Color composite thumbnail image of M33C-25255M33C-25255 (J013317.05+305329.9)



Target Notes

Color composite thumbnail image of M33C-25255

Classification: Fe_emission

(Candidate LBV) No blend concerns.

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
57988.41 19.11± 0.07-M33C-25255 in filter V on MJD  57988.410
19.18± 0.08-M33C-25255 in filter B on MJD  57988.410
--------
58043.10 19.26± 0.09-M33C-25255 in filter V on MJD  58043.100
---- 18.99± 0.09-M33C-25255 in filter R on MJD  58043.100
18.69± 0.15-M33C-25255 in filter I on MJD  58043.100
58103.17 19.22± 0.08-M33C-25255 in filter V on MJD  58103.170
19.23± 0.07-M33C-25255 in filter B on MJD  58103.170
--------
58108.14 19.15± 0.09-M33C-25255 in filter V on MJD  58108.140
19.23± 0.10-M33C-25255 in filter B on MJD  58108.140
---- 18.63± 0.12-M33C-25255 in filter I on MJD  58108.140
58317.39 19.10± 0.10-M33C-25255 in filter V on MJD  58317.390
---- 18.68± 0.09-M33C-25255 in filter R on MJD  58317.390
----
58341.40 19.15± 0.08-M33C-25255 in filter V on MJD  58341.400
19.28± 0.11-M33C-25255 in filter B on MJD  58341.400
18.84± 0.09-M33C-25255 in filter R on MJD  58341.400
18.56± 0.12-M33C-25255 in filter I on MJD  58341.400
58403.15 19.34± 0.11-M33C-25255 in filter V on MJD  58403.150
-------- 19.18± 0.24-M33C-25255 in filter I on MJD  58403.150
58696.39 18.95± 0.05-M33C-25255 in filter V on MJD  58696.390
18.96± 0.07-M33C-25255 in filter B on MJD  58696.390
18.70± 0.05-M33C-25255 in filter R on MJD  58696.390
----
58779.15 19.29± 0.10-M33C-25255 in filter V on MJD  58779.150
---- 19.16± 0.09-M33C-25255 in filter R on MJD  58779.150
> 18.37-M33C-25255 in filter I on MJD  58779.150
58902.05 19.21± 0.06-M33C-25255 in filter V on MJD  58902.050
-------- 18.61± 0.11-M33C-25255 in filter I on MJD  58902.050
59056.38 19.04± 0.06-M33C-25255 in filter V on MJD  59056.380
19.20± 0.09-M33C-25255 in filter B on MJD  59056.380
18.74± 0.06-M33C-25255 in filter R on MJD  59056.380
18.71± 0.12-M33C-25255 in filter I on MJD  59056.380
59082.35 19.12± 0.06-M33C-25255 in filter V on MJD  59082.350
19.15± 0.07-M33C-25255 in filter B on MJD  59082.350
18.67± 0.06-M33C-25255 in filter R on MJD  59082.350
----
59084.29-------- 18.73± 0.06TM33C-25255 in filter R on MJD  59084.290
----
59161.11 19.22± 0.07-M33C-25255 in filter V on MJD  59161.110
19.50± 0.08-M33C-25255 in filter B on MJD  59161.110
18.91± 0.07-M33C-25255 in filter R on MJD  59161.110
----
59171.07 19.35± 0.11-M33C-25255 in filter V on MJD  59171.070
19.31± 0.10-M33C-25255 in filter B on MJD  59171.070
19.26± 0.10-M33C-25255 in filter R on MJD  59171.070
18.82± 0.15-M33C-25255 in filter I on MJD  59171.070
59227.08 19.08± 0.05AM33C-25255 in filter V on MJD  59227.080
M33C-25255 in filter V on MJD  59227.080
19.16± 0.07AM33C-25255 in filter B on MJD  59227.080
M33C-25255 in filter B on MJD  59227.080
18.78± 0.06-M33C-25255 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-25255Plot of color for M33C-25255

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 [0.54 mag]B [0.39 mag]R [0.59 mag]
B [0.54 mag]0.56 (10)
R [0.59 mag]0.80 (10)0.30 (7)
I [0.62 mag]0.39 (7)0.07 (4)0.50 (4)

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-25255

Plot to assess correlation between bands for M33C-25255

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)
2.12 | 0.96
R
(I|R)
3.18 | 0.673.45 | 0.24
I
(I|R)
0.62 | 1.42--- | --- --- | ----

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