M33C-11332 (J013416.35+303712.3)

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Target Notes

Classification: Of/late-WN

Seven LGGS stars >3 magnitudes fainter within 5 arcseconds.

Photometry Table

MJD	V	*	Image	B	*	Image	R	*	Images	I	*	Images
56140.37	17.87± 0.06	b		--	-	-	17.40± 0.11	b		--	-	-
56599.17	17.77± 0.05	b		17.83± 0.06	b		17.37± 0.05	b		--	-	-
56976.16	17.83± 0.05	b		17.77± 0.06	b		17.27± 0.06	b		--	-	-
57038.13	17.82± 0.05	b		17.69± 0.05	b		17.28± 0.05	b		--	-	-
57310.13	17.75± 0.06	b		17.51± 0.07	b		17.20± 0.05	b		--	-	-
57335.18	17.86± 0.07	b		--	-	-	17.21± 0.06	b		--	-	-
57401.10	17.87± 0.05	b		17.73± 0.06	b		--	-	-	--	-	-
57406.10	17.66± 0.07	b		17.77± 0.07	b		17.29± 0.06	b		17.82± 0.12	b
57634.34	17.93± 0.05	b		17.81± 0.08	b		17.40± 0.06	b		18.16± 0.08	b
57638.43	17.88± 0.07	b		--	-	-	--	-	-	17.82± 0.11	b
57687.13	17.80± 0.05	b		17.76± 0.07	b		17.43± 0.05	b		17.88± 0.08	b
57964.35	17.84± 0.05	Ab		17.82± 0.07	Ab		17.38± 0.06	Ab		17.98± 0.07	Ab
58045.16	17.78± 0.05	Ab		17.70± 0.07	Ab		17.29± 0.06	Ab		--	-	-
58073.19	17.70± 0.05	Ab		17.81± 0.07	Ab		--	-	-	--	-	-
58103.16	17.85± 0.05	Ab		--	-	-	--	-	-	17.85± 0.09	b
58108.11	17.88± 0.06	b		17.76± 0.09	b		--	-	-	19.22± 0.51	X
58312.39	18.00± 0.06	b		17.87± 0.09	b		--	-	-	--	-	-
58316.38	17.90± 0.04	b		17.91± 0.06	b		17.41± 0.04	b		18.32± 0.08	b
58317.37	18.01± 0.06	b		17.81± 0.07	b		17.48± 0.06	b		--	-	-
58341.34	17.95± 0.07	b		--	-	-	--	-	-	17.92± 0.08	b
58342.38	17.86± 0.06	Ab		17.77± 0.07	Ab		17.51± 0.07	Ab		17.84± 0.09	b
58375.14	17.91± 0.05	b		--	-	-	17.37± 0.05	b		--	-	-
58420.08	17.88± 0.05	Ab		17.78± 0.07	Ab		17.35± 0.05	b		18.14± 0.12	Ab
58433.00	17.90± 0.07	b		--	-	-	17.35± 0.07	b		18.08± 0.12	b
58672.39	17.85± 0.09	b		--	-	-	17.43± 0.07	b		> 14.68	b
58695.36	17.98± 0.06	b		17.85± 0.06	b		17.53± 0.06	b		--	-	-
58784.12	17.84± 0.06	b		17.86± 0.06	b		--	-	-	--	-	-
58812.22	17.86± 0.06	b		--	-	-	--	-	-	17.91± 0.07	b
58902.07	17.87± 0.05	b		--	-	-	17.39± 0.06	b		--	-	-
59059.38	17.97± 0.05	b		17.88± 0.06	b		--	-	-	--	-	-
59081.30	17.89± 0.05	Ab		17.84± 0.06	b		17.39± 0.06	Ab		--	-	-
59084.34	--	-	-	--	-	-	17.41± 0.06	Tb		--	-	-
59161.07	17.99± 0.06	b		17.80± 0.07	b		17.53± 0.06	b		--	-	-
59171.09	17.80± 0.06	b		--	-	-	--	-	-	17.99± 0.08	b
59227.08	17.95± 0.05	b		17.91± 0.05	b		17.51± 0.07	b		--	-	-
59415.36	18.09± 0.06	b		--	-	-	17.57± 0.07	b		--	-	-
59441.39	17.94± 0.06	b		17.90± 0.06	b		--	-	-	--	-	-
59463.30	17.94± 0.06	Ab		--	-	-	--	-	-	18.07± 0.07	b
59523.15	17.90± 0.05	b		--	-	-	17.55± 0.06	b		--	-	-
59525.15	17.93± 0.05	b		17.85± 0.05	b		--	-	-	--	-	-
59546.15	17.93± 0.05	b		--	-	-	--	-	-	18.03± 0.07	b
59551.11	17.84± 0.05	b		17.81± 0.06	b		--	-	-	--	-	-
59583.15	18.00± 0.05	b		--	-	-	17.62± 0.06	b		--	-	-
59608.07	17.77± 0.05	b		--	-	-	--	-	-	18.29± 0.10	b
59794.35	17.91± 0.06	Tb		--	-	-	--	-	-	--	-	-
59823.24	17.83± 0.05	b		17.88± 0.05	b		--	-	-	--	-	-
59851.13	17.78± 0.05	b		--	-	-	17.17± 0.05	b		--	-	-
59854.22	17.81± 0.05	b		17.81± 0.06	b		--	-	-	--	-	-
59879.12	17.88± 0.06	b		--	-	-	--	-	-	18.20± 0.10	Ab
59904.12	17.84± 0.05	b		17.83± 0.05	b		17.34± 0.06	b		17.92± 0.07	b
59932.13	17.84± 0.07	b		--	-	-	17.63± 0.07	b		--	-	-
60172.37	17.93± 0.05	b		17.84± 0.05	b		--	-	-	--	-	-
60205.15	17.78± 0.06	b		--	-	-	17.38± 0.06	b		--	-	-
60227.12	17.82± 0.06	b		--	-	-	--	-	-	17.89± 0.09	b
60262.13	17.69± 0.05	b		17.72± 0.05	b		17.39± 0.06	b		--	-	-
60290.15	17.99± 0.06	b		17.75± 0.06	b		--	-	-	18.14± 0.09	b
60292.18	17.94± 0.05	b		--	-	-	17.39± 0.07	b		--	-	-
60342.09	18.04± 0.05	Ab		--	-	-	17.60± 0.07	b		17.90± 0.09	b
60504.38	17.85± 0.06	b		17.90± 0.05	b		17.56± 0.07	b		--	-	-
60529.36	17.93± 0.06	b		--	-	-	--	-	-	18.09± 0.08	b
60556.24	17.84± 0.05	b		17.82± 0.05	b		17.53± 0.06	b		--	-	-
60564.22	17.78± 0.05	b		17.79± 0.07	b		17.34± 0.06	b		--	-	-
60594.10	18.05± 0.07	b		--	-	-	--	-	-	18.46± 0.13	-
60612.14	17.87± 0.06	b		--	-	-	17.38± 0.07	b		--	-	-
60651.14	17.97± 0.05	b		17.89± 0.06	b		--	-	-	--	-	-
61025.23	19.48± 0.11	b		> 16.41	b		19.02± 0.10	b		18.93± 0.18	b
61052.19	19.73± 0.12	b		20.01± 0.14	b		19.20± 0.09	b		--	-	-
61055.17	19.61± 0.11	b		--	-	-	--	-	-	18.81± 0.11	b
61080.09	19.40± 0.10	Ab		--	-	-	19.29± 0.09	b		--	-	-
61083.07	19.21± 0.09	b		19.62± 0.09	b		19.09± 0.10	b		--	-	-

Plots of Brightness and Color

Variability

It is very likely that this star is variable.

Correlation factors between bands

If the brightness variation is true variability then there should be a correlation between brightness changes recorded in different filter bands. The following table are the R-squared linear correlation factors calculated for the pairs of bands. The number in parentheses next to the R-squared value is the number of elements used to calculate the correlation factor. The number in square brackets next to the band is the range of magnitudes measured.

	V [2.07 mag]	B [2.50 mag]	R [2.12 mag]
B [2.50 mag]	0.95 (38)
R [2.12 mag]	0.96 (41)	0.97 (24)
I [1.11 mag]	0.70 (25)	0.34 (9)	0.71 (11)

Magnitude-Magnitude Plots

The plots below are provided to check the values in the table above and also to show any non-linear correlations

I & R Statistics

Welch & Stetson (1993, AJ, 105, 1813) present a method for varible star detection in CCD images from automated surveys. Data from two bands are compared and two statistics are calculated: R and I.

The I-statistic has an expectation value of zero for stars that are NOT variable. A larger non-zero I-value indicates a higher likelihood that the star is variable. The R statistic indicates how the color of the star changes as the variable grows brighter with R = 1.0 being no change in color.

R and I values have only been calculated if there are more than four (4) matched measurements of brightness in each band.

	V (I|R)	B (I|R)	R (I|R)
B (I|R)	14.71 | 0.87
R (I|R)	29.00 | 0.80	28.66 | 0.30
I (I|R)	8.07 | 1.22	0.83 | 0.35	7.19 | 1.46