Color composite thumbnail image of M31-004337.16M31-004337.16 (J004337.16+412151.0)



Target Notes

Color composite thumbnail image of M31-004337.16

Classification: YSG

Seven LGGS stars >4 magniutdes fainter with 5 arcseconds.

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 17.15± 0.06TbM31-004337.16 in filter V on MJD  56142.330
------------
56267.14-------- 16.56± 0.05TbM31-004337.16 in filter R on MJD  56267.140
----
56490.38 17.06± 0.04TbM31-004337.16 in filter V on MJD  56490.380
------------
56536.26 16.99± 0.05bM31-004337.16 in filter V on MJD  56536.260
---- 16.52± 0.06bM31-004337.16 in filter R on MJD  56536.260
----
56537.20 17.03± 0.05bM31-004337.16 in filter V on MJD  56537.200
17.92± 0.07bM31-004337.16 in filter B on MJD  56537.200
--------
56599.08 16.94± 0.03bM31-004337.16 in filter V on MJD  56599.080
17.85± 0.06bM31-004337.16 in filter B on MJD  56599.080
16.44± 0.03bM31-004337.16 in filter R on MJD  56599.080
----
56915.16 17.05± 0.04bM31-004337.16 in filter V on MJD  56915.160
18.00± 0.06bM31-004337.16 in filter B on MJD  56915.160
16.55± 0.05bM31-004337.16 in filter R on MJD  56915.160
----
57227.34 16.96± 0.04bM31-004337.16 in filter V on MJD  57227.340
17.97± 0.05bM31-004337.16 in filter B on MJD  57227.340
16.43± 0.04bM31-004337.16 in filter R on MJD  57227.340
----
57310.10 16.90± 0.03bM31-004337.16 in filter V on MJD  57310.100
-------- 16.10± 0.06bM31-004337.16 in filter I on MJD  57310.100
57633.33 17.01± 0.06bM31-004337.16 in filter V on MJD  57633.330
18.01± 0.07bM31-004337.16 in filter B on MJD  57633.330
16.53± 0.05bM31-004337.16 in filter R on MJD  57633.330
----
57635.35 17.00± 0.05bM31-004337.16 in filter V on MJD  57635.350
-------- 16.13± 0.06bM31-004337.16 in filter I on MJD  57635.350
57887.90 16.93± 0.07XM31-004337.16 in filter V on MJD  57887.900
17.84± 0.18XM31-004337.16 in filter B on MJD  57887.900
--------
57928.32 16.97± 0.05bM31-004337.16 in filter V on MJD  57928.320
17.87± 0.07bM31-004337.16 in filter B on MJD  57928.320
16.48± 0.06bM31-004337.16 in filter R on MJD  57928.320
16.11± 0.08bM31-004337.16 in filter I on MJD  57928.320
57958.26 16.98± 0.06bM31-004337.16 in filter V on MJD  57958.260
17.89± 0.08bM31-004337.16 in filter B on MJD  57958.260
---- 16.10± 0.06-M31-004337.16 in filter I on MJD  57958.260
57963.26 16.97± 0.06bM31-004337.16 in filter V on MJD  57963.260
17.91± 0.07bM31-004337.16 in filter B on MJD  57963.260
--------
57988.22 16.99± 0.07bM31-004337.16 in filter V on MJD  57988.220
17.91± 0.08bM31-004337.16 in filter B on MJD  57988.220
---- 16.07± 0.06bM31-004337.16 in filter I on MJD  57988.220
58035.03 16.94± 0.04bM31-004337.16 in filter V on MJD  58035.030
---- 16.49± 0.04bM31-004337.16 in filter R on MJD  58035.030
----
58043.05 16.90± 0.05bM31-004337.16 in filter V on MJD  58043.050
17.81± 0.06bM31-004337.16 in filter B on MJD  58043.050
16.43± 0.04bM31-004337.16 in filter R on MJD  58043.050
----
58045.05 16.92± 0.05bM31-004337.16 in filter V on MJD  58045.050
-------- 16.11± 0.07bM31-004337.16 in filter I on MJD  58045.050
58067.10 16.97± 0.05bM31-004337.16 in filter V on MJD  58067.100
-------- 16.07± 0.06bM31-004337.16 in filter I on MJD  58067.100
58073.09 16.98± 0.06bM31-004337.16 in filter V on MJD  58073.090
18.00± 0.08bM31-004337.16 in filter B on MJD  58073.090
--------
58077.08 17.04± 0.08bM31-004337.16 in filter V on MJD  58077.080
-------- 16.05± 0.07bM31-004337.16 in filter I on MJD  58077.080
58098.07 17.09± 0.06bM31-004337.16 in filter V on MJD  58098.070
18.07± 0.08bM31-004337.16 in filter B on MJD  58098.070
--------
58103.08 17.12± 0.05bM31-004337.16 in filter V on MJD  58103.080
-------- 16.18± 0.07bM31-004337.16 in filter I on MJD  58103.080
58312.26 17.07± 0.06bM31-004337.16 in filter V on MJD  58312.260
18.14± 0.08bM31-004337.16 in filter B on MJD  58312.260
16.55± 0.06bM31-004337.16 in filter R on MJD  58312.260
----
58316.24 17.07± 0.06bM31-004337.16 in filter V on MJD  58316.240
-------- 16.14± 0.06bM31-004337.16 in filter I on MJD  58316.240
58339.26 16.96± 0.06bM31-004337.16 in filter V on MJD  58339.260
-------- 16.08± 0.07bM31-004337.16 in filter I on MJD  58339.260
58342.26 16.98± 0.04bM31-004337.16 in filter V on MJD  58342.260
17.95± 0.07bM31-004337.16 in filter B on MJD  58342.260
--------
58366.11 16.89± 0.04bM31-004337.16 in filter V on MJD  58366.110
17.65± 0.06bM31-004337.16 in filter B on MJD  58366.110
--------
58375.09 16.84± 0.04bM31-004337.16 in filter V on MJD  58375.090
---- 16.32± 0.04bM31-004337.16 in filter R on MJD  58375.090
----
58403.06 16.88± 0.03bM31-004337.16 in filter V on MJD  58403.060
-------- 16.03± 0.05bM31-004337.16 in filter I on MJD  58403.060
58420.01 16.96± 0.06bM31-004337.16 in filter V on MJD  58420.010
17.86± 0.08bM31-004337.16 in filter B on MJD  58420.010
--------
58436.04 16.98± 0.04bM31-004337.16 in filter V on MJD  58436.040
17.95± 0.06bM31-004337.16 in filter B on MJD  58436.040
16.48± 0.04bM31-004337.16 in filter R on MJD  58436.040
----
58671.29 16.75± 0.07bM31-004337.16 in filter V on MJD  58671.290
17.60± 0.07bM31-004337.16 in filter B on MJD  58671.290
--------
58673.29 16.78± 0.07bM31-004337.16 in filter V on MJD  58673.290
---- 16.28± 0.07bM31-004337.16 in filter R on MJD  58673.290
15.87± 0.08bM31-004337.16 in filter I on MJD  58673.290
58696.30 16.86± 0.07bM31-004337.16 in filter V on MJD  58696.300
17.78± 0.07bM31-004337.16 in filter B on MJD  58696.300
16.36± 0.07bM31-004337.16 in filter R on MJD  58696.300
----
58779.05 17.04± 0.06bM31-004337.16 in filter V on MJD  58779.050
---- 16.50± 0.04bM31-004337.16 in filter R on MJD  58779.050
----
58812.07 16.87± 0.07bM31-004337.16 in filter V on MJD  58812.070
---- 16.41± 0.07bM31-004337.16 in filter R on MJD  58812.070
----
59000.38 17.06± 0.06AbM31-004337.16 in filter V on MJD  59000.380
M31-004337.16 in filter V on MJD  59000.380
---- 16.57± 0.08AbM31-004337.16 in filter R on MJD  59000.380
M31-004337.16 in filter R on MJD  59000.380
----
59055.31 16.85± 0.08bM31-004337.16 in filter V on MJD  59055.310
---- 16.39± 0.09bM31-004337.16 in filter R on MJD  59055.310
----
59077.20 16.87± 0.07bM31-004337.16 in filter V on MJD  59077.200
17.76± 0.07bM31-004337.16 in filter B on MJD  59077.200
16.41± 0.07bM31-004337.16 in filter R on MJD  59077.200
16.03± 0.10bM31-004337.16 in filter I on MJD  59077.200
59131.09 16.92± 0.07bM31-004337.16 in filter V on MJD  59131.090
---- 16.43± 0.07bM31-004337.16 in filter R on MJD  59131.090
----
59166.12 16.95± 0.07bM31-004337.16 in filter V on MJD  59166.120
-------- 16.09± 0.09bM31-004337.16 in filter I on MJD  59166.120
59194.11 17.05± 0.07bM31-004337.16 in filter V on MJD  59194.110
17.95± 0.07bM31-004337.16 in filter B on MJD  59194.110
--------
59376.35 16.89± 0.07bM31-004337.16 in filter V on MJD  59376.350
17.76± 0.07bM31-004337.16 in filter B on MJD  59376.350
--------
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 M31-004337.16Plot of color for M31-004337.16

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 [0.54 mag]B [0.40 mag]R [0.29 mag]
B [0.54 mag]0.82 (22)
R [0.29 mag]0.90 (19)0.71 (10)
I [0.32 mag]0.64 (15)0.55 (4)1.00 (3)

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 M31-004337.16

Plot to assess correlation between bands for M31-004337.16

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)
2.26 | 1.42
R
(I|R)
1.98 | 1.08-0.02 | 0.05
I
(I|R)
1.12 | 1.83--- | --- --- | ----

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