M33-013358.05 (J013358.05+304539.9)

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Target Notes

Classification: Warm-Hypergiant

No blend concerns.

Photometry Table

MJD	V	*	Image	B	*	Image	R	*	Images	I	*	Images
56140.38	16.32± 0.04	A		--	-	-	15.98± 0.07	A		--	-	-
56593.16	16.36± 0.03	-		16.88± 0.02	-		--	-	-	--	-	-
56599.18	16.39± 0.04	A		16.89± 0.05	A		15.99± 0.05	A		--	-	-
56976.18	16.34± 0.04	A		16.84± 0.05	A		15.96± 0.06	A		--	-	-
57038.13	16.53± 0.04	-		16.96± 0.05	-		16.16± 0.04	-		--	-	-
57310.13	16.41± 0.05	X		16.83± 0.07	-		16.07± 0.05	-		--	-	-
57335.18	16.46± 0.06	-		--	-	-	16.06± 0.04	-		--	-	-
57401.10	16.46± 0.04	-		16.89± 0.05	-		--	-	-	--	-	-
57406.10	16.49± 0.04	-		16.99± 0.04	-		16.15± 0.05	-		15.89± 0.07	-
57634.34	16.55± 0.04	-		16.91± 0.07	-		16.18± 0.05	-		15.93± 0.06	-
57638.35	16.71± 0.03	-		17.10± 0.06	-		16.37± 0.05	-		16.06± 0.07	-
57687.13	16.56± 0.04	-		16.98± 0.06	-		16.25± 0.04	-		15.96± 0.06	-
57964.37	16.60± 0.04	-		16.99± 0.06	-		16.26± 0.04	-		15.98± 0.06	-
57988.41	16.63± 0.04	-		17.04± 0.04	-		--	-	-	--	-	-
58043.10	16.67± 0.04	-		--	-	-	16.30± 0.04	-		15.98± 0.06	-
58045.15	16.68± 0.04	-		17.07± 0.07	-		16.38± 0.04	-		--	-	-
58073.18	16.67± 0.03	-		17.09± 0.06	-		--	-	-	--	-	-
58103.16	16.66± 0.04	A		17.06± 0.04	-		--	-	-	16.10± 0.06	-
58108.14	16.66± 0.05	-		17.06± 0.06	-		--	-	-	15.99± 0.08	-
58316.38	16.70± 0.03	-		17.09± 0.05	-		16.37± 0.03	-		16.07± 0.04	-
58317.39	16.72± 0.04	-		--	-	-	16.41± 0.07	-		--	-	-
58341.40	16.70± 0.05	-		17.10± 0.08	-		16.38± 0.07	-		16.06± 0.10	-
58342.36	16.68± 0.03	-		17.10± 0.06	-		16.36± 0.03	-		16.03± 0.06	-
58403.15	16.61± 0.04	-		--	-	-	--	-	-	16.05± 0.09	-
58420.06	16.69± 0.04	-		17.08± 0.06	-		16.37± 0.04	-		16.10± 0.06	-
58433.00	16.70± 0.04	-		--	-	-	16.36± 0.05	-		16.07± 0.06	-
58696.39	16.73± 0.04	-		17.08± 0.06	-		16.41± 0.04	-		--	-	-
58779.15	16.61± 0.04	-		--	-	-	16.29± 0.05	-		16.01± 0.07	-
58812.22	16.74± 0.05	-		--	-	-	--	-	-	16.17± 0.05	-
58902.06	16.79± 0.03	A		--	-	-	16.44± 0.04	-		16.23± 0.07	-
59056.38	16.83± 0.04	-		17.20± 0.06	-		16.45± 0.04	-		16.20± 0.07	-
59081.33	16.80± 0.03	-		17.17± 0.06	-		16.45± 0.03	-		--	-	-
59082.34	16.81± 0.03	A		17.19± 0.05	A		16.46± 0.05	A		--	-	-
59084.29	--	-	-	--	-	-	16.42± 0.05	T		--	-	-
59161.09	16.88± 0.04	A		17.29± 0.05	A		16.53± 0.04	A		--	-	-
59171.09	16.84± 0.04	A		17.25± 0.05	A		16.44± 0.05	-		16.24± 0.07	A
59227.08	16.84± 0.03	A		17.23± 0.04	A		16.52± 0.05	A		--	-	-
59415.37	16.86± 0.04	A		17.31± 0.03	-		16.49± 0.04	-		--	-	-
59441.40	16.84± 0.05	A		17.20± 0.06	-		16.52± 0.05	-		16.23± 0.07	-
59442.39	16.86± 0.02	-		--	-	-	16.53± 0.05	-		16.23± 0.07	-
59463.28	16.82± 0.04	A		17.19± 0.06	-		--	-	-	16.24± 0.05	-
59523.16	16.80± 0.03	A		17.23± 0.03	-		16.46± 0.04	-		--	-	-
59525.15	16.78± 0.03	A		17.14± 0.04	-		16.44± 0.05	-		16.21± 0.09	-
59546.18	16.81± 0.03	A		17.15± 0.06	-		16.50± 0.04	-		16.22± 0.05	-
59551.12	16.83± 0.04	A		17.20± 0.04	A		--	-	-	16.21± 0.08	-
59583.16	16.83± 0.03	A		17.20± 0.06	-		16.51± 0.04	-		16.21± 0.08	-
59608.09	16.80± 0.04	A		--	-	-	16.52± 0.05	A		16.22± 0.05	-
59794.36	16.84± 0.04	A		17.21± 0.05	A		--	-	-	--	-	-
59823.24	16.85± 0.04	-		17.23± 0.04	-		--	-	-	--	-	-
59849.18	16.82± 0.04	A		--	-	-	16.48± 0.05	-		16.21± 0.08	-
59851.15	16.84± 0.04	A		--	-	-	16.48± 0.05	A		16.30± 0.08	-
59854.20	16.85± 0.04	A		17.22± 0.05	A		16.50± 0.05	-		--	-	-
59879.13	16.93± 0.05	A		17.27± 0.03	-		--	-	-	16.26± 0.06	A
59903.20	16.87± 0.03	A		17.26± 0.04	A		16.54± 0.05	A		16.22± 0.08	A
59904.12	16.88± 0.04	-		17.25± 0.05	-		16.55± 0.04	-		16.30± 0.06	-
59932.15	16.86± 0.04	A		17.17± 0.08	-		16.54± 0.05	-		16.24± 0.09	-
60172.38	16.95± 0.03	A		17.30± 0.04	-		16.57± 0.04	-		--	-	-
60205.16	16.91± 0.04	A		17.33± 0.03	-		16.55± 0.05	-		--	-	-
60227.11	16.88± 0.04	A		17.24± 0.07	-		16.55± 0.05	-		16.25± 0.07	A
60261.12	16.93± 0.03	-		--	-	-	16.54± 0.05	-		--	-	-
60262.14	16.91± 0.03	A		17.30± 0.05	A		16.57± 0.04	-		16.23± 0.09	-
60290.15	16.91± 0.04	A		17.26± 0.05	A		16.60± 0.05	-		16.30± 0.08	A
60292.18	16.91± 0.03	A		--	-	-	16.59± 0.05	A		16.26± 0.07	-
60342.09	16.91± 0.04	A		17.31± 0.03	-		16.58± 0.05	-		16.27± 0.07	-
60504.38	16.90± 0.04	-		17.22± 0.04	-		16.57± 0.05	-		--	-	-
60506.37	16.91± 0.03	A		17.27± 0.03	-		16.56± 0.04	-		16.32± 0.07	-
60529.37	16.87± 0.04	A		17.21± 0.06	-		--	-	-	16.28± 0.06	-
60533.38	16.90± 0.03	-		--	-	-	16.57± 0.05	-		16.30± 0.08	-
60556.27	16.94± 0.04	A		17.29± 0.04	A		16.61± 0.04	-		16.27± 0.07	-
60564.22	16.98± 0.04	-		17.28± 0.07	-		16.62± 0.05	-		--	-	-
60594.11	16.93± 0.04	A		--	-	-	16.58± 0.05	-		16.31± 0.07	A
60595.13	16.87± 0.04	-		17.28± 0.07	-		16.56± 0.05	-		--	-	-
60612.15	16.93± 0.04	A		17.27± 0.02	-		16.59± 0.06	-		--	-	-
60651.16	16.94± 0.04	A		17.25± 0.05	-		16.66± 0.05	-		16.35± 0.09	-

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 [0.67 mag]	B [0.49 mag]	R [0.70 mag]
B [0.49 mag]	0.94 (55)
R [0.70 mag]	0.98 (58)	0.90 (44)
I [0.46 mag]	0.92 (44)	0.86 (31)	0.92 (36)

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)	12.56 | 0.70
R (I|R)	12.73 | 1.19	17.24 | 0.13
I (I|R)	5.34 | 1.66	3.72 | 1.06	4.97 | 1.36