MOA 2017-BLG-257

Event Parameters

Internal ID:gb3-R-8-18805
Discovery date:2017-05-14T12:13:39
RA:17:56:05.78
Dec:-32:48:03.66
Current assessment:microlensing
A transient event found by MOA. Possible binary event.

Lightcurve

Finder chart

Nearest catalogued stars

starIDRADecmagseparation
122142 17:56:06.00 -32:48:05.26 15.83 ± 0.03 3.58
122221 17:56:05.81 -32:48:00.69 19.06 ± 0.19 3.82
122334 17:56:05.59 -32:48:06.63 19.21 ± 0.17 3.07
122363 17:56:05.55 -32:48:00.81 15.01 ± 0.03 4.30

Last 5 photometry measurements

Observation dateI magseeing
2460518.892 (2024-Jul-27.392) 99.99 ± 99.99 2.75
2460518.897 (2024-Jul-27.397) 99.99 ± 99.99 2.88
2460518.910 (2024-Jul-27.410) 99.99 ± 99.99 3.36
2460518.922 (2024-Jul-27.422) 99.99 ± 99.99 3.28
2460519.052 (2024-Jul-27.552) 99.99 ± 99.99 3.33

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

Single lens fit parameters

tmax =JD 2457888.35 ± 0.00 UT (2017-May-14.85)
tE =3115.63 ± 2584.49 days
u0 =0.0001 ± 0.0004
Ibase =26.70 ± 0.18

External data

Gzipped FITS finder chart

All photometry data

Machine readable VOEvent notice