Meaning of the Source Association Fields
(from IRAS documents ar IPAC)
Catalog Field and Meaning
1 GCVS
TypeBlank
Field1Code gives meaning for Fields 2-3
if Field1 = 1Field2 and Field3 are B mag [decimag] at max, min
if Field1 = 2Field2 and Field3 are V mag [decimag] at max, min
if Field1 = 3Field2 and Field3 are photographic mag [decimag] at max,min
if Field1 = 4Field2 and Field3 are estimated V mag [decimag] at max,min
if Field1 = 5Field2 is -999 and Field3 is 0
2 Dearborn Obs.
TypeBlank
Field1Code for Field2 (1,2)
Field2if Field1 is 1, Field2 is red magnitude [decimag]
Field3if Field1 is 2, Field2 is -999
3 Revised AFGL
TypeBlank
Field1Magnitude at 4.2 microns [decimag]
Field2Magnitude at 11 microns [decimag]
Field3Magnitude at 27 microns [decimag]
4 2-micron Sky Survey
TypeBlank
Field1K magnitude [decimag]
Field2I magnitude [decimag]
Field30
5 Globules (Wesselius)
TypeBlank
Field1-999
Field2Minimum diameter [arcsec]
Field3Minimum diameter [arcsec]
6 R C 2
TypeBlank
Field1Harvard V magnitude [decimag]
Field2B_T [decimag]
Field3D_o [arcsec]
7 Stars with em. lines
TypeBlank
Field1V magnitude [decimag]
Field2-999
Field30
8 Equatorial IR Cat.
TypeBlank
Field1Flux density [10-16 W cm-2 micron] at 2.7 microns
Field2-999
Field30
9 UGC
TypeBlank
Field1Zwicky magnitude [decimag]
Field2Minimum diameter [arcsec] in B
Field3Minimum diameter [arcsec] in B
10 MCG
TypeBlank
Field1-999
Field2Minimum diameter [arcsec] in B
Field3Minimum diameter [arcsec] in B
11 Strasbourg Planetary Nebulae
TypeBlank
Field1V magnitude of Nebula [decimag]
Field2B magnitude of Central Star [decimag]
Field3Minimum diameter of Nebula [arcsec]
12 Zwicky
TypeBlank
Field1Zwicky magnitude [decimag]
Field2-999
Field30
13 SAO
TypeSpectral Type
Field1V magnitude [decimag]
Field2p_g magnitude [decimag]
Field30
14 ESO/UPPSALA
TypeFirst 3 characters of object type
Field1B magnitude [decimag]
Field2Maximum diameter [arcsec]
Field3Minimum diameter [arcsec]
15 Bright Stars
TypeSpectral Type
Field1V magnitude [decimag]
Field2B-V [centimag]
Field3U-B [centimag]
16 Suspected Var.
TypeSpectral Information
Field1V magnitude at maximum [decimag]
Field2-999
Field30
17 Carbon Stars
TypeSpectral Type (may be truncated)
Field1p_g magnitude [decimag]
Field2V magnitude [decimag]
Field3I magnitude [decimag]
18 Gliese
TypeSpectral Type (may be truncated)
Field1V magnitude [decimag]
Field2B-V magnitude [millimag]
Field3U-B magnitude [millimag]
19 S Stars
TypeBlank
Field1p_g magnitude [decimag]
Field2V magnitude [decimag]
Field3I magnitude [decimag]
20 Parkes HII Survey
TypeBlank
Field1-999
Field2Minimum diameter [arcsec]
Field3Maximum diameter [arcsec]
21 Bonn HII Survey
TypeBlank
Field1Flux density at 4.875 GHz (Jy)
Field2Diameter [arcsec]
Field30
22 Blitz
TypeBlank
Field1Diameter [arcsec]
Field2V_CO [km/s]
Field3Peak T_A [Kelvin]
23 OSU
TypeBlank
Field1-999
Field2-999
Field3Diameter [arcsec]
24 IRC w/good pos.
TypeC if 2.2-microns sources are possibly confused, blank otherwise
Field1Right ascension difference (IRC-IRAS ) [deciseconds of time]
Field2Declination difference (IRC-IRAS )[arcsec]
Field30
25 DDO
TypeBlank
Field1-999
Field2-999
Field30
26 Arp
TypeBlank
Field1-999
Field2-999
Field30
27 Markarian
TypeBlank
Field1-999
Field2-999
Field30
28 Strong 5 GHz
TypeObject type (GAL or QSO)
Field1V magnitude [decimag]
Field25 GHz flux density [deciJy]
Field30
29 Veron-Cetty Veron
TypeObject classification
Field1V magnitude [decimag]
Field2Redshift x 1000
Field30
30 Zwicky 8 Lists
TypeBlank
Field1-999
Field2-999
Field30
31 VV
TypeBlank
Field1Special flag (see below)
Field2-999
Field30
32 IRAS Small-Scale Structure
TypeBlank
Field1Hex-coded bands
Field2-999
Field3-999
39* OSU Radio
TypeBlank
Field1Frequency
Field2Flux [deciJy]
Field30
40 Michigan Spectral
TypeClass**
Field1Mag [decimag]
Field2HD number [low byte]
Field3HD number [high byte]
41 Serendipitous Survey
TypeBlank
Field1Hex-coded SSC bands
Field2First SSC flux density [mJy]***
Field3Second SSC flux density
42 PSC II
TypeBlank
Field1Hex-coded PSC bands
Field2First PSC flux density [mJy]***
Field3Second PSC flux density [mJy]
48 Virgo Cluster Catalog
TypeClass**
Field1B_T magnitude [decimag]
Field2Heliocentric velocity [km/s] (-999 when not available)
Field3Source size 100 x log D_est(.1 arcsec)
49 Dressel and Condon
TypeBlank
Field1-999
Field2-999
Field3-999
50 Asteroids
TypeBlank
Field1-999
Field2First four digits of crossing time [seconds, since 1980.0]
Field3Last four digits of crossing time
VV Catalog Flags (Catalog 31)
10 VV 10 has the same coordinates as VV29 in the VV Atlas. The UGC was used to confirm that the coordinate is correct for VV 29 and erronerous for VV 10. The UGC position for VV 10 = TGC 10814 was adopted.
11 The VV position is substantially different (> 400 arcsec) from positions for the object in other catalogs. The VV position has been assumed to be in error because two or more other catalogs agree on a different position. The UGC position has been adopted.
12 Same as for 11, but the OSU position has been adopted.
13 The position in the VV Atlas, and the position listed for the VV object in the OSU are in disagreement. The true position has been established to be close to that of the OSU by the use of overlay transparencies on the POSS. The OSU position has been adopted.
14 Same as for 13, but the OSU position is not very good either, so a new position has been measured (accurate to about 1 arcsec.)
-999 No information given