Color composite thumbnail image of M31-004507.65M31-004507.65 (J004507.65+413740.8)



Target Notes

Color composite thumbnail image of M31-004507.65

Classification: YSG

Not resolved from LGGS star J004507.64+413740.4 less than 0.5 arcseconds W. According to LGGS it has odd colors with comparable brightness in B and R but contributes -0.07 magntudes in V.

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 Kaluzny et al. (1998) M31 Survey at VizieR
Query POINT-AGAPE An et al. (2004) M31 Survey at VizieR


Photometry Table

Download table (txt) Key to Flags in Table Key For Images Plot/Graph Variability
MJDV*ImageB*ImageR*ImagesI*Images
56142.32 16.21± 0.04TbM31-004507.65 in filter V on MJD  56142.320
------------
56267.15-------- 15.91± 0.03TBM31-004507.65 in filter R on MJD  56267.150
----
56490.37 16.22± 0.04bM31-004507.65 in filter V on MJD  56490.370
16.50± 0.05BM31-004507.65 in filter B on MJD  56490.370
--------
56536.24 16.14± 0.03bM31-004507.65 in filter V on MJD  56536.240
---- 15.90± 0.04BM31-004507.65 in filter R on MJD  56536.240
----
56915.13 16.15± 0.03bM31-004507.65 in filter V on MJD  56915.130
16.44± 0.04BM31-004507.65 in filter B on MJD  56915.130
15.92± 0.04BM31-004507.65 in filter R on MJD  56915.130
----
57227.31 16.11± 0.03bM31-004507.65 in filter V on MJD  57227.310
16.43± 0.04BM31-004507.65 in filter B on MJD  57227.310
15.87± 0.04BM31-004507.65 in filter R on MJD  57227.310
----
57310.08 16.16± 0.03bM31-004507.65 in filter V on MJD  57310.080
-------- 15.71± 0.05BM31-004507.65 in filter I on MJD  57310.080
57633.32 16.12± 0.04AbM31-004507.65 in filter V on MJD  57633.320
M31-004507.65 in filter V on MJD  57633.320
16.41± 0.04ABM31-004507.65 in filter B on MJD  57633.320
M31-004507.65 in filter B on MJD  57633.320
15.89± 0.04ABM31-004507.65 in filter R on MJD  57633.320
M31-004507.65 in filter R on MJD  57633.320
----
57638.28 16.09± 0.04AbM31-004507.65 in filter V on MJD  57638.280
M31-004507.65 in filter V on MJD  57638.280
-------- 15.62± 0.05ABM31-004507.65 in filter I on MJD  57638.280
M31-004507.65 in filter I on MJD  57638.280
57928.37 16.09± 0.03bM31-004507.65 in filter V on MJD  57928.370
16.38± 0.04BM31-004507.65 in filter B on MJD  57928.370
15.84± 0.04BM31-004507.65 in filter R on MJD  57928.370
15.59± 0.06BM31-004507.65 in filter I on MJD  57928.370
57958.29 16.14± 0.04bM31-004507.65 in filter V on MJD  57958.290
16.43± 0.04BM31-004507.65 in filter B on MJD  57958.290
---- 15.67± 0.04BM31-004507.65 in filter I on MJD  57958.290
58043.06 16.25± 0.03bM31-004507.65 in filter V on MJD  58043.060
16.54± 0.04BM31-004507.65 in filter B on MJD  58043.060
---- 15.79± 0.05BM31-004507.65 in filter I on MJD  58043.060
58098.09 16.18± 0.04bM31-004507.65 in filter V on MJD  58098.090
16.47± 0.03BM31-004507.65 in filter B on MJD  58098.090
15.95± 0.03ABM31-004507.65 in filter R on MJD  58098.090
M31-004507.65 in filter R on MJD  58098.090
----
58312.29 16.16± 0.04bM31-004507.65 in filter V on MJD  58312.290
16.48± 0.04BM31-004507.65 in filter B on MJD  58312.290
15.93± 0.04BM31-004507.65 in filter R on MJD  58312.290
----
58316.26 16.16± 0.04bM31-004507.65 in filter V on MJD  58316.260
-------- 15.67± 0.04BM31-004507.65 in filter I on MJD  58316.260
58341.23 16.13± 0.05bM31-004507.65 in filter V on MJD  58341.230
16.43± 0.05BM31-004507.65 in filter B on MJD  58341.230
--------
58366.12 16.18± 0.03bM31-004507.65 in filter V on MJD  58366.120
16.47± 0.04BM31-004507.65 in filter B on MJD  58366.120
--------
58375.12 16.21± 0.04bM31-004507.65 in filter V on MJD  58375.120
---- 15.97± 0.03BM31-004507.65 in filter R on MJD  58375.120
----
58403.08 16.21± 0.03bM31-004507.65 in filter V on MJD  58403.080
-------- 15.77± 0.05BM31-004507.65 in filter I on MJD  58403.080
58671.38 16.17± 0.04bM31-004507.65 in filter V on MJD  58671.380
16.48± 0.03BM31-004507.65 in filter B on MJD  58671.380
--------
58695.34 16.16± 0.05bM31-004507.65 in filter V on MJD  58695.340
---- 15.94± 0.04BM31-004507.65 in filter R on MJD  58695.340
15.74± 0.04BM31-004507.65 in filter I on MJD  58695.340
58750.13 16.16± 0.04bM31-004507.65 in filter V on MJD  58750.130
16.44± 0.03BM31-004507.65 in filter B on MJD  58750.130
--------
58779.10 16.24± 0.04bM31-004507.65 in filter V on MJD  58779.100
---- 15.98± 0.03BM31-004507.65 in filter R on MJD  58779.100
----
58812.08 16.11± 0.04bM31-004507.65 in filter V on MJD  58812.080
-------- 15.65± 0.04BM31-004507.65 in filter I on MJD  58812.080
59001.39 16.29± 0.03bM31-004507.65 in filter V on MJD  59001.390
---- 16.04± 0.04BM31-004507.65 in filter R on MJD  59001.390
----
59059.31 16.19± 0.03bM31-004507.65 in filter V on MJD  59059.310
16.49± 0.03BM31-004507.65 in filter B on MJD  59059.310
15.97± 0.04BM31-004507.65 in filter R on MJD  59059.310
----
59081.22 16.09± 0.04bM31-004507.65 in filter V on MJD  59081.220
-------- 15.64± 0.05BM31-004507.65 in filter I on MJD  59081.220
59136.11 16.18± 0.03bM31-004507.65 in filter V on MJD  59136.110
16.48± 0.03BM31-004507.65 in filter B on MJD  59136.110
15.95± 0.03BM31-004507.65 in filter R on MJD  59136.110
----
59166.25 16.20± 0.03bM31-004507.65 in filter V on MJD  59166.250
-------- 15.74± 0.05BM31-004507.65 in filter I on MJD  59166.250
59380.36 16.26± 0.03bM31-004507.65 in filter V on MJD  59380.360
---- 16.08± 0.04bM31-004507.65 in filter R on MJD  59380.360
----
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 M31-004507.65Plot of color for M31-004507.65

Key for Plot Variability Photometry Table Target Notes


Variability

Plot/Graph Photometry Table Target Notes

It is very 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 [0.16 mag]B [0.20 mag]R [0.24 mag]
B [0.16 mag]0.93 (15)
R [0.24 mag]0.91 (14)0.92 (8)
I [0.20 mag]0.89 (11)0.99 (3)-.-- (2)

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 M31-004507.65

Plot to assess correlation between bands for M31-004507.65

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)
1.25 | 0.94
R
(I|R)
2.55 | 0.991.42 | 0.06
I
(I|R)
1.86 | 1.09--- | --- --- | ----

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