Color composite thumbnail image of M33C-15731M33C-15731 (J013350.12+304126.6)



Target Notes

Color composite thumbnail image of M33C-15731

Classification: B[e]sg

One LGGS star less than 2 arcseconds away. Influence of unresolved blend is negligible in B (about 4 mags fainter). Earns 'b' for being unresolved in V (about 3 mags fainter) for being about size of error bar. Earns 'B' mark in both R ( about 2 mags fainter) and I (about 1 mag fainter) for influence greater than the size of the error bar. **Updated 180529***

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 16.70± 0.05AbM33C-15731 in filter V on MJD  56140.380
M33C-15731 in filter V on MJD  56140.380
---- 16.21± 0.07ABM33C-15731 in filter R on MJD  56140.380
M33C-15731 in filter R on MJD  56140.380
----
56593.16 16.69± 0.03bM33C-15731 in filter V on MJD  56593.160
16.75± 0.02-M33C-15731 in filter B on MJD  56593.160
--------
56599.18 16.70± 0.04AbM33C-15731 in filter V on MJD  56599.180
M33C-15731 in filter V on MJD  56599.180
16.83± 0.05AM33C-15731 in filter B on MJD  56599.180
M33C-15731 in filter B on MJD  56599.180
16.19± 0.06ABM33C-15731 in filter R on MJD  56599.180
M33C-15731 in filter R on MJD  56599.180
----
56976.19 16.62± 0.04bM33C-15731 in filter V on MJD  56976.190
16.78± 0.04-M33C-15731 in filter B on MJD  56976.190
16.12± 0.06BM33C-15731 in filter R on MJD  56976.190
----
57310.13 16.54± 0.05bM33C-15731 in filter V on MJD  57310.130
16.66± 0.07-M33C-15731 in filter B on MJD  57310.130
16.11± 0.05BM33C-15731 in filter R on MJD  57310.130
----
57328.16 16.63± 0.03bM33C-15731 in filter V on MJD  57328.160
16.75± 0.04-M33C-15731 in filter B on MJD  57328.160
16.14± 0.04BM33C-15731 in filter R on MJD  57328.160
----
57335.18 16.64± 0.06bM33C-15731 in filter V on MJD  57335.180
---- 16.12± 0.05BM33C-15731 in filter R on MJD  57335.180
----
57401.10 16.65± 0.04bM33C-15731 in filter V on MJD  57401.100
16.71± 0.05-M33C-15731 in filter B on MJD  57401.100
--------
57406.10 16.62± 0.04bM33C-15731 in filter V on MJD  57406.100
16.72± 0.04-M33C-15731 in filter B on MJD  57406.100
16.18± 0.04BM33C-15731 in filter R on MJD  57406.100
15.93± 0.07BM33C-15731 in filter I on MJD  57406.100
57634.35 16.67± 0.04AbM33C-15731 in filter V on MJD  57634.350
M33C-15731 in filter V on MJD  57634.350
16.72± 0.06AM33C-15731 in filter B on MJD  57634.350
M33C-15731 in filter B on MJD  57634.350
16.17± 0.06ABM33C-15731 in filter R on MJD  57634.350
M33C-15731 in filter R on MJD  57634.350
15.90± 0.06BM33C-15731 in filter I on MJD  57634.350
57687.13 16.62± 0.05bM33C-15731 in filter V on MJD  57687.130
16.70± 0.06-M33C-15731 in filter B on MJD  57687.130
16.16± 0.05BM33C-15731 in filter R on MJD  57687.130
15.88± 0.06BM33C-15731 in filter I on MJD  57687.130
57964.35 16.67± 0.04AbM33C-15731 in filter V on MJD  57964.350
M33C-15731 in filter V on MJD  57964.350
16.70± 0.06AM33C-15731 in filter B on MJD  57964.350
M33C-15731 in filter B on MJD  57964.350
16.14± 0.05ABM33C-15731 in filter R on MJD  57964.350
M33C-15731 in filter R on MJD  57964.350
15.96± 0.06ABM33C-15731 in filter I on MJD  57964.350
M33C-15731 in filter I on MJD  57964.350
57988.41 16.67± 0.05bM33C-15731 in filter V on MJD  57988.410
16.74± 0.04-M33C-15731 in filter B on MJD  57988.410
--------
58043.10 16.65± 0.04bM33C-15731 in filter V on MJD  58043.100
---- 16.12± 0.04BM33C-15731 in filter R on MJD  58043.100
15.84± 0.07BM33C-15731 in filter I on MJD  58043.100
58045.16 16.59± 0.05AbM33C-15731 in filter V on MJD  58045.160
M33C-15731 in filter V on MJD  58045.160
16.64± 0.07-M33C-15731 in filter B on MJD  58045.160
M33C-15731 in filter B on MJD  58045.160
16.14± 0.05ABM33C-15731 in filter R on MJD  58045.160
M33C-15731 in filter R on MJD  58045.160
----
58073.19 16.65± 0.04AbM33C-15731 in filter V on MJD  58073.190
M33C-15731 in filter V on MJD  58073.190
16.65± 0.06AM33C-15731 in filter B on MJD  58073.190
M33C-15731 in filter B on MJD  58073.190
--------
58103.16 16.66± 0.04AbM33C-15731 in filter V on MJD  58103.160
M33C-15731 in filter V on MJD  58103.160
M33C-15731 in filter V on MJD  58103.160
16.75± 0.04-M33C-15731 in filter B on MJD  58103.160
---- 15.94± 0.06BM33C-15731 in filter I on MJD  58103.160
58108.13 16.67± 0.05AbM33C-15731 in filter V on MJD  58108.130
M33C-15731 in filter V on MJD  58108.130
16.71± 0.07AM33C-15731 in filter B on MJD  58108.130
M33C-15731 in filter B on MJD  58108.130
---- 15.96± 0.08ABM33C-15731 in filter I on MJD  58108.130
M33C-15731 in filter I on MJD  58108.130
58312.39 16.72± 0.05bM33C-15731 in filter V on MJD  58312.390
16.84± 0.07-M33C-15731 in filter B on MJD  58312.390
--------
58317.38 16.74± 0.04AbM33C-15731 in filter V on MJD  58317.380
M33C-15731 in filter V on MJD  58317.380
16.72± 0.06-M33C-15731 in filter B on MJD  58317.380
16.23± 0.06ABM33C-15731 in filter R on MJD  58317.380
M33C-15731 in filter R on MJD  58317.380
----
58341.38 16.81± 0.06AbM33C-15731 in filter V on MJD  58341.380
M33C-15731 in filter V on MJD  58341.380
16.91± 0.08-M33C-15731 in filter B on MJD  58341.380
16.34± 0.07BM33C-15731 in filter R on MJD  58341.380
16.05± 0.09ABM33C-15731 in filter I on MJD  58341.380
M33C-15731 in filter I on MJD  58341.380
58342.40 16.68± 0.05bM33C-15731 in filter V on MJD  58342.400
16.75± 0.06-M33C-15731 in filter B on MJD  58342.400
M33C-15731 in filter B on MJD  58342.400
16.15± 0.05BM33C-15731 in filter R on MJD  58342.400
M33C-15731 in filter R on MJD  58342.400
----
58403.15 16.61± 0.04bM33C-15731 in filter V on MJD  58403.150
-------- 15.97± 0.09BM33C-15731 in filter I on MJD  58403.150
58420.06 16.64± 0.04bM33C-15731 in filter V on MJD  58420.060
16.72± 0.06-M33C-15731 in filter B on MJD  58420.060
16.15± 0.04BM33C-15731 in filter R on MJD  58420.060
15.86± 0.06BM33C-15731 in filter I on MJD  58420.060
58433.00 16.63± 0.05bM33C-15731 in filter V on MJD  58433.000
---- 16.17± 0.05BM33C-15731 in filter R on MJD  58433.000
15.91± 0.06BM33C-15731 in filter I on MJD  58433.000
58673.38 16.75± 0.03bM33C-15731 in filter V on MJD  58673.380
16.88± 0.03-M33C-15731 in filter B on MJD  58673.380
--------
58750.19 16.72± 0.03bM33C-15731 in filter V on MJD  58750.190
---- 16.19± 0.05BM33C-15731 in filter R on MJD  58750.190
----
58779.18 16.68± 0.04bM33C-15731 in filter V on MJD  58779.180
16.71± 0.03-M33C-15731 in filter B on MJD  58779.180
--------
58812.22 16.66± 0.04bM33C-15731 in filter V on MJD  58812.220
-------- 15.84± 0.05BM33C-15731 in filter I on MJD  58812.220
58902.06 16.63± 0.03AbM33C-15731 in filter V on MJD  58902.060
M33C-15731 in filter V on MJD  58902.060
---- 16.13± 0.04BM33C-15731 in filter R on MJD  58902.060
15.85± 0.08BM33C-15731 in filter I on MJD  58902.060
59056.38 16.68± 0.04bM33C-15731 in filter V on MJD  59056.380
16.73± 0.06-M33C-15731 in filter B on MJD  59056.380
16.13± 0.05BM33C-15731 in filter R on MJD  59056.380
15.93± 0.08BM33C-15731 in filter I on MJD  59056.380
59081.33 16.64± 0.03bM33C-15731 in filter V on MJD  59081.330
16.67± 0.06-M33C-15731 in filter B on MJD  59081.330
16.14± 0.03BM33C-15731 in filter R on MJD  59081.330
----
59082.34 16.63± 0.03AbM33C-15731 in filter V on MJD  59082.340
M33C-15731 in filter V on MJD  59082.340
16.70± 0.05AM33C-15731 in filter B on MJD  59082.340
M33C-15731 in filter B on MJD  59082.340
M33C-15731 in filter B on MJD  59082.340
16.14± 0.05ABM33C-15731 in filter R on MJD  59082.340
M33C-15731 in filter R on MJD  59082.340
M33C-15731 in filter R on MJD  59082.340
----
59084.29-------- 16.16± 0.06TBM33C-15731 in filter R on MJD  59084.290
----
59161.09 16.66± 0.04AbM33C-15731 in filter V on MJD  59161.090
M33C-15731 in filter V on MJD  59161.090
16.74± 0.05AM33C-15731 in filter B on MJD  59161.090
M33C-15731 in filter B on MJD  59161.090
16.16± 0.04ABM33C-15731 in filter R on MJD  59161.090
M33C-15731 in filter R on MJD  59161.090
----
59171.09 16.63± 0.04AbM33C-15731 in filter V on MJD  59171.090
M33C-15731 in filter V on MJD  59171.090
M33C-15731 in filter V on MJD  59171.090
16.71± 0.05AM33C-15731 in filter B on MJD  59171.090
M33C-15731 in filter B on MJD  59171.090
16.07± 0.05BM33C-15731 in filter R on MJD  59171.090
15.85± 0.07ABM33C-15731 in filter I on MJD  59171.090
M33C-15731 in filter I on MJD  59171.090
M33C-15731 in filter I on MJD  59171.090
59227.08 16.66± 0.04AbM33C-15731 in filter V on MJD  59227.080
M33C-15731 in filter V on MJD  59227.080
M33C-15731 in filter V on MJD  59227.080
16.75± 0.04AM33C-15731 in filter B on MJD  59227.080
M33C-15731 in filter B on MJD  59227.080
M33C-15731 in filter B on MJD  59227.080
16.16± 0.05ABM33C-15731 in filter R on MJD  59227.080
M33C-15731 in filter R on MJD  59227.080
----
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-15731Plot of color for M33C-15731

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 [0.26 mag]B [0.27 mag]R [0.27 mag]
B [0.26 mag]0.58 (28)
R [0.27 mag]0.62 (25)0.46 (19)
I [0.22 mag]0.39 (15)0.57 (10)0.72 (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

Plot to assess correlation between bands for M33C-15731

Plot to assess correlation between bands for M33C-15731

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)
1.08 | 0.97
R
(I|R)
0.64 | 1.381.93 | 0.06
I
(I|R)
0.37 | 0.880.43 | 0.830.66 | 1.07

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