Color composite thumbnail image of M33-013446.93M33-013446.93 (J013446.93+305426.5)



Target Notes

Color composite thumbnail image of M33-013446.93

Classification: YSG

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
57638.35 18.26± 0.04-M33-013446.93 in filter V on MJD  57638.350
18.36± 0.06-M33-013446.93 in filter B on MJD  57638.350
18.16± 0.05-M33-013446.93 in filter R on MJD  57638.350
17.88± 0.08-M33-013446.93 in filter I on MJD  57638.350
57964.37 18.24± 0.04-M33-013446.93 in filter V on MJD  57964.370
18.33± 0.06-M33-013446.93 in filter B on MJD  57964.370
18.07± 0.05-M33-013446.93 in filter R on MJD  57964.370
17.93± 0.07-M33-013446.93 in filter I on MJD  57964.370
58045.15 18.16± 0.07-M33-013446.93 in filter V on MJD  58045.150
18.30± 0.08-M33-013446.93 in filter B on MJD  58045.150
18.10± 0.05-M33-013446.93 in filter R on MJD  58045.150
----
58073.18 18.28± 0.04-M33-013446.93 in filter V on MJD  58073.180
18.27± 0.07-M33-013446.93 in filter B on MJD  58073.180
--------
58103.14 18.28± 0.04-M33-013446.93 in filter V on MJD  58103.140
-------- 18.00± 0.09-M33-013446.93 in filter I on MJD  58103.140
58316.38 18.31± 0.04-M33-013446.93 in filter V on MJD  58316.380
18.40± 0.06-M33-013446.93 in filter B on MJD  58316.380
18.16± 0.04-M33-013446.93 in filter R on MJD  58316.380
18.14± 0.07-M33-013446.93 in filter I on MJD  58316.380
58342.36 18.24± 0.04-M33-013446.93 in filter V on MJD  58342.360
18.27± 0.07-M33-013446.93 in filter B on MJD  58342.360
18.06± 0.04-M33-013446.93 in filter R on MJD  58342.360
17.90± 0.07-M33-013446.93 in filter I on MJD  58342.360
58420.06 18.31± 0.05-M33-013446.93 in filter V on MJD  58420.060
18.36± 0.07-M33-013446.93 in filter B on MJD  58420.060
18.16± 0.05-M33-013446.93 in filter R on MJD  58420.060
17.82± 0.09-M33-013446.93 in filter I on MJD  58420.060
58696.39 18.34± 0.04-M33-013446.93 in filter V on MJD  58696.390
18.39± 0.06-M33-013446.93 in filter B on MJD  58696.390
18.19± 0.05-M33-013446.93 in filter R on MJD  58696.390
----
58779.15 18.39± 0.06-M33-013446.93 in filter V on MJD  58779.150
---- 18.12± 0.06-M33-013446.93 in filter R on MJD  58779.150
18.29± 0.11-M33-013446.93 in filter I on MJD  58779.150
59081.33 18.27± 0.04-M33-013446.93 in filter V on MJD  59081.330
18.36± 0.06-M33-013446.93 in filter B on MJD  59081.330
18.16± 0.03-M33-013446.93 in filter R on MJD  59081.330
----
59082.35 18.34± 0.04-M33-013446.93 in filter V on MJD  59082.350
18.42± 0.07-M33-013446.93 in filter B on MJD  59082.350
M33-013446.93 in filter B on MJD  59082.350
18.20± 0.06-M33-013446.93 in filter R on MJD  59082.350
M33-013446.93 in filter R on MJD  59082.350
----
59171.07 18.41± 0.07-M33-013446.93 in filter V on MJD  59171.070
18.56± 0.07-M33-013446.93 in filter B on MJD  59171.070
18.21± 0.06-M33-013446.93 in filter R on MJD  59171.070
18.12± 0.10-M33-013446.93 in filter I on MJD  59171.070
59227.06 18.32± 0.04-M33-013446.93 in filter V on MJD  59227.060
18.38± 0.06-M33-013446.93 in filter B on MJD  59227.060
18.20± 0.05-M33-013446.93 in filter R on MJD  59227.060
----
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 M33-013446.93Plot of color for M33-013446.93

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 [0.29 mag]B [0.25 mag]R [0.16 mag]
B [0.29 mag]0.67 (12)
R [0.16 mag]0.41 (12)0.60 (11)
I [0.47 mag]0.55 (8)0.47 (6)0.06 (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 M33-013446.93

Plot to assess correlation between bands for M33-013446.93

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)
0.95 | 0.77
R
(I|R)
0.84 | 1.281.02 | 0.15
I
(I|R)
1.50 | 0.661.32 | 0.660.69 | 0.55

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