MOA 2017-BLG-257

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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

starID	RA	Dec	mag	separation
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 date	I mag	seeing
2460246.899 (2023-Oct-29.399)	99.99 ± 99.99	3.06
2460246.910 (2023-Oct-29.410)	99.99 ± 99.99	3.21
2460246.922 (2023-Oct-29.422)	99.99 ± 99.99	3.77
2460246.930 (2023-Oct-29.430)	99.99 ± 99.99	3.50
2460246.933 (2023-Oct-29.433)	99.99 ± 99.99	3.70

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

Single lens fit parameters

t_max	=	JD 2457888.35	±	0.00 UT (2017-May-14.85)
t_E	=	3115.63	±	2584.49 days
u₀	=	0.0001	±	0.0004
I_base	=	26.70	±	0.18

External data

Gzipped FITS finder chart

All photometry data

Machine readable VOEvent notice