MOA 2021-BLG-257

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Event Parameters

Internal ID:	gb5-R-9-157410
Discovery date:	2021-07-13T16:23:39
RA:	17:56:19.70
Dec:	-28:51:02.22
Current assessment:	microlensing

A transient event found by MOA.

Lightcurve

Finder chart

Nearest catalogued stars

starID	RA	Dec	mag	separation
18270	17:56:19.89	-28:51:00.44	15.03 ± 0.09	4.02
18368	17:56:19.69	-28:51:07.11	16.16 ± 0.04	4.50
18464	17:56:19.46	-28:50:58.81	15.91 ± 0.06	4.94
18486	17:56:19.39	-28:51:05.67	16.50 ± 0.05	4.69

Last 5 photometry measurements

Observation date	I mag	seeing
2460246.848 (2023-Oct-29.348)	99.99 ± 99.99	3.79
2460246.883 (2023-Oct-29.383)	99.99 ± 99.99	3.52
2460246.895 (2023-Oct-29.395)	99.99 ± 99.99	3.43
2460246.905 (2023-Oct-29.405)	99.99 ± 99.99	3.49
2460246.917 (2023-Oct-29.417)	99.99 ± 99.99	3.47

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

Single lens fit parameters

t_max	=	JD 2459413.18	±	0.06 UT (2021-Jul-17.68)
t_E	=	10.09	±	1.97 days
u₀	=	0.7448	±	0.1850
I_base	=	17.24	±	0.21

External data

Gzipped FITS finder chart

All photometry data

Machine readable VOEvent notice