MOA 2018-BLG-257

Event Parameters

Internal ID:gb4-R-9-72301
Discovery date:2018-07-17T14:29:58
RA:17:55:57.63
Dec:-30:31:45.20
Current assessment:microlensing
A transient event found by MOA.

Lightcurve

Finder chart

Nearest catalogued stars

starIDRADecmagseparation
21466 17:55:57.86 -30:31:46.99 16.69 ± 0.04 3.90
21572 17:55:57.60 -30:31:42.37 16.06 ± 0.14 3.57
21591 17:55:57.54 -30:31:46.34 17.71 ± 0.11 0.79
21651 17:55:57.34 -30:31:44.73 16.08 ± 0.05 3.45

Last 5 photometry measurements

Observation dateI magseeing
2460599.915 (2024-Oct-16.415) 17.74 ± 0.11 2.60
2460599.926 (2024-Oct-16.426) 17.84 ± 0.11 3.44
2460599.938 (2024-Oct-16.438) 17.93 ± 0.14 3.15
2460599.948 (2024-Oct-16.448) 17.84 ± 0.13 3.14
2460599.959 (2024-Oct-16.459) 18.00 ± 0.17 3.45

Calibration: I = 27.40 - 2.5 log10(ΔF + 7530.09)

Single lens fit parameters

tmax =JD 2458321.27 ± 0.04 UT (2018-Jul-21.77)
tE =1.59 ± 0.01 days
u0 =6.4134 ± 0.0543
Ibase =9.99 ± 0.16

External data

Gzipped FITS finder chart

All photometry data

Machine readable VOEvent notice