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TITLE:           GCN/OGLE NOTICE
NOTICE_DATE:     Mon 28 Aug 17 20:15:45 UT
NOTICE_TYPE:     OGLE Lensing Event
SRC_ID_NUM:      201701639
SRC_RA:          272.3138d {+18h 09m 15s} (J2000),
                 272.5865d {+18h 10m 21s} (current),
                 271.5379d {+18h 06m 09s} (1950)
SRC_DEC:         -25.9399d {-25d 56' 23"} (J2000),
                 -25.9357d {-25d 56' 08"} (current),
                 -25.9493d {-25d 56' 56"} (1950)
DISCOVERY_DATE:  17962 TJD;   209 DOY;   17/07/28 (yy/mm/dd)
DISCOVERY_TIME:  72945 SOD {20:15:45.00} UT
LEAD_TIME:       19.933 [days]
MAX_DATE:        17982 TJD;   229 DOY;   17/08/17 (yy/mm/dd)
MAX_TIME:        67132 SOD {18:38:52.79} UT
MAX_UNCERT:      0.230 [days]
CUSP_WIDTH:      9.33 +/- 0.53 [days]
u0:              0.69 +/- 0.01 [RingUnits]
MAX_MAG:         18.1 mag (estimated)
BASE_MAG:        18.68 +/- 0.00 [mag]
AMPLIFICATION:   1.68 +/- 0.02 factor
LC_URL:          http://www.astrouw.edu.pl/~ogle/ogle4/ews/blg-1639.html
SUN_POSTN:       157.50d {+10h 30m 01s}   +9.42d {+09d 25' 01"}
SUN_DIST:        116.59 [deg]   Sun_angle= -7.7 [hr] (East of Sun)
MOON_POSTN:      239.36d {+15h 57m 26s}  -15.09d {-15d 05' 13"}
MOON_DIST:        32.84 [deg]
GAL_COORDS:        5.22, -3.04 [deg] galactic lon,lat of the burst
ECL_COORDS:      272.08, -2.52 [deg] ecliptic lon,lat of the burst
COMMENTS:        OGLE Gravitational Lensing Event.