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Table A.3

Photometric transformations blue/red magnitudes (BJ/Rf) to Gaia G/RVS/red/blue magnitudes (G/GRVS/GRP/GBP).

01 RF/BJ = value GSC23; σ = 0.3
02 RF/BJ = value PPMXL; σ = 0.4
10 = V − 0.0478 − 0.5739(B − V) − 0.0938(B − V)2 − 0.4606(B − V)3 + 0.8419(B − V)4 − 0.3472(B − V)5;σ = σB
11 R F = R − 0.0066 − 0.0563(V − R) − 0.2505(V − R)2 + 0.3912(V − R)3 − 0.0707(V − R)4;σ = σV
12 R F =
13 = V + 0.0036 + 0.8768(B − V) − 0.0594(B − V)2;σB = σB
14 BJ = R − 0.0480 + 2.4850(V − R) − 0.8760(V − r)2 + 2.9117(V − r)3 − 3.4144(V − r)4 + 1.11850(V − r)5;σ = σV
15 BJ =
16 = VT − 0.0478 − 0.578(BT − VT) − 0.0677(BT − VT)2 − 0.2828(BT − VT)3 + 0.4395(BT − VT)4 + 0.1541(BT − VT)5;σ = σVT
17 = VT − 0.0036 + 0.655(BT − VT) − 0.0429(BT − VT)2;σ = σBT
18 R F =
19 B J =
20 B J = Vp + 0.3608 + 1.40985(Vp − RF);σ = 0.5
21 BJ = RF + 0.3841 + 1.97440(RF − IN);σ = 0.5
28 G =
29 G RVS =
30 G =
31 GRVS =
32 G =
33 G RVS =
41 BJ = J + 4.9816 − 0.38945670(J − K);σ = 0.5
42 R F = J + 2.6997 − 0.46257863(J − K);σ = 0.5
50 G d =
51 =
52 G c = V − 0.0247 − 0.2888(B − V) − 0.0353(B − V)2 − 0.0839(B − V)3;σ = 0.6
54 G =
55 = V − 0.1333 − 1.4654(B − V) − 0.1075(B − V)2 − 0.0768(B − V)3;σ = 0.6
57 G RVS =
58 G e =
59 =
60 =
61 =
62 =
63 =
64 G RP =
65 G BP =
66 = V − 0.0629 − 1.2352(B − V) + 0.1614(B − V)2 − 0.1016(B − V)3;σ = 0.6
67 = V − 0.0442 + 0.4419(B − V) − 0.1637(B − V)2 + 0.0077(B − V)3;σ = 0.6
68 G RP =
69 G BP =
70 G RP =
71 G BP =
72 G RP =
73 G BP =
80 G = value and sigma from GEPC
81 G RVS = value and sigma from GEPC
83 G BP = value and sigma from GEPC
84 G RP = value and sigma from GEPC

Notes. The σ represents the transformation error, and if significant, we add in quadrature the published errors. Equations (10)–(21) were determined from a combination of Johnson - GSC2 transformations derived internally and Tycho - Johnson transformations published in the “Guide to the Tycho-2 Catalog” (Hog et al. 2000, http://www.astro.ku.dk/~erik/Tycho-2/). Equations 41/42 were calculated internally from a GSC23 to 2MASS match. Other equations between 28−57 were taken from Jordi (2012) combined with Høg et al. (2000) and internal transformations where needed.

(a)

Valid only for (B − V) < 2.5;

(b)

valid only for (BT − VT) < 2.5.;

(c)

only used with SKY2000 magnitudes when others not available;

(d)

used for objects with declination >= 0;

(e)

used for objects with declination <0. B,V,R,I = published Johnson-Cousins magnitudes; g,r,i = SDSS magnitudes; VT,BT = Tycho magnitudes; J,K= 2MASS magnitudes; BJ,RF are GSC23/PPMXL measured or estimated magnitudes.

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