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TITLE:           GCN/OGLE NOTICE
NOTICE_DATE:     Fri 20 Apr 18 12:30:16 UT
NOTICE_TYPE:     OGLE Lensing Event
SRC_ID_NUM:      201800642
SRC_RA:          270.8018d {+18h 03m 12s} (J2000),
                 271.0881d {+18h 04m 21s} (current),
                 270.0159d {+18h 00m 04s} (1950)
SRC_DEC:         -27.5793d {-27d 34' 44"} (J2000),
                 -27.5776d {-27d 34' 38"} (current),
                 -27.5813d {-27d 34' 52"} (1950)
DISCOVERY_DATE:  18197 TJD;    79 DOY;   18/03/20 (yy/mm/dd)
DISCOVERY_TIME:  45016 SOD {12:30:16.00} UT
LEAD_TIME:       32.188 [days]
MAX_DATE:        18229 TJD;   111 DOY;   18/04/21 (yy/mm/dd)
MAX_TIME:        61257 SOD {17:00:57.59} UT
MAX_UNCERT:      0.840 [days]
CUSP_WIDTH:      4.81 +/- 0.55 [days]
u0:              0.47 +/- 0.11 [RingUnits]
MAX_MAG:         18.8 mag (estimated)
BASE_MAG:        19.63 +/- 0.00 [mag]
AMPLIFICATION:   2.26 +/- 0.47 factor
LC_URL:          http://www.astrouw.edu.pl/~ogle/ogle4/ews/blg-0642.html
SUN_POSTN:        28.28d {+01h 53m 07s}  +11.61d {+11d 36' 20"}
SUN_DIST:        119.33 [deg]   Sun_angle= 7.8 [hr] (West of Sun)
MOON_POSTN:       88.74d {+05h 54m 57s}  +19.96d {+19d 57' 21"}
MOON_DIST:       172.08 [deg]
GAL_COORDS:        3.13, -2.65 [deg] galactic lon,lat of the burst
ECL_COORDS:      270.71, -4.14 [deg] ecliptic lon,lat of the burst
COMMENTS:        OGLE Gravitational Lensing Event.