Color composite thumbnail image of UIT218UIT218 (J013350.92+303936.9)



Target Notes

Color composite thumbnail image of UIT218

Classification: HII

There is a high background around this target causing some concern even though it is >5 magnitudes brighter than anything else around it.

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 M33 Variability Hartman et al. Survey (2006) at VizieR


Photometry Table

Download table (txt) Key to Flags in Table Key For Images Plot/Graph Variability
MJDV*ImageB*ImageR*ImagesI*Images
56140.38 13.88± 0.05AbUIT218 in filter V on MJD  56140.380
UIT218 in filter V on MJD  56140.380
---- 13.41± 0.07AbUIT218 in filter R on MJD  56140.380
UIT218 in filter R on MJD  56140.380
----
56593.16 13.85± 0.03bUIT218 in filter V on MJD  56593.160
14.45± 0.02bUIT218 in filter B on MJD  56593.160
--------
56599.18 13.85± 0.04AbUIT218 in filter V on MJD  56599.180
UIT218 in filter V on MJD  56599.180
14.48± 0.05AbUIT218 in filter B on MJD  56599.180
UIT218 in filter B on MJD  56599.180
13.36± 0.06AbUIT218 in filter R on MJD  56599.180
UIT218 in filter R on MJD  56599.180
----
56976.19 13.85± 0.04bUIT218 in filter V on MJD  56976.190
14.48± 0.04bUIT218 in filter B on MJD  56976.190
13.34± 0.06bUIT218 in filter R on MJD  56976.190
----
57310.13 13.79± 0.05bUIT218 in filter V on MJD  57310.130
14.44± 0.07bUIT218 in filter B on MJD  57310.130
13.31± 0.05bUIT218 in filter R on MJD  57310.130
----
57328.16 13.87± 0.03bUIT218 in filter V on MJD  57328.160
14.50± 0.04bUIT218 in filter B on MJD  57328.160
13.37± 0.04bUIT218 in filter R on MJD  57328.160
----
57401.10 13.88± 0.04bUIT218 in filter V on MJD  57401.100
14.45± 0.05bUIT218 in filter B on MJD  57401.100
--------
57406.10 13.85± 0.04bUIT218 in filter V on MJD  57406.100
14.47± 0.03bUIT218 in filter B on MJD  57406.100
13.36± 0.04bUIT218 in filter R on MJD  57406.100
12.82± 0.07bUIT218 in filter I on MJD  57406.100
57634.36 13.86± 0.04AbUIT218 in filter V on MJD  57634.360
UIT218 in filter V on MJD  57634.360
14.45± 0.06AbUIT218 in filter B on MJD  57634.360
UIT218 in filter B on MJD  57634.360
13.39± 0.06AbUIT218 in filter R on MJD  57634.360
UIT218 in filter R on MJD  57634.360
12.84± 0.07AbUIT218 in filter I on MJD  57634.360
UIT218 in filter I on MJD  57634.360
57687.13 13.87± 0.05bUIT218 in filter V on MJD  57687.130
14.44± 0.06bUIT218 in filter B on MJD  57687.130
13.39± 0.05bUIT218 in filter R on MJD  57687.130
12.83± 0.06bUIT218 in filter I on MJD  57687.130
57964.35 13.85± 0.04AbUIT218 in filter V on MJD  57964.350
UIT218 in filter V on MJD  57964.350
14.42± 0.06AbUIT218 in filter B on MJD  57964.350
UIT218 in filter B on MJD  57964.350
13.36± 0.05AbUIT218 in filter R on MJD  57964.350
UIT218 in filter R on MJD  57964.350
12.85± 0.06AbUIT218 in filter I on MJD  57964.350
UIT218 in filter I on MJD  57964.350
57988.41 13.89± 0.05bUIT218 in filter V on MJD  57988.410
14.52± 0.04bUIT218 in filter B on MJD  57988.410
--------
58043.10 13.87± 0.04bUIT218 in filter V on MJD  58043.100
---- 13.36± 0.04bUIT218 in filter R on MJD  58043.100
12.81± 0.06bUIT218 in filter I on MJD  58043.100
58045.16 13.82± 0.05AbUIT218 in filter V on MJD  58045.160
UIT218 in filter V on MJD  58045.160
14.39± 0.07AbUIT218 in filter B on MJD  58045.160
UIT218 in filter B on MJD  58045.160
13.31± 0.05AbUIT218 in filter R on MJD  58045.160
UIT218 in filter R on MJD  58045.160
----
58073.19 13.85± 0.04AbUIT218 in filter V on MJD  58073.190
UIT218 in filter V on MJD  58073.190
14.41± 0.06AbUIT218 in filter B on MJD  58073.190
UIT218 in filter B on MJD  58073.190
--------
58103.16 13.86± 0.04AbUIT218 in filter V on MJD  58103.160
UIT218 in filter V on MJD  58103.160
UIT218 in filter V on MJD  58103.160
14.48± 0.04bUIT218 in filter B on MJD  58103.160
---- 12.86± 0.06bUIT218 in filter I on MJD  58103.160
58108.13 13.87± 0.05AbUIT218 in filter V on MJD  58108.130
UIT218 in filter V on MJD  58108.130
14.45± 0.07AbUIT218 in filter B on MJD  58108.130
UIT218 in filter B on MJD  58108.130
---- 12.85± 0.07AbUIT218 in filter I on MJD  58108.130
UIT218 in filter I on MJD  58108.130
58312.39 13.87± 0.05bUIT218 in filter V on MJD  58312.390
14.44± 0.07bUIT218 in filter B on MJD  58312.390
--------
58317.37 13.87± 0.04bUIT218 in filter V on MJD  58317.370
14.43± 0.06bUIT218 in filter B on MJD  58317.370
13.36± 0.04bUIT218 in filter R on MJD  58317.370
----
58341.34 13.86± 0.07bUIT218 in filter V on MJD  58341.340
-------- 12.86± 0.07bUIT218 in filter I on MJD  58341.340
58342.40 13.84± 0.04bUIT218 in filter V on MJD  58342.400
14.40± 0.06bUIT218 in filter B on MJD  58342.400
13.35± 0.05bUIT218 in filter R on MJD  58342.400
----
58375.14 13.86± 0.04bUIT218 in filter V on MJD  58375.140
---- 13.38± 0.05bUIT218 in filter R on MJD  58375.140
----
58420.10 13.83± 0.04bUIT218 in filter V on MJD  58420.100
14.36± 0.06bUIT218 in filter B on MJD  58420.100
---- 12.81± 0.07bUIT218 in filter I on MJD  58420.100
58433.00 13.88± 0.04bUIT218 in filter V on MJD  58433.000
---- 13.38± 0.05bUIT218 in filter R on MJD  58433.000
12.84± 0.06bUIT218 in filter I on MJD  58433.000
58673.38 13.92± 0.03bUIT218 in filter V on MJD  58673.380
14.56± 0.03bUIT218 in filter B on MJD  58673.380
--------
58695.36 13.86± 0.05bUIT218 in filter V on MJD  58695.360
14.43± 0.05bUIT218 in filter B on MJD  58695.360
13.37± 0.04bUIT218 in filter R on MJD  58695.360
----
58750.19 13.86± 0.03bUIT218 in filter V on MJD  58750.190
---- 13.31± 0.05bUIT218 in filter R on MJD  58750.190
----
58779.18 13.79± 0.03bUIT218 in filter V on MJD  58779.180
14.41± 0.03bUIT218 in filter B on MJD  58779.180
--------
58812.22 13.76± 0.05bUIT218 in filter V on MJD  58812.220
-------- 12.85± 0.05bUIT218 in filter I on MJD  58812.220
58902.06 13.82± 0.04AbUIT218 in filter V on MJD  58902.060
UIT218 in filter V on MJD  58902.060
---- 13.29± 0.04bUIT218 in filter R on MJD  58902.060
12.76± 0.07bUIT218 in filter I on MJD  58902.060
59056.38 13.74± 0.05bUIT218 in filter V on MJD  59056.380
14.44± 0.06bUIT218 in filter B on MJD  59056.380
13.29± 0.05bUIT218 in filter R on MJD  59056.380
12.81± 0.08bUIT218 in filter I on MJD  59056.380
59081.33 13.81± 0.03bUIT218 in filter V on MJD  59081.330
14.39± 0.06bUIT218 in filter B on MJD  59081.330
13.31± 0.03bUIT218 in filter R on MJD  59081.330
----
59082.32 13.83± 0.03bUIT218 in filter V on MJD  59082.320
14.46± 0.03bUIT218 in filter B on MJD  59082.320
UIT218 in filter B on MJD  59082.320
13.33± 0.04bUIT218 in filter R on MJD  59082.320
UIT218 in filter R on MJD  59082.320
----
59084.29-------- 13.27± 0.06TbUIT218 in filter R on MJD  59084.290
----
59161.09 13.78± 0.04AbUIT218 in filter V on MJD  59161.090
UIT218 in filter V on MJD  59161.090
14.43± 0.05AbUIT218 in filter B on MJD  59161.090
UIT218 in filter B on MJD  59161.090
13.22± 0.05AbUIT218 in filter R on MJD  59161.090
UIT218 in filter R on MJD  59161.090
----
59171.11 13.77± 0.04AbUIT218 in filter V on MJD  59171.110
UIT218 in filter V on MJD  59171.110
14.46± 0.03bUIT218 in filter B on MJD  59171.110
---- 12.79± 0.07AbUIT218 in filter I on MJD  59171.110
UIT218 in filter I on MJD  59171.110
59227.09 13.77± 0.04AbUIT218 in filter V on MJD  59227.090
UIT218 in filter V on MJD  59227.090
14.35± 0.04AbUIT218 in filter B on MJD  59227.090
UIT218 in filter B on MJD  59227.090
13.35± 0.05bUIT218 in filter R on MJD  59227.090
----
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 UIT218Plot of color for UIT218

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 [0.17 mag]R [0.20 mag]
B [0.22 mag]0.30 (28)
R [0.20 mag]0.54 (23)0.05 (17)
I [0.11 mag]0.18 (14)0.03 (9)0.61 (8)

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 UIT218

Plot to assess correlation between bands for UIT218

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)
0.75 | 0.94
R
(I|R)
0.54 | 1.063.50 | 0.03
I
(I|R)
0.17 | 2.380.04 | 1.560.24 | 1.95

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