Color composite thumbnail image of M33-5M33-5 (J013316.57+305250.2)



Target Notes

Color composite thumbnail image of M33-5

Classification: -

Khan et al. 2012. J013316.59+305249.9 of comparable brightness within one arc second. Four other stars one magnitude or fainter within 2 arc seconds.

Find In Simbad Query LGGS Massey (2016) at VizieR Query CAT WISE (Eisenhardt et al., 2020) at VizieR Query Gaia EDR3 (2020) at VizieR
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 16.65± 0.04-M33-5 in filter V on MJD  56140.390
---- 16.29± 0.16-M33-5 in filter R on MJD  56140.390
----
57988.41 16.60± 0.06-M33-5 in filter V on MJD  57988.410
17.75± 0.08-M33-5 in filter B on MJD  57988.410
--------
58043.10 16.45± 0.04-M33-5 in filter V on MJD  58043.100
---- 16.05± 0.04-M33-5 in filter R on MJD  58043.100
16.52± 0.07-M33-5 in filter I on MJD  58043.100
58103.17 16.48± 0.05-M33-5 in filter V on MJD  58103.170
17.32± 0.06-M33-5 in filter B on MJD  58103.170
--------
58108.14 16.56± 0.06-M33-5 in filter V on MJD  58108.140
17.24± 0.08-M33-5 in filter B on MJD  58108.140
---- 16.73± 0.09-M33-5 in filter I on MJD  58108.140
58317.39 17.42± 0.06XM33-5 in filter V on MJD  58317.390
---- 16.19± 0.07-M33-5 in filter R on MJD  58317.390
----
58341.40 16.57± 0.06-M33-5 in filter V on MJD  58341.400
17.43± 0.08-M33-5 in filter B on MJD  58341.400
16.25± 0.08-M33-5 in filter R on MJD  58341.400
16.75± 0.10-M33-5 in filter I on MJD  58341.400
58403.15 17.00± 0.06XM33-5 in filter V on MJD  58403.150
-------- 16.51± 0.09-M33-5 in filter I on MJD  58403.150
58696.39 16.74± 0.05-M33-5 in filter V on MJD  58696.390
17.28± 0.06-M33-5 in filter B on MJD  58696.390
16.35± 0.05-M33-5 in filter R on MJD  58696.390
----
58779.15 17.63± 0.06XM33-5 in filter V on MJD  58779.150
---- 16.07± 0.07-M33-5 in filter R on MJD  58779.150
16.19± 0.07-M33-5 in filter I on MJD  58779.150
58902.05 16.58± 0.04-M33-5 in filter V on MJD  58902.050
-------- 16.69± 0.08-M33-5 in filter I on MJD  58902.050
59056.38 16.58± 0.05-M33-5 in filter V on MJD  59056.380
17.24± 0.06-M33-5 in filter B on MJD  59056.380
16.23± 0.05-M33-5 in filter R on MJD  59056.380
16.73± 0.08-M33-5 in filter I on MJD  59056.380
59082.34 16.53± 0.04AM33-5 in filter V on MJD  59082.340
M33-5 in filter V on MJD  59082.340
17.16± 0.05AM33-5 in filter B on MJD  59082.340
M33-5 in filter B on MJD  59082.340
16.20± 0.05AM33-5 in filter R on MJD  59082.340
M33-5 in filter R on MJD  59082.340
----
59084.29-------- 16.14± 0.06TM33-5 in filter R on MJD  59084.290
----
59161.11 16.56± 0.03-M33-5 in filter V on MJD  59161.110
17.13± 0.03-M33-5 in filter B on MJD  59161.110
16.13± 0.04-M33-5 in filter R on MJD  59161.110
----
59171.09 16.54± 0.05AM33-5 in filter V on MJD  59171.090
M33-5 in filter V on MJD  59171.090
17.14± 0.06AM33-5 in filter B on MJD  59171.090
M33-5 in filter B on MJD  59171.090
16.09± 0.05-M33-5 in filter R on MJD  59171.090
16.72± 0.09AM33-5 in filter I on MJD  59171.090
M33-5 in filter I on MJD  59171.090
59227.08 16.60± 0.04AM33-5 in filter V on MJD  59227.080
M33-5 in filter V on MJD  59227.080
17.22± 0.05AM33-5 in filter B on MJD  59227.080
M33-5 in filter B on MJD  59227.080
16.25± 0.06-M33-5 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 M33-5Plot of color for M33-5

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 [0.62 mag]B [0.29 mag]R [0.30 mag]
B [0.62 mag]0.03 (10)
R [0.30 mag]0.78 (9)0.42 (7)
I [0.55 mag]0.82 (6)0.98 (4)0.39 (5)

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 M33-5

Plot to assess correlation between bands for M33-5

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)
0.72 | 2.11
R
(I|R)
2.66 | 0.81-3.09 | 0.08
I
(I|R)
1.12 | 0.97--- | --- 2.57 | 0.61

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