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Bands in optical data in the AAVSO International Database

Bands in optical data in the AAVSO International Database (AID)

Each variable star observation in the AID contains a field that specifies the band (filter) used in making the observation.

For data downloaded from the AID using the data-download tool, the band is given as an abbreviation (e.g., visual is Vis, Johnson V is V).

In special cases, the band (e.g. visual) may be represented as a number (e.g., 0). The following numbers represents the following bands:

0 = Visual (Vis.)
1 = Unknown (N/A)
2 = Johnson V (V)
3 = Johnson B (B)
4 = Cousins R (R)
5 = Cousins I (I)
6 = Orange (Orange)
7 = Johnson U (U)
8 = Unfiltered with V Zeropoint (CV)
9 = Unfiltered with Red Zeropoint (CR)
10 = Johnson R (RJ)
11 = Johnson I (IJ)
21 = blue (Blue-Vis.)
22 = green = (Green-Vis.)
23 = red (Red-Vis.)
24 = yellow (Yellow-Vis.)
26 = K NIR 2.2micron (K)
27 = H NIR 1.6micron (H)
28 = J NIR 1.2micron (J)
29 = Sloan z (SZ)
30 = Stromgren u (STU)
31 = Stromgren v (STV)
32 = Stromgren b (STB)
33 = Stromgren y (STY)
34 = Stromgren Hbw (H-beta = wide) (STHBW)
35 = Stromgren Hbn (H-beta = narrow) (STHBN)
40 = Sloan u (SU)
41 = Sloan g (SG)
42 = Sloan r (SR)
43 = Sloan i (SI)
50 = Tri-Color Blue (TB)
51 = Tri-Color Green (TG)
52 = Tri-Color Red (TR)
55 = Optec Wing A (MA)
56 = Optec Wing B (MB)
57 = Optec Wing C (MI)

For data-downloaded AAVSO data format information, please see here. For data submission information, please see WebObs.

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