Color composite thumbnail image of M31-004350.50M31-004350.50 (J004350.50+414611.4)



Target Notes

Color composite thumbnail image of M31-004350.50

Classification: YSG

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 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
56142.33 17.71± 0.06TM31-004350.50 in filter V on MJD  56142.330
M31-004350.50 in filter V on MJD  56142.330
------------
56267.16-------- 17.18± 0.04TM31-004350.50 in filter R on MJD  56267.160
M31-004350.50 in filter R on MJD  56267.160
----
56490.35 17.75± 0.05-M31-004350.50 in filter V on MJD  56490.350
18.52± 0.06-M31-004350.50 in filter B on MJD  56490.350
--------
56536.22 17.72± 0.09-M31-004350.50 in filter V on MJD  56536.220
---- 17.22± 0.04-M31-004350.50 in filter R on MJD  56536.220
----
56537.22 17.65± 0.04-M31-004350.50 in filter V on MJD  56537.220
18.32± 0.04-M31-004350.50 in filter B on MJD  56537.220
17.15± 0.04-M31-004350.50 in filter R on MJD  56537.220
M31-004350.50 in filter R on MJD  56537.220
----
56593.08 17.74± 0.04-M31-004350.50 in filter V on MJD  56593.080
---- 17.26± 0.04-M31-004350.50 in filter R on MJD  56593.080
----
56923.11 17.65± 0.04-M31-004350.50 in filter V on MJD  56923.110
18.35± 0.05-M31-004350.50 in filter B on MJD  56923.110
17.20± 0.04-M31-004350.50 in filter R on MJD  56923.110
----
57227.36 17.63± 0.04-M31-004350.50 in filter V on MJD  57227.360
18.32± 0.04-M31-004350.50 in filter B on MJD  57227.360
--------
57314.12 17.72± 0.04-M31-004350.50 in filter V on MJD  57314.120
-------- 16.76± 0.04-M31-004350.50 in filter I on MJD  57314.120
57633.25 17.72± 0.05-M31-004350.50 in filter V on MJD  57633.250
18.37± 0.05-M31-004350.50 in filter B on MJD  57633.250
17.20± 0.04-M31-004350.50 in filter R on MJD  57633.250
----
57635.39 17.66± 0.06AM31-004350.50 in filter V on MJD  57635.390
M31-004350.50 in filter V on MJD  57635.390
18.38± 0.08-M31-004350.50 in filter B on MJD  57635.390
17.19± 0.07-M31-004350.50 in filter R on MJD  57635.390
16.69± 0.06AM31-004350.50 in filter I on MJD  57635.390
M31-004350.50 in filter I on MJD  57635.390
57958.35 17.69± 0.05-M31-004350.50 in filter V on MJD  57958.350
---- 17.18± 0.04-M31-004350.50 in filter R on MJD  57958.350
16.73± 0.04-M31-004350.50 in filter I on MJD  57958.350
57963.38 17.64± 0.04-M31-004350.50 in filter V on MJD  57963.380
18.43± 0.05-M31-004350.50 in filter B on MJD  57963.380
--------
58067.17 17.55± 0.04-M31-004350.50 in filter V on MJD  58067.170
-------- 16.57± 0.04-M31-004350.50 in filter I on MJD  58067.170
58312.35 17.60± 0.04-M31-004350.50 in filter V on MJD  58312.350
18.31± 0.05-M31-004350.50 in filter B on MJD  58312.350
--------
58341.28 17.64± 0.05-M31-004350.50 in filter V on MJD  58341.280
---- 17.16± 0.04-M31-004350.50 in filter R on MJD  58341.280
16.72± 0.04-M31-004350.50 in filter I on MJD  58341.280
58366.16 17.68± 0.05-M31-004350.50 in filter V on MJD  58366.160
18.36± 0.05-M31-004350.50 in filter B on MJD  58366.160
--------
58433.11 17.62± 0.05-M31-004350.50 in filter V on MJD  58433.110
18.36± 0.06-M31-004350.50 in filter B on MJD  58433.110
--------
58671.30 17.63± 0.04-M31-004350.50 in filter V on MJD  58671.300
18.35± 0.05-M31-004350.50 in filter B on MJD  58671.300
--------
58695.31 17.61± 0.03-M31-004350.50 in filter V on MJD  58695.310
---- 17.09± 0.04-M31-004350.50 in filter R on MJD  58695.310
16.64± 0.05-M31-004350.50 in filter I on MJD  58695.310
58750.10 17.56± 0.04-M31-004350.50 in filter V on MJD  58750.100
18.30± 0.03-M31-004350.50 in filter B on MJD  58750.100
--------
58779.07 17.58± 0.04-M31-004350.50 in filter V on MJD  58779.070
---- 17.09± 0.04-M31-004350.50 in filter R on MJD  58779.070
----
58836.18 17.63± 0.04-M31-004350.50 in filter V on MJD  58836.180
-------- 16.64± 0.05-M31-004350.50 in filter I on MJD  58836.180
59019.33 17.57± 0.05-M31-004350.50 in filter V on MJD  59019.330
18.33± 0.05-M31-004350.50 in filter B on MJD  59019.330
--------
59055.30 17.63± 0.04-M31-004350.50 in filter V on MJD  59055.300
---- 17.17± 0.03-M31-004350.50 in filter R on MJD  59055.300
16.68± 0.04-M31-004350.50 in filter I on MJD  59055.300
59082.20 17.65± 0.03-M31-004350.50 in filter V on MJD  59082.200
18.37± 0.04-M31-004350.50 in filter B on MJD  59082.200
17.19± 0.03-M31-004350.50 in filter R on MJD  59082.200
----
59131.07 17.63± 0.03-M31-004350.50 in filter V on MJD  59131.070
---- 17.17± 0.03-M31-004350.50 in filter R on MJD  59131.070
----
59166.09 17.60± 0.03-M31-004350.50 in filter V on MJD  59166.090
-------- 16.65± 0.04-M31-004350.50 in filter I on MJD  59166.090
59194.09 17.69± 0.03-M31-004350.50 in filter V on MJD  59194.090
18.43± 0.03-M31-004350.50 in filter B on MJD  59194.090
--------
59379.35 17.63± 0.04-M31-004350.50 in filter V on MJD  59379.350
---- 17.13± 0.04-M31-004350.50 in filter R on MJD  59379.350
----
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 M31-004350.50Plot of color for M31-004350.50

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 [0.22 mag]B [0.20 mag]R [0.17 mag]
B [0.22 mag]0.57 (15)
R [0.17 mag]0.75 (14)0.65 (5)
I [0.19 mag]0.87 (9)-.-- (1) 0.56 (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 M31-004350.50

Plot to assess correlation between bands for M31-004350.50

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)
1.06 | 1.07
R
(I|R)
1.03 | 0.87-1.85 | 0.01
I
(I|R)
1.46 | 0.85--- | --- 0.45 | 0.99

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