MOA 2017-BLG-489

Event Parameters

Internal ID:gb4-R-3-66545
Discovery date:2017-09-29T11:02:41
RA:17:53:22.03
Dec:-30:52:18.69
Current assessment:microlensing
A transient event found by MOA.

Lightcurve

Finder chart

Nearest catalogued stars

starIDRADecmagseparation
139245 17:53:21.83 -30:52:20.82 16.35 ± 0.06 4.26
139269 17:53:21.86 -30:52:18.08 17.35 ± 0.15 2.78
139335 17:53:21.99 -30:52:22.32 18.65 ± 0.23 4.49
139358 17:53:22.04 -30:52:13.44 15.30 ± 0.07 4.83
139378 17:53:22.09 -30:52:16.62 17.28 ± 0.14 1.54
139489 17:53:22.33 -30:52:17.79 17.62 ± 0.09 3.49
139490 17:53:22.32 -30:52:15.11 17.84 ± 0.14 4.54

Last 5 photometry measurements

Observation dateI magseeing
2460572.892 (2024-Sep-19.392) 19.73 ± 0.69 4.04
2460572.932 (2024-Sep-19.432) 21.31 ± 3.11 3.89
2460572.944 (2024-Sep-19.444) 20.81 ± 2.07 3.85
2460572.954 (2024-Sep-19.454) 20.85 ± 1.95 3.58
2460572.966 (2024-Sep-19.466) 16.83 ± 1.30 6.69

Calibration: I = 27.40 - 2.5 log10(ΔF + 0.00)

Single lens fit parameters

tmax =JD 2458026.58 ± 0.00 UT (2017-Sep-30.08)
tE =14.52 ± 0.32 days
u0 =0.0180 ± 0.0008
Ibase =18.61 ± 0.26

External data

Gzipped FITS finder chart

All photometry data

Machine readable VOEvent notice