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Table 2

Summary of the background stars and available measurements.

Central star Background starsa

star # YSO 2 10 20 84 90 112 947
Ra 19 37 00 19 36 57 19 36 54 19 37 01 19 36 56 19 36 57 19 36 57 19 36 58
Dec 07 34 10 07 35 23 07 33 49 07 32 43 07 33 44 07 35 16 07 33 30 07 33 59
Teff 3800 4000 9200 6000 9800 6400 3050

Photometry Central Flux [mJy]
wavelength [μm]

NTT-EMMI
U602 0.354 0.004 0.010 0.074 0.003 0.005 0.003 .
Bb605 0.413 0.12 0.22 0.35 0.021 0.035 0.019 .
g772 0.509 0.71 0.92 0.85 0.08 0.087 0.06 .
r773 0.673 11.5 7.7 4.8 0.69 0.54 0.49 0.026
I610 0.798 23 11 6.1 1.0 0.75 0.73 0.34
2MASS
J 1.258 257 55 29 5.9 4.8 4.6 73
H 1.650 612 85 39 10 6.8 7.2 357
Ks 2.157 661 78 35 9.3 7.1 6.5 627
SIRCA 3.79 . . . . . . 453
Spitzer
IRAC1 3.550 . 38 15 4.3 3.6 3.0 .
IRAC2 4.493 220 22 9.8 2.8 2.5 2.0 .
IRAC3 5.731 169 16 6.7 1.5 1.9 1.3 243
IRAC4 7.872 93 8.9 3.5 0.8 1.2 0.7 149
MIPS 23.7 9.9 0.85 0.2: . 0.1: 0.1: 35

Spectrometry Wavelength Spectral resolution R
range [μm]

NTT-EMMI 0.4 < λ < 0.8 + + + R ≃ 400 + + +
VLT-ISAAC 2.55 < λ < 4.2 . . . . . . R ≃ 600
VLT-ISAAC 4.45 < λ < 5.1 . . . . . . R ≃ 3300
ISOCAM-CVF 5 < λ < 16.5 . . . . . . 100 < R < 240
Spitzer-IRS    7 < λ < 14 60 < R < 120 . . . . . .
Spitzer-IRS 14 < λ < 21 60 < R < 120 . . . . . 60   < R < 120

Notes. 

(a)

Numbers refer to star positions in Fig. 1.

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