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XSC -- Virgo Galaxy Cluster:
Full Resolution, 3 deg2 Mosaic

In order to test the XSC completeness at fainter and more compact scales, we employ a full resolution mosaic of the "Heart of Virgo" (note M87 in lower left corner):

a. Results

The Virgo full resolution mosaic was split into 60 pieces, each 800X900 pixels (approximately 40 arcmin on a side). The 2MASS working database extended sources were marked with blue circles, and the XSC sources with green circles. The 2MASS Point Source Catalog (PSC) were marked with orange circles. Finally, sources found in the NED database were marked with magenta diamonds (presumably these are Virgo Cluster galaxies).

The sub-images were then visually inspected, concentrating on clearly delineated Virgo galaxies that are not in the XSC (i.e., source not circled in green). These sources (at least the ones with measured S/N > 7) represent incompleteness in the XSC. The following table presents the 10X6 grid of sub-images with additional "zoom" images of galaxies missing from the XSC. (things to note: "chaff" in proximity to large and bright galaxies is mostly eliminated from the XSC; artifacts from bright stars; airglow and background gradients; source confusion; faint or compact sources provide little if any information for this experiment)

- 1 2 3 4 5 6 7 8 9 10
1 panel panel
Galaxy #1 		panel panel
Galaxy #1 		panel
Galaxy #1
Galaxy #2 		panel
Galaxy #1 		panel panel panel
Galaxy #1 		panel
2 panel panel panel
Galaxy #1 		panel
Galaxy #1 		panel panel
Galaxy #1 		panel panel
Galaxy #1
Galaxy #2 		panel panel
3 panel
Galaxy #1 		panel panel
Galaxy #1 		panel
Galaxy #1
Galaxy #2_faint 		panel panel
Galaxy #1 		panel
Galaxy #1
Galaxy #2 		panel
Galaxy_VCC815
Galaxy #2 		panel
Galaxy #1
Galaxy #2 		panel
Galaxy #1
Galaxy #2/3
4 panel
Galaxy #1
Galaxy #2 		panel
Galaxy #1 		panel
Galaxy #1 		panel
Galaxy #1 		panel
Galaxy_IC3388
Galaxy #2 		panel
Galaxy #1
Galaxy #2
Galaxy #3 		panel
Galaxy #1 		panel
Galaxy #1 		panel
Galaxy #1 		panel
Galaxy #1
Galaxy #2
5 panel
Galaxy_VCC1389 		panel
Galaxy_UGC7652 		panel
Galaxy #1
Galaxy #2/3
Galaxy #4 		panel
Galaxy #1 		panel panel
Galaxy #1
Galaxy #2 		panel
Galaxy_VCC928 		panel panel panel
6 panel
Galaxy #1/2
Galaxy #3 		panel panel
Galaxy #1 		panel
Galaxy #1 		panel panel
Galaxy #1 		panel
Galaxy #1 		panel
Galaxy_VCC823
Galaxy #2 		panel panel
Galaxy #1
2MASS Extended Sources == blue circles;
2MASS XSC Sources == green circles;
2MASS PSC Sources == orange circles;
NED Objects == magenta circles

b. Missing Galaxies

IP JP x y ra dec radius ba pa ib mag dmag gif image
2 1 1532.0 4876.0 187.64738 13.62123 7.0 1.000 0.0 j 15.606 0.166 gif virgo_heart_J.fits
4 1 2455.0 4475.0 187.38193 13.50986 7.0 1.000 0.0 j 16.370 0.335 gif virgo_heart_J.fits
5 1 3725.0 4718.0 187.02057 13.57827 7.0 1.000 0.0 j 15.307 0.127 gif virgo_heart_J.fits
5 1 3542.0 4255.0 187.07278 13.44991 7.0 1.000 0.0 j 15.759 0.191 gif virgo_heart_J.fits
6 1 4750.0 4674.0 186.72766 13.56625 7.0 1.000 0.0 j 14.976 0.094 gif virgo_heart_J.fits
9 1 6546.0 5069.0 186.21410 13.67506 7.0 1.000 0.0 j 16.010 0.240 gif virgo_heart_J.fits
10 1 7328.0 4579.0 185.99107 13.53795 7.0 1.000 0.0 j 15.777 0.194 gif virgo_heart_J.fits
3 2 2176.0 3506.0 187.46249 13.24109 7.0 1.000 0.0 j 16.138 0.270 gif virgo_heart_J.fits
3 2 2192.0 3464.0 187.45790 13.22943 7.0 1.000 0.0 j 16.125 0.267 gif virgo_heart_J.fits
4 2 2602.0 3691.0 187.34100 13.29270 7.0 1.000 0.0 j 14.130 0.045 gif virgo_heart_J.fits
6 2 4701.0 3752.0 186.74188 13.30987 7.0 1.000 0.0 j 15.020 0.098 gif virgo_heart_J.fits
8 2 5934.0 3456.0 186.39011 13.22714 7.0 1.000 0.0 j 15.450 0.144 gif virgo_heart_J.fits
8 2 5689.0 3350.0 186.46008 13.19783 7.0 1.000 0.0 j 15.042 0.100 gif virgo_heart_J.fits
1 3 37.0 2930.0 188.07220 13.07917 7.0 1.000 0.0 j 15.796 0.198 gif virgo_heart_J.fits
3 3 1998.0 2945.0 187.51292 13.08515 7.0 1.000 0.0 j 16.223 0.292 gif virgo_heart_J.fits
4 3 2782.0 2828.0 187.28929 13.05277 7.0 1.000 0.0 j 15.587 0.163 gif virgo_heart_J.fits
4 3 2659.0 3099.0 187.32448 13.12827 7.0 1.000 0.0 j 16.308 0.316 gif virgo_heart_J.fits
6 3 4304.0 2501.0 186.85532 12.96243 7.0 1.000 0.0 j 16.010 0.240 gif virgo_heart_J.fits
7 3 5194.0 2512.0 186.60162 12.96528 7.0 1.000 0.0 j 14.986 0.095 gif virgo_heart_J.fits
7 3 5473.0 3081.0 186.52184 13.12322 7.0 1.000 0.0 j 15.810 0.200 gif virgo_heart_J.fits
8 3 6324.0 2911.0 186.27922 13.07549 7.0 1.000 0.0 j 16.356 0.330 gif virgo_heart_J.fits
9 3 6853.0 3190.0 186.12810 13.15257 10.0 1.000 0.0 j 15.166 0.159 gif virgo_heart_J.fits
9 3 7067.0 2649.0 186.06758 13.00209 7.0 1.000 0.0 j 16.430 0.353 gif virgo_heart_J.fits
10 3 7271.0 2893.0 186.00916 13.06967 7.0 1.000 0.0 j 15.863 0.210 gif virgo_heart_J.fits
10 3 7272.0 2782.0 186.00899 13.03911 7.0 1.000 0.0 j 16.167 0.278 gif virgo_heart_J.fits
1 4 479.0 2166.0 187.94528 12.86774 7.0 1.000 0.0 j 15.689 0.179 gif virgo_heart_J.fits
1 4 392.0 1866.0 187.96973 12.78403 7.0 1.000 0.0 j 16.108 0.263 gif virgo_heart_J.fits
2 4 1368.0 1565.0 187.69145 12.70137 7.0 1.000 0.0 j 15.909 0.219 gif virgo_heart_J.fits
3 4 2094.0 2147.0 187.48506 12.86355 7.0 1.000 0.0 j 18.527 2.432 gif virgo_heart_J.fits
4 4 2778.0 1785.0 187.29031 12.76360 7.0 1.000 0.0 j 15.844 0.207 gif virgo_heart_J.fits
5 4 3386.0 2002.0 187.11690 12.82377 7.0 1.000 0.0 j 14.413 0.057 gif virgo_heart_J.fits
5 4 3701.0 2270.0 187.02718 12.89826 7.0 1.000 0.0 j 15.190 0.114 gif virgo_heart_J.fits
6 4 4039.0 2133.0 186.93086 12.86022 7.0 1.000 0.0 j 15.630 0.170 gif virgo_heart_J.fits
6 4 4267.0 1673.0 186.86594 12.73243 7.0 1.000 0.0 j 15.640 0.171 gif virgo_heart_J.fits
6 4 4441.0 1774.0 186.81638 12.76047 7.0 1.000 0.0 j 15.723 0.185 gif virgo_heart_J.fits
7 4 5455.0 2137.0 186.52740 12.86100 7.0 1.000 0.0 j 15.339 0.130 gif virgo_heart_J.fits
8 4 5968.0 1977.0 186.38133 12.81656 7.0 1.000 0.0 j 15.658 0.174 gif virgo_heart_J.fits
9 4 6557.0 2305.0 186.21327 12.90670 7.0 1.000 0.0 j 15.530 0.155 gif virgo_heart_J.fits
10 4 7485.0 1651.0 185.94949 12.72472 7.0 1.000 0.0 j 15.168 0.112 gif virgo_heart_J.fits
10 4 7815.0 1922.0 185.85518 12.79935 7.0 1.000 0.0 j 15.633 0.170 gif virgo_heart_J.fits
1 5 398.0 778.0 187.96681 12.48181 10.0 1.000 0.0 j 14.511 0.088 gif virgo_heart_J.fits
1 5 79.0 820.0 188.05763 12.49311 7.0 1.000 0.0 j 15.916 0.221 gif virgo_heart_J.fits
2 5 1380.0 360.0 187.68706 12.36664 7.0 1.000 0.0 j 13.205 0.024 gif virgo_heart_J.fits
3 5 1739.0 714.0 187.58521 12.46525 7.0 1.000 0.0 j 15.109 0.106 gif virgo_heart_J.fits
3 5 2025.0 623.0 187.50378 12.44016 7.0 1.000 0.0 j 15.677 0.177 gif virgo_heart_J.fits
3 5 2010.0 620.0 187.50806 12.43904 7.0 1.000 0.0 j 15.997 0.238 gif virgo_heart_J.fits
3 5 2240.0 961.0 187.44281 12.53446 7.0 1.000 0.0 j 15.510 0.152 gif virgo_heart_J.fits
4 5 2664.0 446.0 187.32195 12.39132 7.0 1.000 0.0 j 16.037 0.246 gif virgo_heart_J.fits
6 5 4590.0 801.0 186.77411 12.49016 7.0 1.000 0.0 j 16.249 0.299 gif virgo_heart_J.fits
6 5 4090.0 803.0 186.91637 12.49077 7.0 1.000 0.0 j 15.788 0.196 gif virgo_heart_J.fits
7 5 4972.0 886.0 186.66512 12.51368 10.0 1.000 0.0 j 14.290 0.073 gif virgo_heart_J.fits
1 6 75.0 267.0 188.05811 12.33949 7.0 1.000 0.0 j 15.771 0.193 gif virgo_heart_J.fits
1 6 14.0 195.0 188.07536 12.31941 7.0 1.000 0.0 j 15.653 0.174 gif virgo_heart_J.fits
1 6 53.0 138.0 188.06421 12.30363 7.0 1.000 0.0 j 15.823 0.203 gif virgo_heart_J.fits
3 6 2303.0 202.0 187.42448 12.32337 7.0 1.000 0.0 j 15.929 0.223 gif virgo_heart_J.fits
4 6 2895.0 90.0 187.25612 12.29224 7.0 1.000 0.0 j 15.886 0.215 gif virgo_heart_J.fits
7 6 5562.0 397.0 186.49776 12.37761 7.0 1.000 0.0 j 15.263 0.122 gif virgo_heart_J.fits
8 6 5864.0 168.0 186.41228 12.31383 10.0 1.000 0.0 j 14.385 0.079 gif virgo_heart_J.fits
8 6 6190.0 112.0 186.31906 12.29807 7.0 1.000 0.0 j 15.171 0.112 gif virgo_heart_J.fits
8 6 6244.0 154.0 186.30396 12.30998 7.0 1.000 0.0 j 16.308 0.316 gif virgo_heart_J.fits
10 6 7375.0 469.0 185.98206 12.39622 7.0 1.000 0.0 j 15.925 0.222 gif virgo_heart_J.fits

See the Missing Galaxies Summary in the Virgo Main Page.

[Last Updated: 2002 Oct 10 ; by Tom Jarrett]