MOA 2020-BLG-257

Event Parameters

Internal ID:gb8-R-7-12758
Discovery date:2020-09-11T11:38:32
RA:18:00:32.04
Dec:-31:24:10.15
Current assessment:microlensing
A transient event found by MOA.

Lightcurve

Finder chart

Nearest catalogued stars

starIDRADecmagseparation
162509 18:00:32.24 -31:24:09.51 18.95 ± 0.18 3.52
162510 18:00:32.23 -31:24:12.61 18.80 ± 0.15 3.66
162603 18:00:32.06 -31:24:11.87 18.98 ± 0.23 1.49
162659 18:00:31.94 -31:24:09.19 19.49 ± 0.30 1.75
162746 18:00:31.76 -31:24:13.06 19.22 ± 0.20 3.98
162763 18:00:31.72 -31:24:09.55 19.44 ± 0.25 3.85

Last 5 photometry measurements

Observation dateI magseeing
2460610.904 (2024-Oct-27.404) 18.59 ± 0.67 4.94
2460610.934 (2024-Oct-27.434) 18.12 ± 0.27 4.61
2460611.879 (2024-Oct-28.379) 18.40 ± 0.22 4.27
2460611.916 (2024-Oct-28.416) 17.36 ± 0.71 5.65
2460614.880 (2024-Oct-31.380) 18.76 ± 0.92 5.09

Calibration: I = 27.40 - 2.5 log10(ΔF + 2333.46)

Single lens fit parameters

tmax =JD 2459105.43 ± 0.13 UT (2020-Sep-12.93)
tE =8.56 ± 1.80 days
u0 =0.0342 ± 0.0107
Ibase =19.03 ± 0.20

External data

Gzipped FITS finder chart

All photometry data

Machine readable VOEvent notice