////////////////////////////////////////////////////////////////////// TITLE: GCN/OGLE NOTICE NOTICE_DATE: Sat 21 Apr 18 21:18:59 UT NOTICE_TYPE: OGLE Lensing Event SRC_ID_NUM: 201800670 SRC_RA: 271.4649d {+18h 05m 52s} (J2000), 271.7501d {+18h 07m 00s} (current), 270.6823d {+18h 02m 44s} (1950) SRC_DEC: -27.0389d {-27d 02' 19"} (J2000), -27.0361d {-27d 02' 09"} (current), -27.0441d {-27d 02' 38"} (1950) DISCOVERY_DATE: 18198 TJD; 80 DOY; 18/03/21 (yy/mm/dd) DISCOVERY_TIME: 76739 SOD {21:18:59.00} UT LEAD_TIME: 43.916 [days] MAX_DATE: 18242 TJD; 124 DOY; 18/05/04 (yy/mm/dd) MAX_TIME: 69465 SOD {19:17:45.60} UT MAX_UNCERT: 5.510 [days] CUSP_WIDTH: 15.75 +/- 2.07 [days] u0: 1.05 +/- 0.21 [RingUnits] MAX_MAG: 17.5 mag (estimated) BASE_MAG: 17.79 +/- 0.00 [mag] AMPLIFICATION: 1.30 +/- 0.13 factor LC_URL: http://www.astrouw.edu.pl/~ogle/ogle4/ews/blg-0670.html SUN_POSTN: 29.56d {+01h 58m 14s} +12.07d {+12d 04' 12"} SUN_DIST: 120.09 [deg] Sun_angle= 7.9 [hr] (West of Sun) MOON_POSTN: 109.50d {+07h 17m 59s} +20.18d {+20d 10' 40"} MOON_DIST: 162.38 [deg] GAL_COORDS: 3.89, -2.90 [deg] galactic lon,lat of the burst ECL_COORDS: 271.31, -3.61 [deg] ecliptic lon,lat of the burst COMMENTS: OGLE Gravitational Lensing Event.