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TITLE:           GCN/OGLE NOTICE
NOTICE_DATE:     Fri 20 Apr 18 12:30:06 UT
NOTICE_TYPE:     OGLE Lensing Event
SRC_ID_NUM:      201800637
SRC_RA:          268.7257d {+17h 54m 54s} (J2000),
                 269.0136d {+17h 56m 03s} (current),
                 267.9355d {+17h 51m 45s} (1950)
SRC_DEC:         -28.2836d {-28d 17' 00"} (J2000),
                 -28.2856d {-28d 17' 07"} (current),
                 -28.2755d {-28d 16' 31"} (1950)
DISCOVERY_DATE:  18197 TJD;    79 DOY;   18/03/20 (yy/mm/dd)
DISCOVERY_TIME:  45006 SOD {12:30:06.00} UT
LEAD_TIME:       30.478 [days]
MAX_DATE:        18227 TJD;   109 DOY;   18/04/19 (yy/mm/dd)
MAX_TIME:        86313 SOD {23:58:33.59} UT
MAX_UNCERT:      0.380 [days]
CUSP_WIDTH:      3.24 +/- 0.58 [days]
u0:              0.35 +/- 0.02 [RingUnits]
MAX_MAG:         19.4 mag (estimated)
BASE_MAG:        20.54 +/- 0.00 [mag]
AMPLIFICATION:   2.95 +/- 0.14 factor
LC_URL:          http://www.astrouw.edu.pl/~ogle/ogle4/ews/blg-0637.html
SUN_POSTN:        28.28d {+01h 53m 07s}  +11.61d {+11d 36' 20"}
SUN_DIST:        121.13 [deg]   Sun_angle= 8.0 [hr] (West of Sun)
MOON_POSTN:       88.73d {+05h 54m 56s}  +19.96d {+19d 57' 21"}
MOON_DIST:       171.67 [deg]
GAL_COORDS:        1.61, -1.41 [deg] galactic lon,lat of the burst
ECL_COORDS:      268.87, -4.85 [deg] ecliptic lon,lat of the burst
COMMENTS:        OGLE Gravitational Lensing Event.