Color composite thumbnail image of V-025981V-025981 (J013308.99+302956.3 )



Target Notes

Color composite thumbnail image of V-025981

Classification: YSG

Unresolved from two LGGS stars of comparable brightness within 1 arcsecond.

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
56140.40 17.38± 0.06BV-025981 in filter V on MJD  56140.400
---- 17.30± 0.09BV-025981 in filter R on MJD  56140.400
----
56599.22 17.25± 0.06BV-025981 in filter V on MJD  56599.220
17.21± 0.05BV-025981 in filter B on MJD  56599.220
17.04± 0.05BV-025981 in filter R on MJD  56599.220
----
57035.14 17.25± 0.04BV-025981 in filter V on MJD  57035.140
17.14± 0.04BV-025981 in filter B on MJD  57035.140
16.97± 0.05BV-025981 in filter R on MJD  57035.140
----
57310.16 17.26± 0.05BV-025981 in filter V on MJD  57310.160
17.29± 0.04BV-025981 in filter B on MJD  57310.160
17.03± 0.05BV-025981 in filter R on MJD  57310.160
----
57406.10 17.23± 0.05BV-025981 in filter V on MJD  57406.100
17.26± 0.05BV-025981 in filter B on MJD  57406.100
17.10± 0.05BV-025981 in filter R on MJD  57406.100
16.80± 0.08BV-025981 in filter I on MJD  57406.100
57634.41 17.22± 0.07BV-025981 in filter V on MJD  57634.410
17.32± 0.08BV-025981 in filter B on MJD  57634.410
17.02± 0.08BV-025981 in filter R on MJD  57634.410
----
57638.40 17.39± 0.05ABV-025981 in filter V on MJD  57638.400
V-025981 in filter V on MJD  57638.400
17.46± 0.04BV-025981 in filter B on MJD  57638.400
17.18± 0.04BV-025981 in filter R on MJD  57638.400
17.04± 0.08ABV-025981 in filter I on MJD  57638.400
V-025981 in filter I on MJD  57638.400
57964.40 17.47± 0.04BV-025981 in filter V on MJD  57964.400
-------- 17.06± 0.07ABV-025981 in filter I on MJD  57964.400
V-025981 in filter I on MJD  57964.400
57988.43 17.30± 0.06TBV-025981 in filter V on MJD  57988.430
------------
58043.15 17.38± 0.04ABV-025981 in filter V on MJD  58043.150
V-025981 in filter V on MJD  58043.150
17.41± 0.05ABV-025981 in filter B on MJD  58043.150
V-025981 in filter B on MJD  58043.150
17.10± 0.05ABV-025981 in filter R on MJD  58043.150
V-025981 in filter R on MJD  58043.150
16.98± 0.10BV-025981 in filter I on MJD  58043.150
58073.22 17.30± 0.05BV-025981 in filter V on MJD  58073.220
17.45± 0.05BV-025981 in filter B on MJD  58073.220
--------
58108.13 17.38± 0.04ABV-025981 in filter V on MJD  58108.130
V-025981 in filter V on MJD  58108.130
17.44± 0.05ABV-025981 in filter B on MJD  58108.130
V-025981 in filter B on MJD  58108.130
---- 16.97± 0.08ABV-025981 in filter I on MJD  58108.130
V-025981 in filter I on MJD  58108.130
58316.35 17.32± 0.06BV-025981 in filter V on MJD  58316.350
17.56± 0.04BV-025981 in filter B on MJD  58316.350
--------
58339.40 17.36± 0.06BV-025981 in filter V on MJD  58339.400
17.39± 0.06BV-025981 in filter B on MJD  58339.400
17.12± 0.06BV-025981 in filter R on MJD  58339.400
----
58373.15 17.38± 0.06BV-025981 in filter V on MJD  58373.150
17.49± 0.07BV-025981 in filter B on MJD  58373.150
--------
58375.16 17.29± 0.05BV-025981 in filter V on MJD  58375.160
-------- 16.93± 0.10BV-025981 in filter I on MJD  58375.160
58433.02 17.40± 0.06BV-025981 in filter V on MJD  58433.020
---- 17.13± 0.05BV-025981 in filter R on MJD  58433.020
17.04± 0.09BV-025981 in filter I on MJD  58433.020
58673.38 17.33± 0.03BV-025981 in filter V on MJD  58673.380
17.50± 0.04BV-025981 in filter B on MJD  58673.380
--------
58695.39 17.36± 0.05BV-025981 in filter V on MJD  58695.390
---- 17.11± 0.04BV-025981 in filter R on MJD  58695.390
----
58696.41 17.40± 0.05BV-025981 in filter V on MJD  58696.410
17.40± 0.07BV-025981 in filter B on MJD  58696.410
17.10± 0.07BV-025981 in filter R on MJD  58696.410
V-025981 in filter R on MJD  58696.410
----
58750.20 17.30± 0.04ABV-025981 in filter V on MJD  58750.200
V-025981 in filter V on MJD  58750.200
17.48± 0.03BV-025981 in filter B on MJD  58750.200
16.98± 0.05BV-025981 in filter R on MJD  58750.200
17.03± 0.08BV-025981 in filter I on MJD  58750.200
58757.17 17.34± 0.06BV-025981 in filter V on MJD  58757.170
---- 17.10± 0.05BV-025981 in filter R on MJD  58757.170
----
58779.18 17.51± 0.04TBV-025981 in filter V on MJD  58779.180
> 19.03XV-025981 in filter B on MJD  58779.180
--------
58784.14 17.37± 0.05ABV-025981 in filter V on MJD  58784.140
V-025981 in filter V on MJD  58784.140
---- 17.15± 0.05BV-025981 in filter R on MJD  58784.140
16.98± 0.08BV-025981 in filter I on MJD  58784.140
58812.20 17.37± 0.06BV-025981 in filter V on MJD  58812.200
---- 17.10± 0.07BV-025981 in filter R on MJD  58812.200
----
59059.40 17.39± 0.06BV-025981 in filter V on MJD  59059.400
---- 17.16± 0.05BV-025981 in filter R on MJD  59059.400
17.03± 0.09BV-025981 in filter I on MJD  59059.400
59081.34 17.38± 0.06ABV-025981 in filter V on MJD  59081.340
V-025981 in filter V on MJD  59081.340
17.45± 0.05ABV-025981 in filter B on MJD  59081.340
V-025981 in filter B on MJD  59081.340
17.12± 0.05ABV-025981 in filter R on MJD  59081.340
V-025981 in filter R on MJD  59081.340
16.99± 0.08BV-025981 in filter I on MJD  59081.340
59082.38 17.40± 0.06BV-025981 in filter V on MJD  59082.380
17.50± 0.03BV-025981 in filter B on MJD  59082.380
V-025981 in filter B on MJD  59082.380
V-025981 in filter B on MJD  59082.380
17.16± 0.05BV-025981 in filter R on MJD  59082.380
V-025981 in filter R on MJD  59082.380
V-025981 in filter R on MJD  59082.380
----
59084.25-------- 17.11± 0.04TBV-025981 in filter R on MJD  59084.250
----
59161.14 17.44± 0.06BV-025981 in filter V on MJD  59161.140
---- 17.15± 0.05BV-025981 in filter R on MJD  59161.140
16.98± 0.09BV-025981 in filter I on MJD  59161.140
59171.15 17.31± 0.06ABV-025981 in filter V on MJD  59171.150
V-025981 in filter V on MJD  59171.150
17.39± 0.07ABV-025981 in filter B on MJD  59171.150
V-025981 in filter B on MJD  59171.150
17.08± 0.05BV-025981 in filter R on MJD  59171.150
16.98± 0.08ABV-025981 in filter I on MJD  59171.150
V-025981 in filter I on MJD  59171.150
59227.14 17.35± 0.05ABV-025981 in filter V on MJD  59227.140
V-025981 in filter V on MJD  59227.140
17.41± 0.05ABV-025981 in filter B on MJD  59227.140
V-025981 in filter B on MJD  59227.140
17.12± 0.05ABV-025981 in filter R on MJD  59227.140
V-025981 in filter R on MJD  59227.140
16.91± 0.08BV-025981 in filter I on MJD  59227.140
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 V-025981Plot of color for V-025981

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 [0.42 mag]B [0.29 mag]R [0.33 mag]
B [0.42 mag]0.50 (19)
R [0.33 mag]0.47 (22)0.35 (14)
I [0.26 mag]0.55 (14)0.87 (8)0.01 (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 V-025981

Plot to assess correlation between bands for V-025981

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)
1.95 | 1.88
R
(I|R)
1.09 | 1.111.82 | 0.35
I
(I|R)
0.76 | 1.791.23 | 1.420.09 | 1.32

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