Color composite thumbnail image of AF AndAF And (J004333.09+411210.4)



Target Notes

Color composite thumbnail image of AF_And

Classification: LBV

Four stars >5 magnitudes fainter within 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 17.40± 0.06TbAF_And in filter V on MJD  56142.330
AF_And in filter V on MJD  56142.330
------------
56267.15-------- 17.00± 0.05TbAF_And in filter R on MJD  56267.150
AF_And in filter R on MJD  56267.150
----
56490.38 16.95± 0.04TbAF_And in filter V on MJD  56490.380
------------
56536.26 16.93± 0.05bAF_And in filter V on MJD  56536.260
---- 16.70± 0.06bAF_And in filter R on MJD  56536.260
----
56537.18 17.02± 0.04AbAF_And in filter V on MJD  56537.180
AF_And in filter V on MJD  56537.180
17.06± 0.05AbAF_And in filter B on MJD  56537.180
AF_And in filter B on MJD  56537.180
16.85± 0.03bAF_And in filter R on MJD  56537.180
AF_And in filter R on MJD  56537.180
----
56915.16 17.30± 0.04bAF_And in filter V on MJD  56915.160
17.34± 0.06bAF_And in filter B on MJD  56915.160
17.09± 0.05bAF_And in filter R on MJD  56915.160
----
57227.34 17.15± 0.04bAF_And in filter V on MJD  57227.340
17.19± 0.05bAF_And in filter B on MJD  57227.340
16.91± 0.04bAF_And in filter R on MJD  57227.340
----
57310.10 17.00± 0.03bAF_And in filter V on MJD  57310.100
-------- 16.78± 0.07bAF_And in filter I on MJD  57310.100
57633.35 16.71± 0.05AbAF_And in filter V on MJD  57633.350
AF_And in filter V on MJD  57633.350
16.82± 0.06AbAF_And in filter B on MJD  57633.350
AF_And in filter B on MJD  57633.350
16.42± 0.04AbAF_And in filter R on MJD  57633.350
AF_And in filter R on MJD  57633.350
----
57635.35 16.72± 0.05bAF_And in filter V on MJD  57635.350
-------- 16.31± 0.06bAF_And in filter I on MJD  57635.350
57638.25 16.74± 0.04bAF_And in filter V on MJD  57638.250
-------- 16.32± 0.07bAF_And in filter I on MJD  57638.250
57888.07 16.14± 0.04bAF_And in filter V on MJD  57888.070
16.21± 0.09bAF_And in filter B on MJD  57888.070
15.74± 0.04bAF_And in filter R on MJD  57888.070
----
57928.32 16.18± 0.04bAF_And in filter V on MJD  57928.320
16.31± 0.06bAF_And in filter B on MJD  57928.320
15.86± 0.06bAF_And in filter R on MJD  57928.320
15.73± 0.08bAF_And in filter I on MJD  57928.320
57958.26 16.21± 0.06bAF_And in filter V on MJD  57958.260
16.34± 0.07bAF_And in filter B on MJD  57958.260
---- 15.76± 0.06bAF_And in filter I on MJD  57958.260
57963.26 16.22± 0.06bAF_And in filter V on MJD  57963.260
16.32± 0.07bAF_And in filter B on MJD  57963.260
--------
57988.22 16.22± 0.07bAF_And in filter V on MJD  57988.220
16.35± 0.07bAF_And in filter B on MJD  57988.220
---- 15.84± 0.06bAF_And in filter I on MJD  57988.220
58035.03 16.39± 0.04bAF_And in filter V on MJD  58035.030
---- 16.11± 0.04bAF_And in filter R on MJD  58035.030
----
58043.05 16.41± 0.04bAF_And in filter V on MJD  58043.050
16.53± 0.05bAF_And in filter B on MJD  58043.050
16.14± 0.04bAF_And in filter R on MJD  58043.050
----
58045.05 16.42± 0.04bAF_And in filter V on MJD  58045.050
-------- 15.91± 0.06bAF_And in filter I on MJD  58045.050
58067.10 16.35± 0.05bAF_And in filter V on MJD  58067.100
-------- 15.96± 0.06bAF_And in filter I on MJD  58067.100
58073.09 16.35± 0.06bAF_And in filter V on MJD  58073.090
16.46± 0.07bAF_And in filter B on MJD  58073.090
--------
58077.08 16.31± 0.07bAF_And in filter V on MJD  58077.080
-------- 15.92± 0.07bAF_And in filter I on MJD  58077.080
58098.07 16.36± 0.06bAF_And in filter V on MJD  58098.070
16.45± 0.07bAF_And in filter B on MJD  58098.070
--------
58103.08 16.30± 0.05bAF_And in filter V on MJD  58103.080
-------- 15.87± 0.07bAF_And in filter I on MJD  58103.080
58312.26 16.33± 0.06bAF_And in filter V on MJD  58312.260
16.48± 0.07bAF_And in filter B on MJD  58312.260
16.02± 0.06bAF_And in filter R on MJD  58312.260
----
58316.24 16.26± 0.06bAF_And in filter V on MJD  58316.240
-------- 15.82± 0.06bAF_And in filter I on MJD  58316.240
58339.26 16.23± 0.06bAF_And in filter V on MJD  58339.260
-------- 15.80± 0.07bAF_And in filter I on MJD  58339.260
58342.26 16.22± 0.04bAF_And in filter V on MJD  58342.260
16.34± 0.06bAF_And in filter B on MJD  58342.260
--------
58366.11 16.26± 0.04bAF_And in filter V on MJD  58366.110
16.39± 0.06bAF_And in filter B on MJD  58366.110
--------
58375.09 16.33± 0.04bAF_And in filter V on MJD  58375.090
---- 16.03± 0.04bAF_And in filter R on MJD  58375.090
----
58403.06 16.17± 0.03bAF_And in filter V on MJD  58403.060
-------- 15.68± 0.05bAF_And in filter I on MJD  58403.060
58420.01 16.01± 0.06bAF_And in filter V on MJD  58420.010
16.13± 0.08bAF_And in filter B on MJD  58420.010
--------
58436.04 15.92± 0.04bAF_And in filter V on MJD  58436.040
16.05± 0.06bAF_And in filter B on MJD  58436.040
15.68± 0.04bAF_And in filter R on MJD  58436.040
----
58671.35 15.96± 0.03AbAF_And in filter V on MJD  58671.350
AF_And in filter V on MJD  58671.350
16.13± 0.03bAF_And in filter B on MJD  58671.350
15.68± 0.04bAF_And in filter R on MJD  58671.350
----
58695.41 16.01± 0.03bAF_And in filter V on MJD  58695.410
---- 15.75± 0.04bAF_And in filter R on MJD  58695.410
----
58750.11 16.11± 0.03bAF_And in filter V on MJD  58750.110
-------- 15.69± 0.05bAF_And in filter I on MJD  58750.110
58779.03 16.23± 0.03bAF_And in filter V on MJD  58779.030
16.36± 0.03bAF_And in filter B on MJD  58779.030
--------
58812.16 16.32± 0.03bAF_And in filter V on MJD  58812.160
---- 16.06± 0.03bAF_And in filter R on MJD  58812.160
----
59000.37 16.64± 0.06bAF_And in filter V on MJD  59000.370
---- 16.32± 0.04bAF_And in filter R on MJD  59000.370
----
59055.29 16.79± 0.06bAF_And in filter V on MJD  59055.290
16.90± 0.07bAF_And in filter B on MJD  59055.290
--------
59077.25 16.67± 0.07bAF_And in filter V on MJD  59077.250
---- 16.32± 0.05bAF_And in filter R on MJD  59077.250
16.20± 0.06bAF_And in filter I on MJD  59077.250
59131.11 16.62± 0.04bAF_And in filter V on MJD  59131.110
16.73± 0.05bAF_And in filter B on MJD  59131.110
--------
59166.14 16.44± 0.05bAF_And in filter V on MJD  59166.140
-------- 15.98± 0.06bAF_And in filter I on MJD  59166.140
59194.12 16.32± 0.03bAF_And in filter V on MJD  59194.120
---- 15.99± 0.04bAF_And in filter R on MJD  59194.120
----
59376.38 15.97± 0.07bAF_And in filter V on MJD  59376.380
16.15± 0.05bAF_And in filter B on MJD  59376.380
--------
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 AF_AndPlot of color for AF_And

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 [1.30 mag]B [1.48 mag]R [1.42 mag]
B [1.30 mag]1.00 (22)
R [1.42 mag]0.99 (18)0.99 (10)
I [1.11 mag]0.97 (16)0.87 (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 AF_And

Plot to assess correlation between bands for AF_And

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)
64.77 | 0.71
R
(I|R)
113.28 | 1.00111.18 | 0.56
I
(I|R)
29.33 | 1.43--- | --- --- | ----

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