Open a color composite thumbnail image of M31-004021.21M31-004021.21 (J004021.21+403117.1)


Target Notes

Open a color composite thumbnail image of M31-004021.21

Classification: -

No blend concerns

Find In Simbad Query LGGS Massey (2016) at VizieR Query CAT WISE (Eisenhardt et al., 2020) at VizieR Query Gaia DR3 (2022) 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
56599.13 16.67± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 56599.130
 16.92± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 56599.130
 16.48± 0.04-Open a thumnail image of M31-004021.21 in filter R on MJD 56599.130
----
56604.11 16.68± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 56604.110
 16.98± 0.03-Open a thumnail image of M31-004021.21 in filter B on MJD 56604.110
 16.46± 0.05-Open a thumnail image of M31-004021.21 in filter R on MJD 56604.110
----
56930.16 16.67± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 56930.160
 16.98± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 56930.160
 16.46± 0.04-Open a thumnail image of M31-004021.21 in filter R on MJD 56930.160
----
56951.10 16.69± 0.04-Open a thumbnail image of M31-004021.21 in filter V on MJD 56951.100
 17.00± 0.03-Open a thumnail image of M31-004021.21 in filter B on MJD 56951.100
 16.49± 0.05-Open a thumnail image of M31-004021.21 in filter R on MJD 56951.100
----
57307.14 16.66± 0.04AOpen a thumbnail image of M31-004021.21 in filter V on MJD 57307.140
Open a thumbnail image of M31-004021.21 in filter V on MJD 57307.140
 16.96± 0.03AOpen a thumnail image of M31-004021.21 in filter B on MJD 57307.140
Open a thumnail image of M31-004021.21 in filter B on MJD 57307.140
 16.47± 0.04AOpen a thumnail image of M31-004021.21 in filter R on MJD 57307.140
Open a thumnail image of M31-004021.21 in filter R on MJD 57307.140
----
57340.22 16.63± 0.06-Open a thumbnail image of M31-004021.21 in filter V on MJD 57340.220
-------- 16.21± 0.08-Open a thumnail image of M31-004021.21 in filter I on MJD 57340.220
57634.30---- 16.96± 0.04TOpen a thumnail image of M31-004021.21 in filter B on MJD 57634.300
 16.46± 0.06TOpen a thumnail image of M31-004021.21 in filter R on MJD 57634.300
----
57638.23 16.66± 0.05-Open a thumbnail image of M31-004021.21 in filter V on MJD 57638.230
 16.96± 0.05-Open a thumnail image of M31-004021.21 in filter B on MJD 57638.230
 16.49± 0.07-Open a thumnail image of M31-004021.21 in filter R on MJD 57638.230
 16.28± 0.07-Open a thumnail image of M31-004021.21 in filter I on MJD 57638.230
57743.02 16.79± 0.04-Open a thumbnail image of M31-004021.21 in filter V on MJD 57743.020
 17.06± 0.03-Open a thumnail image of M31-004021.21 in filter B on MJD 57743.020
 16.57± 0.02-Open a thumnail image of M31-004021.21 in filter R on MJD 57743.020
 16.36± 0.04-Open a thumnail image of M31-004021.21 in filter I on MJD 57743.020
57958.38 16.72± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 57958.380
---- 16.52± 0.04-Open a thumnail image of M31-004021.21 in filter R on MJD 57958.380
 16.30± 0.04-Open a thumnail image of M31-004021.21 in filter I on MJD 57958.380
57963.33 16.67± 0.04AOpen a thumbnail image of M31-004021.21 in filter V on MJD 57963.330
Open a thumbnail image of M31-004021.21 in filter V on MJD 57963.330
 16.96± 0.03AOpen a thumnail image of M31-004021.21 in filter B on MJD 57963.330
Open a thumnail image of M31-004021.21 in filter B on MJD 57963.330
---- 16.28± 0.07-Open a thumnail image of M31-004021.21 in filter I on MJD 57963.330
57964.26 16.71± 0.04-Open a thumbnail image of M31-004021.21 in filter V on MJD 57964.260
---- 16.53± 0.04-Open a thumnail image of M31-004021.21 in filter R on MJD 57964.260
----
57988.31 16.76± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 57988.310
 17.03± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 57988.310
---- 16.34± 0.04-Open a thumnail image of M31-004021.21 in filter I on MJD 57988.310
58035.07 16.58± 0.06-Open a thumbnail image of M31-004021.21 in filter V on MJD 58035.070
---- 16.36± 0.07-Open a thumnail image of M31-004021.21 in filter R on MJD 58035.070
----
58045.10 16.73± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 58045.100
 17.02± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 58045.100
 16.53± 0.04-Open a thumnail image of M31-004021.21 in filter R on MJD 58045.100
----
58067.14 16.72± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 58067.140
-------- 16.30± 0.04-Open a thumnail image of M31-004021.21 in filter I on MJD 58067.140
58073.12 16.75± 0.04-Open a thumbnail image of M31-004021.21 in filter V on MJD 58073.120
 16.98± 0.05-Open a thumnail image of M31-004021.21 in filter B on MJD 58073.120
--------
58077.14 16.76± 0.04-Open a thumbnail image of M31-004021.21 in filter V on MJD 58077.140
 17.01± 0.03-Open a thumnail image of M31-004021.21 in filter B on MJD 58077.140
---- 16.37± 0.07-Open a thumnail image of M31-004021.21 in filter I on MJD 58077.140
58098.18 16.71± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 58098.180
-------- 16.33± 0.04-Open a thumnail image of M31-004021.21 in filter I on MJD 58098.180
58103.11 16.75± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 58103.110
 17.02± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 58103.110
---- 16.27± 0.05-Open a thumnail image of M31-004021.21 in filter I on MJD 58103.110
58316.31 16.71± 0.04AOpen a thumbnail image of M31-004021.21 in filter V on MJD 58316.310
Open a thumbnail image of M31-004021.21 in filter V on MJD 58316.310
 16.97± 0.04AOpen a thumnail image of M31-004021.21 in filter B on MJD 58316.310
Open a thumnail image of M31-004021.21 in filter B on MJD 58316.310
 16.50± 0.04AOpen a thumnail image of M31-004021.21 in filter R on MJD 58316.310
Open a thumnail image of M31-004021.21 in filter R on MJD 58316.310
----
58317.29 16.68± 0.04AOpen a thumbnail image of M31-004021.21 in filter V on MJD 58317.290
Open a thumbnail image of M31-004021.21 in filter V on MJD 58317.290
-------- 16.27± 0.06AOpen a thumnail image of M31-004021.21 in filter I on MJD 58317.290
Open a thumnail image of M31-004021.21 in filter I on MJD 58317.290
58339.32 16.68± 0.04-Open a thumbnail image of M31-004021.21 in filter V on MJD 58339.320
 16.97± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 58339.320
 16.48± 0.05-Open a thumnail image of M31-004021.21 in filter R on MJD 58339.320
----
58341.30 16.80± 0.08-Open a thumbnail image of M31-004021.21 in filter V on MJD 58341.300
-------- 16.39± 0.08-Open a thumnail image of M31-004021.21 in filter I on MJD 58341.300
58342.23 16.68± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 58342.230
 17.02± 0.03-Open a thumnail image of M31-004021.21 in filter B on MJD 58342.230
---- 16.29± 0.04-Open a thumnail image of M31-004021.21 in filter I on MJD 58342.230
Open a thumnail image of M31-004021.21 in filter I on MJD 58342.230
58372.15 16.70± 0.03AOpen a thumbnail image of M31-004021.21 in filter V on MJD 58372.150
Open a thumbnail image of M31-004021.21 in filter V on MJD 58372.150
-------- 16.24± 0.05AOpen a thumnail image of M31-004021.21 in filter I on MJD 58372.150
Open a thumnail image of M31-004021.21 in filter I on MJD 58372.150
58373.13 16.63± 0.04-Open a thumbnail image of M31-004021.21 in filter V on MJD 58373.130
 16.95± 0.05-Open a thumnail image of M31-004021.21 in filter B on MJD 58373.130
--------
58403.12 16.68± 0.03AOpen a thumbnail image of M31-004021.21 in filter V on MJD 58403.120
Open a thumbnail image of M31-004021.21 in filter V on MJD 58403.120
 16.96± 0.03AOpen a thumnail image of M31-004021.21 in filter B on MJD 58403.120
Open a thumnail image of M31-004021.21 in filter B on MJD 58403.120
--------
58433.06 16.67± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 58433.060
 16.98± 0.03-Open a thumnail image of M31-004021.21 in filter B on MJD 58433.060
 16.49± 0.03-Open a thumnail image of M31-004021.21 in filter R on MJD 58433.060
----
58672.33 16.70± 0.03AOpen a thumbnail image of M31-004021.21 in filter V on MJD 58672.330
Open a thumbnail image of M31-004021.21 in filter V on MJD 58672.330
 17.01± 0.03-Open a thumnail image of M31-004021.21 in filter B on MJD 58672.330
 16.45± 0.04-Open a thumnail image of M31-004021.21 in filter R on MJD 58672.330
 16.26± 0.05-Open a thumnail image of M31-004021.21 in filter I on MJD 58672.330
58695.25 16.68± 0.03AOpen a thumbnail image of M31-004021.21 in filter V on MJD 58695.250
Open a thumbnail image of M31-004021.21 in filter V on MJD 58695.250
 16.99± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 58695.250
 16.51± 0.03-Open a thumnail image of M31-004021.21 in filter R on MJD 58695.250
 16.30± 0.04-Open a thumnail image of M31-004021.21 in filter I on MJD 58695.250
58757.06 16.71± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 58757.060
---- 16.50± 0.03-Open a thumnail image of M31-004021.21 in filter R on MJD 58757.060
----
58779.11 16.66± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 58779.110
---- 16.47± 0.03-Open a thumnail image of M31-004021.21 in filter R on MJD 58779.110
----
58784.02 16.64± 0.04-Open a thumbnail image of M31-004021.21 in filter V on MJD 58784.020
 16.93± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 58784.020
--------
58836.09 16.71± 0.02AOpen a thumbnail image of M31-004021.21 in filter V on MJD 58836.090
Open a thumbnail image of M31-004021.21 in filter V on MJD 58836.090
---- 16.50± 0.03-Open a thumnail image of M31-004021.21 in filter R on MJD 58836.090
 16.25± 0.04-Open a thumnail image of M31-004021.21 in filter I on MJD 58836.090
59001.40 16.78± 0.05TOpen a thumbnail image of M31-004021.21 in filter V on MJD 59001.400
------------
59019.39 16.80± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 59019.390
 17.19± 0.06-Open a thumnail image of M31-004021.21 in filter B on MJD 59019.390
--------
59026.34 16.72± 0.04AOpen a thumbnail image of M31-004021.21 in filter V on MJD 59026.340
Open a thumbnail image of M31-004021.21 in filter V on MJD 59026.340
---- 16.50± 0.05-Open a thumnail image of M31-004021.21 in filter R on MJD 59026.340
----
59059.28 16.73± 0.03AOpen a thumbnail image of M31-004021.21 in filter V on MJD 59059.280
Open a thumbnail image of M31-004021.21 in filter V on MJD 59059.280
 17.02± 0.03AOpen a thumnail image of M31-004021.21 in filter B on MJD 59059.280
Open a thumnail image of M31-004021.21 in filter B on MJD 59059.280
 16.55± 0.04-Open a thumnail image of M31-004021.21 in filter R on MJD 59059.280
 16.30± 0.06-Open a thumnail image of M31-004021.21 in filter I on MJD 59059.280
59081.20 16.75± 0.04-Open a thumbnail image of M31-004021.21 in filter V on MJD 59081.200
-------- 16.32± 0.07-Open a thumnail image of M31-004021.21 in filter I on MJD 59081.200
59082.29 16.70± 0.04-Open a thumbnail image of M31-004021.21 in filter V on MJD 59082.290
 17.00± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 59082.290
 16.52± 0.05-Open a thumnail image of M31-004021.21 in filter R on MJD 59082.290
----
59131.15 16.73± 0.04AOpen a thumbnail image of M31-004021.21 in filter V on MJD 59131.150
Open a thumbnail image of M31-004021.21 in filter V on MJD 59131.150
 17.06± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 59131.150
 16.53± 0.04-Open a thumnail image of M31-004021.21 in filter R on MJD 59131.150
----
59166.22 16.76± 0.03AOpen a thumbnail image of M31-004021.21 in filter V on MJD 59166.220
Open a thumbnail image of M31-004021.21 in filter V on MJD 59166.220
-------- 16.36± 0.07AOpen a thumnail image of M31-004021.21 in filter I on MJD 59166.220
Open a thumnail image of M31-004021.21 in filter I on MJD 59166.220
59194.17 16.74± 0.04AOpen a thumbnail image of M31-004021.21 in filter V on MJD 59194.170
Open a thumbnail image of M31-004021.21 in filter V on MJD 59194.170
 17.02± 0.03-Open a thumnail image of M31-004021.21 in filter B on MJD 59194.170
 16.54± 0.04-Open a thumnail image of M31-004021.21 in filter R on MJD 59194.170
----
59380.36 16.76± 0.05AOpen a thumbnail image of M31-004021.21 in filter V on MJD 59380.360
Open a thumbnail image of M31-004021.21 in filter V on MJD 59380.360
 17.01± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 59380.360
 16.61± 0.06-Open a thumnail image of M31-004021.21 in filter R on MJD 59380.360
----
59415.32 16.74± 0.04-Open a thumbnail image of M31-004021.21 in filter V on MJD 59415.320
---- 16.55± 0.06-Open a thumnail image of M31-004021.21 in filter R on MJD 59415.320
----
59441.34 16.78± 0.03AOpen a thumbnail image of M31-004021.21 in filter V on MJD 59441.340
Open a thumbnail image of M31-004021.21 in filter V on MJD 59441.340
 17.09± 0.03-Open a thumnail image of M31-004021.21 in filter B on MJD 59441.340
---- 16.33± 0.06AOpen a thumnail image of M31-004021.21 in filter I on MJD 59441.340
Open a thumnail image of M31-004021.21 in filter I on MJD 59441.340
59463.12 16.78± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 59463.120
-------- 16.36± 0.06-Open a thumnail image of M31-004021.21 in filter I on MJD 59463.120
59483.12 16.77± 0.03AOpen a thumbnail image of M31-004021.21 in filter V on MJD 59483.120
Open a thumbnail image of M31-004021.21 in filter V on MJD 59483.120
 17.05± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 59483.120
 16.54± 0.04-Open a thumnail image of M31-004021.21 in filter R on MJD 59483.120
----
59523.05 16.73± 0.04AOpen a thumbnail image of M31-004021.21 in filter V on MJD 59523.050
Open a thumbnail image of M31-004021.21 in filter V on MJD 59523.050
 17.04± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 59523.050
 16.51± 0.05-Open a thumnail image of M31-004021.21 in filter R on MJD 59523.050
 16.28± 0.06-Open a thumnail image of M31-004021.21 in filter I on MJD 59523.050
59548.10 16.76± 0.04AOpen a thumbnail image of M31-004021.21 in filter V on MJD 59548.100
Open a thumbnail image of M31-004021.21 in filter V on MJD 59548.100
 17.04± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 59548.100
 16.56± 0.04-Open a thumnail image of M31-004021.21 in filter R on MJD 59548.100
 16.35± 0.06-Open a thumnail image of M31-004021.21 in filter I on MJD 59548.100
59759.37 16.80± 0.05-Open a thumbnail image of M31-004021.21 in filter V on MJD 59759.370
 17.08± 0.05-Open a thumnail image of M31-004021.21 in filter B on MJD 59759.370
 16.59± 0.05-Open a thumnail image of M31-004021.21 in filter R on MJD 59759.370
----
59794.28 16.77± 0.03AOpen a thumbnail image of M31-004021.21 in filter V on MJD 59794.280
Open a thumbnail image of M31-004021.21 in filter V on MJD 59794.280
 17.02± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 59794.280
---- 16.41± 0.06-Open a thumnail image of M31-004021.21 in filter I on MJD 59794.280
59823.20 16.71± 0.04-Open a thumbnail image of M31-004021.21 in filter V on MJD 59823.200
---- 16.50± 0.05-Open a thumnail image of M31-004021.21 in filter R on MJD 59823.200
----
59849.13 16.74± 0.03AOpen a thumbnail image of M31-004021.21 in filter V on MJD 59849.130
Open a thumbnail image of M31-004021.21 in filter V on MJD 59849.130
-------- 16.38± 0.06AOpen a thumnail image of M31-004021.21 in filter I on MJD 59849.130
Open a thumnail image of M31-004021.21 in filter I on MJD 59849.130
59903.06 16.80± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 59903.060
 17.07± 0.03-Open a thumnail image of M31-004021.21 in filter B on MJD 59903.060
 16.59± 0.04-Open a thumnail image of M31-004021.21 in filter R on MJD 59903.060
----
59904.08 16.72± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 59904.080
---- 16.54± 0.04-Open a thumnail image of M31-004021.21 in filter R on MJD 59904.080
Open a thumnail image of M31-004021.21 in filter R on MJD 59904.080
 16.36± 0.06-Open a thumnail image of M31-004021.21 in filter I on MJD 59904.080
59932.06 16.74± 0.03AOpen a thumbnail image of M31-004021.21 in filter V on MJD 59932.060
Open a thumbnail image of M31-004021.21 in filter V on MJD 59932.060
 17.00± 0.03-Open a thumnail image of M31-004021.21 in filter B on MJD 59932.060
---- 16.40± 0.06-Open a thumnail image of M31-004021.21 in filter I on MJD 59932.060
60152.33 16.75± 0.05AOpen a thumbnail image of M31-004021.21 in filter V on MJD 60152.330
Open a thumbnail image of M31-004021.21 in filter V on MJD 60152.330
Open a thumbnail image of M31-004021.21 in filter V on MJD 60152.330
 17.03± 0.06AOpen a thumnail image of M31-004021.21 in filter B on MJD 60152.330
Open a thumnail image of M31-004021.21 in filter B on MJD 60152.330
 16.53± 0.06-Open a thumnail image of M31-004021.21 in filter R on MJD 60152.330
----
60175.23 16.72± 0.04AOpen a thumbnail image of M31-004021.21 in filter V on MJD 60175.230
Open a thumbnail image of M31-004021.21 in filter V on MJD 60175.230
Open a thumbnail image of M31-004021.21 in filter V on MJD 60175.230
 17.00± 0.05-Open a thumnail image of M31-004021.21 in filter B on MJD 60175.230
 16.49± 0.04AOpen a thumnail image of M31-004021.21 in filter R on MJD 60175.230
Open a thumnail image of M31-004021.21 in filter R on MJD 60175.230
 16.33± 0.06AOpen a thumnail image of M31-004021.21 in filter I on MJD 60175.230
Open a thumnail image of M31-004021.21 in filter I on MJD 60175.230
Open a thumnail image of M31-004021.21 in filter I on MJD 60175.230
60201.15 16.68± 0.04AOpen a thumbnail image of M31-004021.21 in filter V on MJD 60201.150
Open a thumbnail image of M31-004021.21 in filter V on MJD 60201.150
Open a thumbnail image of M31-004021.21 in filter V on MJD 60201.150
 16.98± 0.04AOpen a thumnail image of M31-004021.21 in filter B on MJD 60201.150
Open a thumnail image of M31-004021.21 in filter B on MJD 60201.150
 16.51± 0.05-Open a thumnail image of M31-004021.21 in filter R on MJD 60201.150
----
60251.10 16.70± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 60251.100
-------- 16.32± 0.04-Open a thumnail image of M31-004021.21 in filter I on MJD 60251.100
60262.07 16.77± 0.04AOpen a thumbnail image of M31-004021.21 in filter V on MJD 60262.070
Open a thumbnail image of M31-004021.21 in filter V on MJD 60262.070
 16.99± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 60262.070
---- 16.41± 0.06-Open a thumnail image of M31-004021.21 in filter I on MJD 60262.070
60292.11 16.68± 0.04TOpen a thumbnail image of M31-004021.21 in filter V on MJD 60292.110
------------
60498.34 16.72± 0.04AOpen a thumbnail image of M31-004021.21 in filter V on MJD 60498.340
Open a thumbnail image of M31-004021.21 in filter V on MJD 60498.340
Open a thumbnail image of M31-004021.21 in filter V on MJD 60498.340
 16.98± 0.05-Open a thumnail image of M31-004021.21 in filter B on MJD 60498.340
 16.53± 0.06-Open a thumnail image of M31-004021.21 in filter R on MJD 60498.340
 16.43± 0.07-Open a thumnail image of M31-004021.21 in filter I on MJD 60498.340
60506.28 16.72± 0.04AOpen a thumbnail image of M31-004021.21 in filter V on MJD 60506.280
Open a thumbnail image of M31-004021.21 in filter V on MJD 60506.280
Open a thumbnail image of M31-004021.21 in filter V on MJD 60506.280
 17.00± 0.05-Open a thumnail image of M31-004021.21 in filter B on MJD 60506.280
 16.52± 0.04AOpen a thumnail image of M31-004021.21 in filter R on MJD 60506.280
Open a thumnail image of M31-004021.21 in filter R on MJD 60506.280
----
60529.32 16.72± 0.04AOpen a thumbnail image of M31-004021.21 in filter V on MJD 60529.320
Open a thumbnail image of M31-004021.21 in filter V on MJD 60529.320
Open a thumbnail image of M31-004021.21 in filter V on MJD 60529.320
 17.07± 0.03-Open a thumnail image of M31-004021.21 in filter B on MJD 60529.320
---- 16.25± 0.06AOpen a thumnail image of M31-004021.21 in filter I on MJD 60529.320
Open a thumnail image of M31-004021.21 in filter I on MJD 60529.320
60556.20 16.77± 0.04AOpen a thumbnail image of M31-004021.21 in filter V on MJD 60556.200
Open a thumbnail image of M31-004021.21 in filter V on MJD 60556.200
 16.97± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 60556.200
 16.57± 0.04AOpen a thumnail image of M31-004021.21 in filter R on MJD 60556.200
Open a thumnail image of M31-004021.21 in filter R on MJD 60556.200
 16.46± 0.07-Open a thumnail image of M31-004021.21 in filter I on MJD 60556.200
60562.15 16.73± 0.05-Open a thumbnail image of M31-004021.21 in filter V on MJD 60562.150
 17.02± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 60562.150
---- 16.27± 0.07-Open a thumnail image of M31-004021.21 in filter I on MJD 60562.150
60564.18 16.74± 0.05-Open a thumbnail image of M31-004021.21 in filter V on MJD 60564.180
---- 16.55± 0.05-Open a thumnail image of M31-004021.21 in filter R on MJD 60564.180
----
60588.07 16.66± 0.04-Open a thumbnail image of M31-004021.21 in filter V on MJD 60588.070
---- 16.49± 0.04-Open a thumnail image of M31-004021.21 in filter R on MJD 60588.070
 16.32± 0.07-Open a thumnail image of M31-004021.21 in filter I on MJD 60588.070
60592.06 16.74± 0.03-Open a thumbnail image of M31-004021.21 in filter V on MJD 60592.060
 17.00± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 60592.060
 16.53± 0.04-Open a thumnail image of M31-004021.21 in filter R on MJD 60592.060
----
60595.08 16.73± 0.04-Open a thumbnail image of M31-004021.21 in filter V on MJD 60595.080
 17.00± 0.05-Open a thumnail image of M31-004021.21 in filter B on MJD 60595.080
 16.59± 0.05-Open a thumnail image of M31-004021.21 in filter R on MJD 60595.080
 16.36± 0.09-Open a thumnail image of M31-004021.21 in filter I on MJD 60595.080
60649.11 16.72± 0.04AOpen a thumbnail image of M31-004021.21 in filter V on MJD 60649.110
Open a thumbnail image of M31-004021.21 in filter V on MJD 60649.110
 16.96± 0.04-Open a thumnail image of M31-004021.21 in filter B on MJD 60649.110
---- 16.27± 0.07-Open a thumnail image of M31-004021.21 in filter I on MJD 60649.110
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

Open a plot of photometry for M31-004021.21Open a plot of color for M31-004021.21

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 [0.22 mag]B [0.27 mag]R [0.25 mag]
B [0.27 mag]0.53 (48)
R [0.25 mag]0.79 (43)0.39 (32)
I [0.25 mag]0.42 (38)0.04 (23)0.42 (15)

Magnitude-Magnitude Plots

The plots below are provided to check the values in the table above and also to show any non-linear correlations

Opens a plot to assess correlation between bands for M31-004021.21

Opens a plot to assess correlation between bands for M31-004021.21

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)		1.08 | 0.85
R
(I|R)		0.93 | 1.120.24 | 0.07
I
(I|R)		0.63 | 1.09-0.14 | 0.820.70 | 1.03

Back to catalog index

By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory

Generated on 2026-01-19 14:34:50 UT-5