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DP = dirty picture Dust specks or dirt are evident on the finding chart. PD = plate defect This can be on the PSS plate, the 35mm negative or the finding chart print. LP = light picture The print of the finding chart is somewhat overexposed but the grains of the PSS plate are visible. VLP = very light picture The print of the finding chart is very overexposed. The grains of the PSS plate are barely visible. CH = crosshairs The finding chart has closed rather than open crosshairs. CF = crowded field OF = obscured field The field within the 4.14" search radius is partially obscured.
-------------------------------------------------------------------- Character | Optical Characteristics of the Identifications in Groups -------------------------------------------------------------------- first B = Brightest member M = member second C = Compact group. The galaxies are separated by only a few galaxy diameters. M = Medium compact group. The galaxies are separated by about 5 to 10 galaxy diameters. third 1 = one first ranked galaxy. 2 = two approximately equal magnitude first ranked galaxies. 3 = three or more approximately equal magnitude first ranked galaxies. fourth S = small group, 5 galaxies. M = medium group, 5 to 10 galaxies. L = large group, > 10 galaxies. C = cluster, >> 10 galaxies.
Identifications Within 2 Arcmin of Known Clusters of Galaxies The letter preceding the cluster catalog number: a = Abell Cluster z = Zwicky Cluster The notations following the catalog number: cc = at cluster center nc = not at cluster center mc = near cluster center ni = not identified with probable cluster member c: = cluster not obvious on finding chart ef = identification is EF (empty field) ============================================================= Identifications From Veron-Cetty & Veron or Wills & Wills v = Identification from Veron-Cetty and Veron (1983) w = Identification from Wills and Wills (unpublished) Followed by one or more of the symbols listed below: q = Identification is probably a QSO or BL Lac Object g = Identification is probably a galaxy z = Identification is confirmed by spectrum giving redshift s = Identification is confirmed to be a star e = Veron-Cetty & Veron list an empty field at the source position x = For Veron-Cetty & Veron, I disagree with the identification : = For Veron-Cetty & Veron, the agreement with the TS identification is questionable : = For Wills and Wills, the spectroscopic data suggests but does not confirm the identification