Color composite thumbnail image of V-024824V-024824 (J013307.57+304258.9)



Target Notes

Color composite thumbnail image of V-024824

Classification: peculiar

Unresolved from LGGS star J013307.63+304259.2 two magnitudes fainter in V and comparable brightness in BRI. Also difficult to separate from a pair of LGGS stars J013307.50+304258.5 A and B which are at least one magnitude brighter 1.4 arcseconds WSW.

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 16.90± 0.04BV-024824 in filter V on MJD  56140.390
---- 16.31± 0.08BV-024824 in filter R on MJD  56140.390
----
56593.16 17.29± 0.04BV-024824 in filter V on MJD  56593.160
17.20± 0.03BV-024824 in filter B on MJD  56593.160
--------
56599.19 17.28± 0.04BV-024824 in filter V on MJD  56599.190
17.21± 0.03BV-024824 in filter B on MJD  56599.190
17.09± 0.06BV-024824 in filter R on MJD  56599.190
----
56976.19 16.99± 0.04BV-024824 in filter V on MJD  56976.190
17.15± 0.04BV-024824 in filter B on MJD  56976.190
16.54± 0.06BV-024824 in filter R on MJD  56976.190
----
57328.16 17.10± 0.04BV-024824 in filter V on MJD  57328.160
17.20± 0.04BV-024824 in filter B on MJD  57328.160
16.59± 0.04BV-024824 in filter R on MJD  57328.160
----
57634.38 17.06± 0.04BV-024824 in filter V on MJD  57634.380
17.20± 0.05BV-024824 in filter B on MJD  57634.380
16.53± 0.06BV-024824 in filter R on MJD  57634.380
15.65± 0.09BV-024824 in filter I on MJD  57634.380
57964.40 16.91± 0.04BV-024824 in filter V on MJD  57964.400
-------- 15.24± 0.07ABV-024824 in filter I on MJD  57964.400
V-024824 in filter I on MJD  57964.400
57988.41 16.90± 0.05BV-024824 in filter V on MJD  57988.410
17.09± 0.04BV-024824 in filter B on MJD  57988.410
--------
58043.11 16.88± 0.04ABV-024824 in filter V on MJD  58043.110
V-024824 in filter V on MJD  58043.110
17.15± 0.03BV-024824 in filter B on MJD  58043.110
16.21± 0.04BV-024824 in filter R on MJD  58043.110
V-024824 in filter R on MJD  58043.110
15.23± 0.07BV-024824 in filter I on MJD  58043.110
58073.22 16.98± 0.05BV-024824 in filter V on MJD  58073.220
17.14± 0.05BV-024824 in filter B on MJD  58073.220
--------
58103.17 16.95± 0.05BV-024824 in filter V on MJD  58103.170
17.20± 0.04BV-024824 in filter B on MJD  58103.170
--------
58108.11 16.95± 0.04ABV-024824 in filter V on MJD  58108.110
V-024824 in filter V on MJD  58108.110
17.17± 0.05ABV-024824 in filter B on MJD  58108.110
V-024824 in filter B on MJD  58108.110
---- 15.30± 0.07ABV-024824 in filter I on MJD  58108.110
V-024824 in filter I on MJD  58108.110
58316.35 17.08± 0.06BV-024824 in filter V on MJD  58316.350
17.26± 0.04BV-024824 in filter B on MJD  58316.350
--------
58341.37 17.02± 0.05BV-024824 in filter V on MJD  58341.370
-------- 15.49± 0.08BV-024824 in filter I on MJD  58341.370
58373.15 16.91± 0.06BV-024824 in filter V on MJD  58373.150
17.22± 0.06BV-024824 in filter B on MJD  58373.150
--------
58433.02 16.88± 0.04BV-024824 in filter V on MJD  58433.020
---- 16.30± 0.05BV-024824 in filter R on MJD  58433.020
15.48± 0.08BV-024824 in filter I on MJD  58433.020
58673.38 17.02± 0.03BV-024824 in filter V on MJD  58673.380
17.26± 0.03BV-024824 in filter B on MJD  58673.380
--------
58750.19 16.97± 0.04BV-024824 in filter V on MJD  58750.190
---- 16.33± 0.05BV-024824 in filter R on MJD  58750.190
----
58779.18 16.81± 0.04BV-024824 in filter V on MJD  58779.180
17.10± 0.03BV-024824 in filter B on MJD  58779.180
--------
58812.20 16.90± 0.06BV-024824 in filter V on MJD  58812.200
---- 16.25± 0.06BV-024824 in filter R on MJD  58812.200
----
58902.05 16.96± 0.03BV-024824 in filter V on MJD  58902.050
-------- 15.37± 0.07BV-024824 in filter I on MJD  58902.050
59056.38 16.94± 0.04BV-024824 in filter V on MJD  59056.380
17.08± 0.06BV-024824 in filter B on MJD  59056.380
16.36± 0.05BV-024824 in filter R on MJD  59056.380
15.47± 0.07BV-024824 in filter I on MJD  59056.380
59082.32 17.08± 0.03BV-024824 in filter V on MJD  59082.320
17.29± 0.05BV-024824 in filter B on MJD  59082.320
16.46± 0.04BV-024824 in filter R on MJD  59082.320
----
59084.29-------- 16.44± 0.06TBV-024824 in filter R on MJD  59084.290
----
59161.11 17.14± 0.03BV-024824 in filter V on MJD  59161.110
17.16± 0.03BV-024824 in filter B on MJD  59161.110
16.50± 0.05BV-024824 in filter R on MJD  59161.110
----
59171.11 17.02± 0.03BV-024824 in filter V on MJD  59171.110
17.14± 0.03BV-024824 in filter B on MJD  59171.110
---- 15.49± 0.08BV-024824 in filter I on MJD  59171.110
59227.10 17.01± 0.03BV-024824 in filter V on MJD  59227.100
17.18± 0.03BV-024824 in filter B on MJD  59227.100
--------
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-024824Plot of color for V-024824

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 [0.21 mag]B [0.48 mag]R [0.88 mag]
B [0.21 mag]0.24 (19)
R [0.88 mag]0.83 (12)0.12 (8)
I [0.43 mag]0.51 (9)0.05 (5)0.87 (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 V-024824

Plot to assess correlation between bands for V-024824

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)
2.37 | 0.48
R
(I|R)
10.88 | 0.892.83 | 0.08
I
(I|R)
2.00 | 0.870.33 | 0.33--- | ----

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