Color composite thumbnail image of M31-004034.82M31-004034.82 (J004034.82+401825.5)



Target Notes

Color composite thumbnail image of M31-004034.82

Classification: -

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
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
56604.11 16.29± 0.03-M31-004034.82 in filter V on MJD  56604.110
16.90± 0.03-M31-004034.82 in filter B on MJD  56604.110
15.86± 0.04-M31-004034.82 in filter R on MJD  56604.110
----
56930.16 16.30± 0.03-M31-004034.82 in filter V on MJD  56930.160
16.92± 0.04-M31-004034.82 in filter B on MJD  56930.160
15.87± 0.04-M31-004034.82 in filter R on MJD  56930.160
----
56951.10 16.35± 0.03-M31-004034.82 in filter V on MJD  56951.100
16.95± 0.03-M31-004034.82 in filter B on MJD  56951.100
15.94± 0.04-M31-004034.82 in filter R on MJD  56951.100
----
57307.14 16.35± 0.04AM31-004034.82 in filter V on MJD  57307.140
M31-004034.82 in filter V on MJD  57307.140
16.93± 0.03AM31-004034.82 in filter B on MJD  57307.140
M31-004034.82 in filter B on MJD  57307.140
15.92± 0.04AM31-004034.82 in filter R on MJD  57307.140
M31-004034.82 in filter R on MJD  57307.140
----
57340.22 16.36± 0.05-M31-004034.82 in filter V on MJD  57340.220
-------- 15.49± 0.07-M31-004034.82 in filter I on MJD  57340.220
57634.30---- 16.98± 0.04TM31-004034.82 in filter B on MJD  57634.300
15.93± 0.06TM31-004034.82 in filter R on MJD  57634.300
----
57638.23 16.37± 0.05-M31-004034.82 in filter V on MJD  57638.230
16.99± 0.05-M31-004034.82 in filter B on MJD  57638.230
15.96± 0.06-M31-004034.82 in filter R on MJD  57638.230
15.52± 0.07-M31-004034.82 in filter I on MJD  57638.230
57963.35 16.34± 0.04-M31-004034.82 in filter V on MJD  57963.350
16.96± 0.03-M31-004034.82 in filter B on MJD  57963.350
---- 15.51± 0.07-M31-004034.82 in filter I on MJD  57963.350
58035.07 16.32± 0.05-M31-004034.82 in filter V on MJD  58035.070
---- 15.89± 0.06-M31-004034.82 in filter R on MJD  58035.070
----
58077.14 16.34± 0.04-M31-004034.82 in filter V on MJD  58077.140
16.98± 0.03-M31-004034.82 in filter B on MJD  58077.140
---- 15.50± 0.07-M31-004034.82 in filter I on MJD  58077.140
58317.33 16.33± 0.04-M31-004034.82 in filter V on MJD  58317.330
-------- 15.49± 0.07-M31-004034.82 in filter I on MJD  58317.330
58339.32 16.34± 0.04-M31-004034.82 in filter V on MJD  58339.320
16.95± 0.04-M31-004034.82 in filter B on MJD  58339.320
15.92± 0.05-M31-004034.82 in filter R on MJD  58339.320
----
58373.13 16.32± 0.05-M31-004034.82 in filter V on MJD  58373.130
16.91± 0.04-M31-004034.82 in filter B on MJD  58373.130
--------
58672.36 16.29± 0.04-M31-004034.82 in filter V on MJD  58672.360
---- 15.87± 0.04-M31-004034.82 in filter R on MJD  58672.360
15.45± 0.05-M31-004034.82 in filter I on MJD  58672.360
58695.27 16.31± 0.03-M31-004034.82 in filter V on MJD  58695.270
16.94± 0.04-M31-004034.82 in filter B on MJD  58695.270
--------
58779.11 16.30± 0.03-M31-004034.82 in filter V on MJD  58779.110
---- 15.88± 0.03-M31-004034.82 in filter R on MJD  58779.110
----
59026.34 16.29± 0.04AM31-004034.82 in filter V on MJD  59026.340
M31-004034.82 in filter V on MJD  59026.340
---- 15.89± 0.05-M31-004034.82 in filter R on MJD  59026.340
----
59059.29 16.30± 0.03-M31-004034.82 in filter V on MJD  59059.290
16.93± 0.04-M31-004034.82 in filter B on MJD  59059.290
---- 15.46± 0.06-M31-004034.82 in filter I on MJD  59059.290
59082.29 16.29± 0.04-M31-004034.82 in filter V on MJD  59082.290
16.93± 0.04-M31-004034.82 in filter B on MJD  59082.290
15.88± 0.05-M31-004034.82 in filter R on MJD  59082.290
----
59131.15 16.29± 0.04-M31-004034.82 in filter V on MJD  59131.150
---- 15.88± 0.05-M31-004034.82 in filter R on MJD  59131.150
----
59166.21 16.29± 0.03-M31-004034.82 in filter V on MJD  59166.210
-------- 15.46± 0.06-M31-004034.82 in filter I on MJD  59166.210
59194.16 16.28± 0.03-M31-004034.82 in filter V on MJD  59194.160
16.92± 0.03-M31-004034.82 in filter B on MJD  59194.160
--------
59380.34 16.31± 0.04-M31-004034.82 in filter V on MJD  59380.340
16.92± 0.04-M31-004034.82 in filter B on MJD  59380.340
--------
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 M31-004034.82Plot of color for M31-004034.82

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 [0.09 mag]B [0.09 mag]R [0.10 mag]
B [0.09 mag]0.57 (14)
R [0.10 mag]0.88 (12)0.79 (8)
I [0.06 mag]0.85 (8)0.79 (4)-.-- (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 M31-004034.82

Plot to assess correlation between bands for M31-004034.82

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)
0.40 | 0.78
R
(I|R)
0.48 | 1.391.90 | 0.03
I
(I|R)
0.28 | 2.13--- | --- --- | ----

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