Color composite thumbnail image of M33C-13767M33C-13767 (J013352.39+303920.9)



Target Notes

Color composite thumbnail image of M33C-13767

Classification: OB-Supergiant

In a crowd with many LGGS stars >3 magnitudes fainter all around it. One pair 2.2 arcseconds away combines to be about 2 magnitudes fainter than the target in all bands. This blend is potentially problematic. I band measures marked "B" because not resolved when it should have according to LGGS. In other bands when the target is confused and not clearly resolved marked "X."

Find In Simbad Query LGGS Massey (2016) at VizieR Query CAT WISE (Eisenhardt et al., 2020) at VizieR Query Gaia EDR3 (2020) at VizieR LBT Spectra @UMN
Query M33 Variability Hartman et al. Survey (2006) at VizieR


Photometry Table

Download table (txt) Key to Flags in Table Key For Images Plot/Graph Variability
MJDV*ImageB*ImageR*ImagesI*Images
56140.38 16.82± 0.07AbM33C-13767 in filter V on MJD  56140.380
M33C-13767 in filter V on MJD  56140.380
---- 16.36± 0.09ABM33C-13767 in filter R on MJD  56140.380
M33C-13767 in filter R on MJD  56140.380
----
56593.16 16.60± 0.03BM33C-13767 in filter V on MJD  56593.160
16.57± 0.03bM33C-13767 in filter B on MJD  56593.160
--------
56599.18 16.78± 0.05AbM33C-13767 in filter V on MJD  56599.180
M33C-13767 in filter V on MJD  56599.180
16.75± 0.07AbM33C-13767 in filter B on MJD  56599.180
M33C-13767 in filter B on MJD  56599.180
16.38± 0.06ABM33C-13767 in filter R on MJD  56599.180
M33C-13767 in filter R on MJD  56599.180
----
56976.18 16.86± 0.06AbM33C-13767 in filter V on MJD  56976.180
M33C-13767 in filter V on MJD  56976.180
16.76± 0.06AbM33C-13767 in filter B on MJD  56976.180
M33C-13767 in filter B on MJD  56976.180
16.49± 0.06AbM33C-13767 in filter R on MJD  56976.180
M33C-13767 in filter R on MJD  56976.180
----
57310.13 16.75± 0.06bM33C-13767 in filter V on MJD  57310.130
16.38± 0.07BM33C-13767 in filter B on MJD  57310.130
16.22± 0.05bM33C-13767 in filter R on MJD  57310.130
----
57328.16 16.82± 0.05bM33C-13767 in filter V on MJD  57328.160
16.77± 0.06bM33C-13767 in filter B on MJD  57328.160
16.96± 0.08bM33C-13767 in filter R on MJD  57328.160
----
57335.18 17.12± 0.08bM33C-13767 in filter V on MJD  57335.180
---- 16.52± 0.07bM33C-13767 in filter R on MJD  57335.180
----
57401.10 16.70± 0.05BM33C-13767 in filter V on MJD  57401.100
17.05± 0.07bM33C-13767 in filter B on MJD  57401.100
--------
57406.10 16.75± 0.04BM33C-13767 in filter V on MJD  57406.100
16.85± 0.10bM33C-13767 in filter B on MJD  57406.100
16.56± 0.07bM33C-13767 in filter R on MJD  57406.100
16.76± 0.08BM33C-13767 in filter I on MJD  57406.100
57634.36 17.35± 0.07bM33C-13767 in filter V on MJD  57634.360
M33C-13767 in filter V on MJD  57634.360
16.87± 0.07AbM33C-13767 in filter B on MJD  57634.360
M33C-13767 in filter B on MJD  57634.360
16.43± 0.06AbM33C-13767 in filter R on MJD  57634.360
M33C-13767 in filter R on MJD  57634.360
16.65± 0.08ABM33C-13767 in filter I on MJD  57634.360
M33C-13767 in filter I on MJD  57634.360
57687.13 16.79± 0.05bM33C-13767 in filter V on MJD  57687.130
17.03± 0.07bM33C-13767 in filter B on MJD  57687.130
16.52± 0.06bM33C-13767 in filter R on MJD  57687.130
16.73± 0.07BM33C-13767 in filter I on MJD  57687.130
57964.35 16.77± 0.04ABM33C-13767 in filter V on MJD  57964.350
M33C-13767 in filter V on MJD  57964.350
16.64± 0.08AbM33C-13767 in filter B on MJD  57964.350
M33C-13767 in filter B on MJD  57964.350
16.49± 0.06AbM33C-13767 in filter R on MJD  57964.350
M33C-13767 in filter R on MJD  57964.350
16.75± 0.06ABM33C-13767 in filter I on MJD  57964.350
M33C-13767 in filter I on MJD  57964.350
57988.41 16.92± 0.07bM33C-13767 in filter V on MJD  57988.410
16.83± 0.04bM33C-13767 in filter B on MJD  57988.410
--------
58043.10 16.76± 0.07bM33C-13767 in filter V on MJD  58043.100
---- 16.62± 0.07bM33C-13767 in filter R on MJD  58043.100
16.65± 0.07BM33C-13767 in filter I on MJD  58043.100
58045.16 16.66± 0.05ABM33C-13767 in filter V on MJD  58045.160
M33C-13767 in filter V on MJD  58045.160
16.58± 0.07AbM33C-13767 in filter B on MJD  58045.160
M33C-13767 in filter B on MJD  58045.160
16.24± 0.05AbM33C-13767 in filter R on MJD  58045.160
M33C-13767 in filter R on MJD  58045.160
----
58073.19 16.67± 0.04ABM33C-13767 in filter V on MJD  58073.190
M33C-13767 in filter V on MJD  58073.190
16.83± 0.07AbM33C-13767 in filter B on MJD  58073.190
M33C-13767 in filter B on MJD  58073.190
--------
58103.16 17.00± 0.08AbM33C-13767 in filter V on MJD  58103.160
M33C-13767 in filter V on MJD  58103.160
M33C-13767 in filter V on MJD  58103.160
16.81± 0.06bM33C-13767 in filter B on MJD  58103.160
---- 17.70± 0.33BM33C-13767 in filter I on MJD  58103.160
58108.13 17.05± 0.12AbM33C-13767 in filter V on MJD  58108.130
M33C-13767 in filter V on MJD  58108.130
16.80± 0.09AbM33C-13767 in filter B on MJD  58108.130
M33C-13767 in filter B on MJD  58108.130
---- 16.83± 0.08ABM33C-13767 in filter I on MJD  58108.130
M33C-13767 in filter I on MJD  58108.130
58312.39 17.11± 0.10bM33C-13767 in filter V on MJD  58312.390
16.72± 0.07bM33C-13767 in filter B on MJD  58312.390
--------
58317.37 17.04± 0.08bM33C-13767 in filter V on MJD  58317.370
16.73± 0.07bM33C-13767 in filter B on MJD  58317.370
16.60± 0.05bM33C-13767 in filter R on MJD  58317.370
----
58341.34 16.99± 0.10bM33C-13767 in filter V on MJD  58341.340
-------- 17.10± 0.16BM33C-13767 in filter I on MJD  58341.340
58342.40 16.92± 0.12bM33C-13767 in filter V on MJD  58342.400
16.82± 0.09bM33C-13767 in filter B on MJD  58342.400
16.56± 0.06bM33C-13767 in filter R on MJD  58342.400
----
58375.14 17.02± 0.08bM33C-13767 in filter V on MJD  58375.140
---- 16.53± 0.06bM33C-13767 in filter R on MJD  58375.140
----
58420.10 16.62± 0.05bM33C-13767 in filter V on MJD  58420.100
16.98± 0.08bM33C-13767 in filter B on MJD  58420.100
---- 16.80± 0.07BM33C-13767 in filter I on MJD  58420.100
58433.00 16.88± 0.13bM33C-13767 in filter V on MJD  58433.000
---- 16.41± 0.07bM33C-13767 in filter R on MJD  58433.000
16.88± 0.07BM33C-13767 in filter I on MJD  58433.000
58672.39 17.29± 0.08bM33C-13767 in filter V on MJD  58672.390
---- 16.35± 0.07bM33C-13767 in filter R on MJD  58672.390
16.55± 0.09BM33C-13767 in filter I on MJD  58672.390
58673.38 16.94± 0.05bM33C-13767 in filter V on MJD  58673.380
16.83± 0.04bM33C-13767 in filter B on MJD  58673.380
--------
58695.36 16.93± 0.09bM33C-13767 in filter V on MJD  58695.360
17.04± 0.05bM33C-13767 in filter B on MJD  58695.360
17.33± 0.06bM33C-13767 in filter R on MJD  58695.360
----
58750.19 16.86± 0.08bM33C-13767 in filter V on MJD  58750.190
---- 16.70± 0.09bM33C-13767 in filter R on MJD  58750.190
----
58779.18 16.55± 0.04BM33C-13767 in filter V on MJD  58779.180
16.53± 0.05BM33C-13767 in filter B on MJD  58779.180
--------
58784.12 17.03± 0.06bM33C-13767 in filter V on MJD  58784.120
16.77± 0.07bM33C-13767 in filter B on MJD  58784.120
--------
58812.22 16.63± 0.04bM33C-13767 in filter V on MJD  58812.220
-------- 16.87± 0.06BM33C-13767 in filter I on MJD  58812.220
58902.06 17.03± 0.12bM33C-13767 in filter V on MJD  58902.060
---- 16.71± 0.05bM33C-13767 in filter R on MJD  58902.060
16.57± 0.08BM33C-13767 in filter I on MJD  58902.060
59056.38 17.01± 0.04bM33C-13767 in filter V on MJD  59056.380
16.70± 0.08bM33C-13767 in filter B on MJD  59056.380
16.53± 0.08bM33C-13767 in filter R on MJD  59056.380
16.93± 0.12BM33C-13767 in filter I on MJD  59056.380
59059.38 17.09± 0.12bM33C-13767 in filter V on MJD  59059.380
16.78± 0.08bM33C-13767 in filter B on MJD  59059.380
--------
59081.30 17.00± 0.11AbM33C-13767 in filter V on MJD  59081.300
M33C-13767 in filter V on MJD  59081.300
16.66± 0.07bM33C-13767 in filter B on MJD  59081.300
16.65± 0.08AbM33C-13767 in filter R on MJD  59081.300
M33C-13767 in filter R on MJD  59081.300
----
59082.32 17.05± 0.12bM33C-13767 in filter V on MJD  59082.320
16.64± 0.06bM33C-13767 in filter B on MJD  59082.320
M33C-13767 in filter B on MJD  59082.320
16.66± 0.07bM33C-13767 in filter R on MJD  59082.320
M33C-13767 in filter R on MJD  59082.320
M33C-13767 in filter R on MJD  59082.320
----
59084.29-------- 16.58± 0.06TbM33C-13767 in filter R on MJD  59084.290
----
59161.09 16.79± 0.07AbM33C-13767 in filter V on MJD  59161.090
M33C-13767 in filter V on MJD  59161.090
16.73± 0.09AbM33C-13767 in filter B on MJD  59161.090
M33C-13767 in filter B on MJD  59161.090
16.52± 0.05AbM33C-13767 in filter R on MJD  59161.090
M33C-13767 in filter R on MJD  59161.090
----
59171.11 16.62± 0.04AbM33C-13767 in filter V on MJD  59171.110
M33C-13767 in filter V on MJD  59171.110
16.83± 0.07bM33C-13767 in filter B on MJD  59171.110
---- 16.96± 0.11ABM33C-13767 in filter I on MJD  59171.110
M33C-13767 in filter I on MJD  59171.110
59227.09 16.94± 0.05AbM33C-13767 in filter V on MJD  59227.090
M33C-13767 in filter V on MJD  59227.090
16.84± 0.05AbM33C-13767 in filter B on MJD  59227.090
M33C-13767 in filter B on MJD  59227.090
16.59± 0.05bM33C-13767 in filter R on MJD  59227.090
----
Download table (txt) Key to Flags in Table Key For Images Plot/Graph Variability


Plots of Brightness and Color

Key for Plot Variability Photometry Table Target Notes

Plot of photometry for M33C-13767Plot of color for M33C-13767

Key for Plot Variability Photometry Table Target Notes


Variability

Plot/Graph Photometry Table Target Notes

From the data available in this survey, it is not possible to tell with certainty if 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 [0.66 mag]B [0.81 mag]R [1.10 mag]
B [0.66 mag]0.02 (30)
R [1.10 mag]0.00 (25)0.33 (17)
I [1.15 mag]0.01 (15)0.02 (9)0.02 (9)

Magnitude-Magnitude Plots

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

Plot to assess correlation between bands for M33C-13767

Plot to assess correlation between bands for M33C-13767

Plot/Graph Photometry Table Target Notes

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)
2.49 | 0.69
R
(I|R)
1.40 | 0.857.67 | 0.35
I
(I|R)
-1.81 | 2.00-0.51 | 1.09-0.82 | 1.10

Back to catalog index


By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory

Generated on 2021-11-06 16:53:54 UT-5