MOA 2017-BLG-440

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Event Parameters

Internal ID:	gb17-R-4-18674
Discovery date:	2017-08-30T14:12:34
RA:	18:10:13.41
Dec:	-27:42:24.72
Current assessment:	microlensing

A transient event found by MOA.

Lightcurve

Finder chart

Nearest catalogued stars

starID	RA	Dec	mag	separation
141544	18:10:13.20	-27:42:21.04	16.78 ± 0.11	4.74
141570	18:10:13.26	-27:42:26.65	17.69 ± 0.16	3.76
141689	18:10:13.47	-27:42:23.86	15.15 ± 0.05	0.33
141733	18:10:13.56	-27:42:28.50	15.27 ± 0.17	4.73
141837	18:10:13.73	-27:42:21.54	19.03 ± 0.24	4.70

Last 5 photometry measurements

Observation date	I mag	seeing
2460610.879 (2024-Oct-27.379)	15.35 ± 0.08	5.29
2460610.916 (2024-Oct-27.416)	15.21 ± 0.04	5.02
2460611.891 (2024-Oct-28.391)	15.15 ± 0.02	4.35
2460611.926 (2024-Oct-28.426)	15.55 ± 0.14	5.61
2460614.884 (2024-Oct-31.384)	15.44 ± 0.10	5.20

Calibration: I = 27.40 - 2.5 log₁₀(ΔF + 79506.02)

Single lens fit parameters

t_max	=	JD 2458090.97	±	6.00 UT (2017-Dec-3.47)
t_E	=	50.07	±	13.96 days
u₀	=	1.4196	±	0.4962
I_base	=	13.94	±	0.28

External data

Gzipped FITS finder chart

All photometry data

Machine readable VOEvent notice