Color composite thumbnail image of M33C-15235M33C-15235 (J013351.46+304057.0)



Target Notes

Color composite thumbnail image of M33C-15235

Classification: Of/late-WN

(Candidate LBV) Normally unresolved from two LGGS stars 1 magnitudes fainter 1.5 arcseconds to E. Messy significant crowding by nearby sources.

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 17.32± 0.05ABM33C-15235 in filter V on MJD  56140.380
M33C-15235 in filter V on MJD  56140.380
---- 17.17± 0.11ABM33C-15235 in filter R on MJD  56140.380
M33C-15235 in filter R on MJD  56140.380
----
56593.16 17.41± 0.04BM33C-15235 in filter V on MJD  56593.160
17.33± 0.03BM33C-15235 in filter B on MJD  56593.160
--------
56599.18 17.29± 0.05ABM33C-15235 in filter V on MJD  56599.180
M33C-15235 in filter V on MJD  56599.180
17.34± 0.05ABM33C-15235 in filter B on MJD  56599.180
M33C-15235 in filter B on MJD  56599.180
17.08± 0.06ABM33C-15235 in filter R on MJD  56599.180
M33C-15235 in filter R on MJD  56599.180
----
56976.19 17.23± 0.04BM33C-15235 in filter V on MJD  56976.190
17.32± 0.04BM33C-15235 in filter B on MJD  56976.190
17.02± 0.07BM33C-15235 in filter R on MJD  56976.190
----
57310.13 17.23± 0.06BM33C-15235 in filter V on MJD  57310.130
17.31± 0.07BM33C-15235 in filter B on MJD  57310.130
16.94± 0.05BM33C-15235 in filter R on MJD  57310.130
----
57328.16 17.30± 0.04BM33C-15235 in filter V on MJD  57328.160
17.38± 0.04BM33C-15235 in filter B on MJD  57328.160
17.10± 0.04BM33C-15235 in filter R on MJD  57328.160
----
57335.18 17.28± 0.06BM33C-15235 in filter V on MJD  57335.180
---- 17.04± 0.05BM33C-15235 in filter R on MJD  57335.180
----
57401.10 17.30± 0.05BM33C-15235 in filter V on MJD  57401.100
17.29± 0.06BM33C-15235 in filter B on MJD  57401.100
--------
57406.10 17.27± 0.05BM33C-15235 in filter V on MJD  57406.100
17.44± 0.06BM33C-15235 in filter B on MJD  57406.100
17.06± 0.05BM33C-15235 in filter R on MJD  57406.100
17.07± 0.08BM33C-15235 in filter I on MJD  57406.100
57634.36 17.29± 0.05ABM33C-15235 in filter V on MJD  57634.360
M33C-15235 in filter V on MJD  57634.360
17.30± 0.06ABM33C-15235 in filter B on MJD  57634.360
M33C-15235 in filter B on MJD  57634.360
17.09± 0.06ABM33C-15235 in filter R on MJD  57634.360
M33C-15235 in filter R on MJD  57634.360
17.12± 0.08ABM33C-15235 in filter I on MJD  57634.360
M33C-15235 in filter I on MJD  57634.360
57687.13 17.31± 0.05BM33C-15235 in filter V on MJD  57687.130
17.29± 0.07BM33C-15235 in filter B on MJD  57687.130
17.04± 0.05BM33C-15235 in filter R on MJD  57687.130
17.13± 0.07BM33C-15235 in filter I on MJD  57687.130
57964.35 17.18± 0.04ABM33C-15235 in filter V on MJD  57964.350
M33C-15235 in filter V on MJD  57964.350
17.20± 0.06ABM33C-15235 in filter B on MJD  57964.350
M33C-15235 in filter B on MJD  57964.350
16.92± 0.05ABM33C-15235 in filter R on MJD  57964.350
M33C-15235 in filter R on MJD  57964.350
17.02± 0.07ABM33C-15235 in filter I on MJD  57964.350
M33C-15235 in filter I on MJD  57964.350
57988.41 17.21± 0.05BM33C-15235 in filter V on MJD  57988.410
17.29± 0.04BM33C-15235 in filter B on MJD  57988.410
--------
58043.10 17.21± 0.04BM33C-15235 in filter V on MJD  58043.100
---- 17.04± 0.04BM33C-15235 in filter R on MJD  58043.100
17.03± 0.07BM33C-15235 in filter I on MJD  58043.100
58045.16 17.14± 0.05ABM33C-15235 in filter V on MJD  58045.160
M33C-15235 in filter V on MJD  58045.160
17.19± 0.07ABM33C-15235 in filter B on MJD  58045.160
M33C-15235 in filter B on MJD  58045.160
16.96± 0.05ABM33C-15235 in filter R on MJD  58045.160
M33C-15235 in filter R on MJD  58045.160
----
58073.19 17.16± 0.04ABM33C-15235 in filter V on MJD  58073.190
M33C-15235 in filter V on MJD  58073.190
17.16± 0.06ABM33C-15235 in filter B on MJD  58073.190
M33C-15235 in filter B on MJD  58073.190
--------
58103.16 17.27± 0.05ABM33C-15235 in filter V on MJD  58103.160
M33C-15235 in filter V on MJD  58103.160
M33C-15235 in filter V on MJD  58103.160
17.25± 0.04BM33C-15235 in filter B on MJD  58103.160
---- 16.93± 0.07BM33C-15235 in filter I on MJD  58103.160
58108.13 17.25± 0.06ABM33C-15235 in filter V on MJD  58108.130
M33C-15235 in filter V on MJD  58108.130
17.30± 0.07ABM33C-15235 in filter B on MJD  58108.130
M33C-15235 in filter B on MJD  58108.130
---- 17.13± 0.10ABM33C-15235 in filter I on MJD  58108.130
M33C-15235 in filter I on MJD  58108.130
58312.39 17.37± 0.05BM33C-15235 in filter V on MJD  58312.390
17.43± 0.08BM33C-15235 in filter B on MJD  58312.390
--------
58317.38 17.43± 0.05ABM33C-15235 in filter V on MJD  58317.380
M33C-15235 in filter V on MJD  58317.380
17.37± 0.07BM33C-15235 in filter B on MJD  58317.380
17.21± 0.06ABM33C-15235 in filter R on MJD  58317.380
M33C-15235 in filter R on MJD  58317.380
----
58341.38 17.42± 0.07ABM33C-15235 in filter V on MJD  58341.380
M33C-15235 in filter V on MJD  58341.380
17.49± 0.08BM33C-15235 in filter B on MJD  58341.380
17.26± 0.08BM33C-15235 in filter R on MJD  58341.380
17.26± 0.09ABM33C-15235 in filter I on MJD  58341.380
M33C-15235 in filter I on MJD  58341.380
58342.40 17.25± 0.05BM33C-15235 in filter V on MJD  58342.400
17.30± 0.07BM33C-15235 in filter B on MJD  58342.400
M33C-15235 in filter B on MJD  58342.400
17.07± 0.05BM33C-15235 in filter R on MJD  58342.400
M33C-15235 in filter R on MJD  58342.400
----
58375.14 17.28± 0.05BM33C-15235 in filter V on MJD  58375.140
---- 17.08± 0.05BM33C-15235 in filter R on MJD  58375.140
----
58403.15 17.23± 0.04BM33C-15235 in filter V on MJD  58403.150
-------- 16.83± 0.09BM33C-15235 in filter I on MJD  58403.150
58420.06 17.24± 0.04BM33C-15235 in filter V on MJD  58420.060
17.27± 0.06BM33C-15235 in filter B on MJD  58420.060
17.09± 0.04BM33C-15235 in filter R on MJD  58420.060
17.00± 0.07BM33C-15235 in filter I on MJD  58420.060
58433.00 17.33± 0.05BM33C-15235 in filter V on MJD  58433.000
---- 17.04± 0.06BM33C-15235 in filter R on MJD  58433.000
17.09± 0.07BM33C-15235 in filter I on MJD  58433.000
58673.38 17.39± 0.03BM33C-15235 in filter V on MJD  58673.380
17.57± 0.04BM33C-15235 in filter B on MJD  58673.380
--------
58750.19 17.43± 0.03BM33C-15235 in filter V on MJD  58750.190
---- 17.20± 0.05BM33C-15235 in filter R on MJD  58750.190
----
58779.18 17.26± 0.04BM33C-15235 in filter V on MJD  58779.180
17.32± 0.04BM33C-15235 in filter B on MJD  58779.180
--------
58812.22 17.38± 0.05BM33C-15235 in filter V on MJD  58812.220
-------- 17.23± 0.06BM33C-15235 in filter I on MJD  58812.220
58902.06 17.36± 0.04ABM33C-15235 in filter V on MJD  58902.060
M33C-15235 in filter V on MJD  58902.060
---- 17.15± 0.05BM33C-15235 in filter R on MJD  58902.060
17.10± 0.08BM33C-15235 in filter I on MJD  58902.060
59056.38 17.43± 0.04BM33C-15235 in filter V on MJD  59056.380
17.41± 0.06BM33C-15235 in filter B on MJD  59056.380
17.09± 0.05BM33C-15235 in filter R on MJD  59056.380
17.29± 0.08BM33C-15235 in filter I on MJD  59056.380
59081.33 17.33± 0.03BM33C-15235 in filter V on MJD  59081.330
17.29± 0.06BM33C-15235 in filter B on MJD  59081.330
17.13± 0.03BM33C-15235 in filter R on MJD  59081.330
----
59082.34 17.35± 0.04ABM33C-15235 in filter V on MJD  59082.340
M33C-15235 in filter V on MJD  59082.340
17.33± 0.05ABM33C-15235 in filter B on MJD  59082.340
M33C-15235 in filter B on MJD  59082.340
M33C-15235 in filter B on MJD  59082.340
17.11± 0.05ABM33C-15235 in filter R on MJD  59082.340
M33C-15235 in filter R on MJD  59082.340
M33C-15235 in filter R on MJD  59082.340
----
59084.29-------- 17.10± 0.06TBM33C-15235 in filter R on MJD  59084.290
----
59161.09 17.36± 0.04ABM33C-15235 in filter V on MJD  59161.090
M33C-15235 in filter V on MJD  59161.090
17.33± 0.05ABM33C-15235 in filter B on MJD  59161.090
M33C-15235 in filter B on MJD  59161.090
17.14± 0.05ABM33C-15235 in filter R on MJD  59161.090
M33C-15235 in filter R on MJD  59161.090
----
59171.09 17.32± 0.04ABM33C-15235 in filter V on MJD  59171.090
M33C-15235 in filter V on MJD  59171.090
M33C-15235 in filter V on MJD  59171.090
17.31± 0.06ABM33C-15235 in filter B on MJD  59171.090
M33C-15235 in filter B on MJD  59171.090
16.85± 0.05XM33C-15235 in filter R on MJD  59171.090
17.08± 0.08ABM33C-15235 in filter I on MJD  59171.090
M33C-15235 in filter I on MJD  59171.090
M33C-15235 in filter I on MJD  59171.090
59227.09 17.38± 0.04ABM33C-15235 in filter V on MJD  59227.090
M33C-15235 in filter V on MJD  59227.090
17.37± 0.04ABM33C-15235 in filter B on MJD  59227.090
M33C-15235 in filter B on MJD  59227.090
17.15± 0.05BM33C-15235 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-15235Plot of color for M33C-15235

Key for Plot Variability Photometry Table Target Notes


Variability

Plot/Graph Photometry Table Target Notes

It is 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 [0.41 mag]B [0.29 mag]R [0.34 mag]
B [0.41 mag]0.53 (28)
R [0.34 mag]0.68 (25)0.48 (18)
I [0.46 mag]0.61 (15)0.50 (10)0.35 (10)

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-15235

Plot to assess correlation between bands for M33C-15235

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)
1.91 | 0.76
R
(I|R)
2.03 | 1.251.57 | 0.18
I
(I|R)
1.90 | 1.131.38 | 1.000.92 | 1.09

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