MOA 2021-BLG-457

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Event Parameters

Internal ID:	gb4-R-4-36944
Discovery date:	2021-10-29T12:55:51
RA:	17:52:34.21
Dec:	-31:23:22.74
Current assessment:	microlensing

A transient event found by MOA.

Lightcurve

Finder chart

Nearest catalogued stars

starID	RA	Dec	mag	separation
28302	17:52:33.97	-31:23:21.14	17.89 ± 0.09	3.94
28415	17:52:34.28	-31:23:26.74	18.48 ± 0.13	4.77
28416	17:52:34.28	-31:23:21.85	18.46 ± 0.19	0.42
28486	17:52:34.49	-31:23:25.54	15.66 ± 0.05	4.67
28505	17:52:34.53	-31:23:21.46	18.18 ± 0.12	3.74

Last 5 photometry measurements

Observation date	I mag	seeing
2460246.887 (2023-Oct-29.387)	18.51 ± 0.18	3.39
2460246.898 (2023-Oct-29.398)	18.29 ± 0.13	3.10
2460246.909 (2023-Oct-29.409)	18.68 ± 0.20	3.35
2460246.920 (2023-Oct-29.420)	18.86 ± 0.42	3.61
2460246.929 (2023-Oct-29.429)	18.59 ± 0.30	3.56

Calibration: I = 27.40 - 2.5 log₁₀(ΔF + 3770.51)

Single lens fit parameters

t_max	=	JD 2459516.98	±	0.04 UT (2021-Oct-29.48)
t_E	=	80.77	±	4.54 days
u₀	=	0.0231	±	0.0015
I_base	=	20.34	±	0.21

External data

Gzipped FITS finder chart

All photometry data

Machine readable VOEvent notice