NGC 520 -- Sa galaxy, sky charts (1 degree & 30 arcmin sides) with list of objects below, in order of distance from galaxy at center.

comment on field displayed below: possibly some alignment along the minor axis, but unclear.
   
label coordinates (J2000) dist asec angle E-N type R mag B mag com R psf B psf Name conf assoc QSO pct z flux
0.007 012434.2+034736 20 303 GX 7.7 12.2 p n n KCPG 31A 53 0 0.007 8
0.221 012436.8+034747 31 45 A 19.3 19.9 p n * TEX 0121+035 0.221
0.336 012433.2+034335 232 188 QX 18.6 19.0 p * * E 0121+034 100 95 0.336 354
94 012441.0+034309 269 162 X 19.8 20.4 p * * CXOMPJ012441.0+034308 97 94 80
76 012406.5+034501 455 252 X 20.2 20.5 p n * CXOMPJ012406.3+034501 99 76 13
2.000 012407.8+034345 467 242 QX 20.2 20.0 p * * NGC 520.192 99 95 2.000 22
1.205 012457.5+035349 507 41 QX 18.0 18.3 p * * PB 6421 100 99 1.205 14
68 012405.2+034131 573 232 X 0 21.2 p x * CXOMPJ012405.2+034132 85 68 13
57 012405.5+034022 615 227 X 19.8 22.4 p * * CXOMPJ012405.4+034024 77 57 83
74 012443.9+033644 654 169 X 18.9 21.1 p 1 * CXOMPJ012443.9+033642 90 74 27
TYCHO 012401.0+033949 687 228 SX 11.3 12.0 pv * * TYCHO 24-870-1 99 0 5
0.311 012349.2+034757 691 273 AX 18.3 18.7 p * * NGC 520.D2 88 70 0.311 5
0.923 012412.5+033721 694 210 QX 19.4 19.7 p * * 1WGA J0124.1+0337 100 97 0.923 87
0.882 012454.5+035810 706 24 QX 20.0 21.0 p 1 * 1WGA J0124.8+0358 92 45 0.882 21
0.312 012515.6+033911 779 129 AX 19.1 20.4 p * * 1WGA J0125.2+0339 100 91 0.312 8
91 012350.0+035731 910 312 X 20.3 20.1 p * * 2RXP J012349.7+035730 100 91 13
76 012502.8+033349 914 153 X 0 21.1 p x * CXOMPJ012502.8+033350 94 76 89
90 012421.4+040518 1093 349 X 19.7 20.3 p * * 2RXP J012421.1+040518 95 90 42
95 012450.8+032735 1212 169 X 19.8 19.8 p * * CXOMPJ012450.7+032736 99 95 99
1.405 012513.6+040643 1291 26 Q 18.8 18.7 p * * NGC 520.30 1.405
0.633 012519.0+040636 1323 30 Q 19.2 18.9 p * * NGC 520.31 0.633
1.468 012524.9+040951 1537 29 Q 17.8 18.9 p * * NGC 520.D1 1.468
TYCHO 012454.4+032059 1611 170 SX 12.4 13.6 p * 1 TYCHO 24-400-1 86 0 70
1.670 012303.4+032900 1765 231 Q 18.0 18.4 p * * NGC 520.D9 1.670
0.221 012236.8+034354 1787 263 AX 17.9 19.0 p * * MS 01200+0328 71 71 0.221 132

 

 

Columns of table:

  1. label -- identifier for each optical object displayed on the chart(s) above.
  2. coordinates J2000 -- position on the sky of this optical object, pattern is hhmmss.s±ddmmss, which gives 1 arcsecond precision.
  3. dist asec -- distance (offset in arcseconds) of this object from the central galaxy, i.e. the center of the chart.
  4. angle E-N -- direction from the central galaxy to this object, N thru E, ie. 0 is up, 90 is left, 180 is down, 270 is rightwards.
  5. type -- short description of this object: Q=quasar, B=Bl lac, A=AGN, G=galaxy, S=star, X=X-ray source, R=radio source, 2=double radio lobes.
  6. R mag, B mag -- brightness of this object in red and blue colors respectively, 0=not seen in this color
  7. com -- comment on object: p=blue is POSSI-O violet, (no p)=blue is Bj green or similar, i=red is i, u=blue is u, v=variablility nominally detected, m=proper motion nominally detected, ?=inferred object, calculated from combining APM and USNO-A optical catalogs.
  8. R psf, B psf -- appearance of object in red and blue colors respectively, *=stellar, 1=fuzzy, 2=extended, n=no psf, x=not seen in this color.
  9. Name -- name of this object from the literature, or IAU name from X-ray/radio catalog.
  10. conf assoc -- confidence that this optical object is the true source of the X-ray or radio detection that we list with it. This is the published figure from the QORG catalog, except for XMM or CXOMP X-ray objects which are calculated using the identical technique as used in QORG.
  11. QSO pct -- confidence that this optical object is a QSO specifically, calculated as in (10) above.
  12. z -- the redshift of this object, from the literature. NBCKDE redshifts are photometric only, and rounded to tenths, e.g. 1.700.
  13. flux -- if a radio source, in mJy; if an X-ray source, in counts per hour as listed in ROSAT/CXOMP, XMM normalised to ROSAT (div by 3.5).

 

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