Color composite thumbnail image of M33C-14239M33C-14239 (J013248.23+303950.3 )



Target Notes

Color composite thumbnail image of M33C-14239

Classification: Fe_emission

(Candidate LBV) LGGS star J013248.23+303950.3 of comparable brightness resolved 2.5 arcseconds NW. Minimal concern when resolved.

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
56140.39 17.30± 0.05-M33C-14239 in filter V on MJD  56140.390
---- 16.97± 0.13-M33C-14239 in filter R on MJD  56140.390
----
56593.16 17.23± 0.05-M33C-14239 in filter V on MJD  56593.160
17.05± 0.03-M33C-14239 in filter B on MJD  56593.160
--------
56599.19 17.34± 0.05-M33C-14239 in filter V on MJD  56599.190
17.29± 0.05-M33C-14239 in filter B on MJD  56599.190
16.96± 0.06-M33C-14239 in filter R on MJD  56599.190
----
56976.19 17.27± 0.05-M33C-14239 in filter V on MJD  56976.190
17.21± 0.05-M33C-14239 in filter B on MJD  56976.190
17.00± 0.07-M33C-14239 in filter R on MJD  56976.190
----
57328.16 17.28± 0.03-M33C-14239 in filter V on MJD  57328.160
17.38± 0.04-M33C-14239 in filter B on MJD  57328.160
16.97± 0.04-M33C-14239 in filter R on MJD  57328.160
----
57406.10 17.40± 0.07-M33C-14239 in filter V on MJD  57406.100
17.21± 0.06-M33C-14239 in filter B on MJD  57406.100
16.84± 0.05-M33C-14239 in filter R on MJD  57406.100
16.88± 0.10-M33C-14239 in filter I on MJD  57406.100
57634.38 17.28± 0.05-M33C-14239 in filter V on MJD  57634.380
17.39± 0.05-M33C-14239 in filter B on MJD  57634.380
17.02± 0.07-M33C-14239 in filter R on MJD  57634.380
16.79± 0.10-M33C-14239 in filter I on MJD  57634.380
57964.40 17.42± 0.05-M33C-14239 in filter V on MJD  57964.400
-------- 16.93± 0.09AM33C-14239 in filter I on MJD  57964.400
M33C-14239 in filter I on MJD  57964.400
57988.42---- 17.46± 0.04TM33C-14239 in filter B on MJD  57988.420
--------
58043.11 17.25± 0.05AM33C-14239 in filter V on MJD  58043.110
M33C-14239 in filter V on MJD  58043.110
17.33± 0.05-M33C-14239 in filter B on MJD  58043.110
17.00± 0.05AM33C-14239 in filter R on MJD  58043.110
M33C-14239 in filter R on MJD  58043.110
16.82± 0.12-M33C-14239 in filter I on MJD  58043.110
58073.22 17.39± 0.06-M33C-14239 in filter V on MJD  58073.220
17.31± 0.06-M33C-14239 in filter B on MJD  58073.220
--------
58108.09 17.42± 0.05-M33C-14239 in filter V on MJD  58108.090
17.49± 0.05-M33C-14239 in filter B on MJD  58108.090
---- 16.97± 0.07-M33C-14239 in filter I on MJD  58108.090
58316.35 17.42± 0.06-M33C-14239 in filter V on MJD  58316.350
17.45± 0.04-M33C-14239 in filter B on MJD  58316.350
--------
58341.37 17.35± 0.05-M33C-14239 in filter V on MJD  58341.370
-------- 16.73± 0.09-M33C-14239 in filter I on MJD  58341.370
58373.15 17.28± 0.06-M33C-14239 in filter V on MJD  58373.150
17.49± 0.07-M33C-14239 in filter B on MJD  58373.150
--------
58433.02 17.34± 0.06-M33C-14239 in filter V on MJD  58433.020
---- 17.04± 0.06-M33C-14239 in filter R on MJD  58433.020
16.85± 0.11-M33C-14239 in filter I on MJD  58433.020
58673.38 17.32± 0.03-M33C-14239 in filter V on MJD  58673.380
17.42± 0.04-M33C-14239 in filter B on MJD  58673.380
--------
58695.39 17.30± 0.05-M33C-14239 in filter V on MJD  58695.390
---- 16.99± 0.04-M33C-14239 in filter R on MJD  58695.390
----
58750.20 17.30± 0.04AM33C-14239 in filter V on MJD  58750.200
M33C-14239 in filter V on MJD  58750.200
17.33± 0.03-M33C-14239 in filter B on MJD  58750.200
16.96± 0.05-M33C-14239 in filter R on MJD  58750.200
16.76± 0.08-M33C-14239 in filter I on MJD  58750.200
58779.18 17.61± 0.04-M33C-14239 in filter V on MJD  58779.180
17.73± 0.09-M33C-14239 in filter B on MJD  58779.180
--------
58784.14 17.24± 0.04-M33C-14239 in filter V on MJD  58784.140
---- 16.92± 0.05-M33C-14239 in filter R on MJD  58784.140
----
58812.20 17.30± 0.07-M33C-14239 in filter V on MJD  58812.200
---- 16.95± 0.07-M33C-14239 in filter R on MJD  58812.200
----
59059.40 17.31± 0.06-M33C-14239 in filter V on MJD  59059.400
---- 17.00± 0.05-M33C-14239 in filter R on MJD  59059.400
16.92± 0.09-M33C-14239 in filter I on MJD  59059.400
59081.30 17.33± 0.06-M33C-14239 in filter V on MJD  59081.300
17.39± 0.06-M33C-14239 in filter B on MJD  59081.300
17.00± 0.05-M33C-14239 in filter R on MJD  59081.300
----
59082.32 17.29± 0.03-M33C-14239 in filter V on MJD  59082.320
17.45± 0.05-M33C-14239 in filter B on MJD  59082.320
M33C-14239 in filter B on MJD  59082.320
16.98± 0.04-M33C-14239 in filter R on MJD  59082.320
M33C-14239 in filter R on MJD  59082.320
----
59084.25-------- 17.02± 0.04TM33C-14239 in filter R on MJD  59084.250
----
59161.12 17.26± 0.05AM33C-14239 in filter V on MJD  59161.120
M33C-14239 in filter V on MJD  59161.120
17.43± 0.07-M33C-14239 in filter B on MJD  59161.120
16.98± 0.05AM33C-14239 in filter R on MJD  59161.120
M33C-14239 in filter R on MJD  59161.120
16.85± 0.10-M33C-14239 in filter I on MJD  59161.120
59171.11 17.33± 0.05-M33C-14239 in filter V on MJD  59171.110
17.46± 0.04-M33C-14239 in filter B on MJD  59171.110
---- 16.90± 0.08-M33C-14239 in filter I on MJD  59171.110
59227.11 17.36± 0.04AM33C-14239 in filter V on MJD  59227.110
M33C-14239 in filter V on MJD  59227.110
17.40± 0.04AM33C-14239 in filter B on MJD  59227.110
M33C-14239 in filter B on MJD  59227.110
17.03± 0.05-M33C-14239 in filter R on MJD  59227.110
----
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-14239Plot of color for M33C-14239

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 [0.68 mag]B [0.37 mag]R [0.19 mag]
B [0.68 mag]0.35 (19)
R [0.19 mag]0.05 (17)0.31 (11)
I [0.23 mag]0.28 (11)0.18 (7)0.04 (7)

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-14239

Plot to assess correlation between bands for M33C-14239

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 | 1.63
R
(I|R)
-0.06 | 1.000.30 | 0.18
I
(I|R)
0.55 | 1.360.83 | 2.30-0.10 | 1.91

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