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TITLE:           GCN/OGLE NOTICE
NOTICE_DATE:     Mon 21 May 18 19:13:07 UT
NOTICE_TYPE:     OGLE Lensing Event
SRC_ID_NUM:      201800870
SRC_RA:          273.4564d {+18h 13m 50s} (J2000),
                 273.7446d {+18h 14m 59s} (current),
                 272.6691d {+18h 10m 41s} (1950)
SRC_DEC:         -27.8238d {-27d 49' 25"} (J2000),
                 -27.8174d {-27d 49' 02"} (current),
                 -27.8387d {-27d 50' 18"} (1950)
DISCOVERY_DATE:  18229 TJD;   111 DOY;   18/04/21 (yy/mm/dd)
DISCOVERY_TIME:  69187 SOD {19:13:07.00} UT
LEAD_TIME:       26.074 [days]
MAX_DATE:        18255 TJD;   137 DOY;   18/05/17 (yy/mm/dd)
MAX_TIME:        75600 SOD {21:00:00.00} UT
MAX_UNCERT:      0.680 [days]
CUSP_WIDTH:      13.72 +/- 1.19 [days]
u0:              0.81 +/- 0.01 [RingUnits]
MAX_MAG:         18.3 mag (estimated)
BASE_MAG:        18.74 +/- 0.00 [mag]
AMPLIFICATION:   1.51 +/- 0.01 factor
LC_URL:          http://www.astrouw.edu.pl/~ogle/ogle4/ews/blg-0870.html
SUN_POSTN:        58.53d {+03h 54m 08s}  +20.29d {+20d 17' 30"}
SUN_DIST:        147.10 [deg]   Sun_angle= 9.7 [hr] (West of Sun)
MOON_POSTN:      148.79d {+09h 55m 10s}  +14.21d {+14d 12' 26"}
MOON_DIST:       127.28 [deg]
GAL_COORDS:        4.05, -4.83 [deg] galactic lon,lat of the burst
ECL_COORDS:      273.07, -4.42 [deg] ecliptic lon,lat of the burst
COMMENTS:        OGLE Gravitational Lensing Event.