the finding chart field is displayed.
  
       

• Full span light curve (available also in Postscript format)
  
  

• Event light curve (available also in Postscript format)
  
  

• Photometry data file containing 5 columns: Hel.JD, I magnitude, magnitude error, seeing estimation (in pixels - 0.26"/pixel) and sky level.