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Near infrared photometry of Galactic planetary nebulae with the VVV Survey

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Fig. 1. Transmission curves for the Z, Y and J broad-band filters (the effective wavelengths are 0.878, 1.021 and 1.254 μm respectively), the filters are multiplied by a model atmosphere
Table 1. Line contribution from the (unreddened) NGC 6720 model results.
Fig. 2. Comparison between 2MASS and VVV PNe magnitudes.
Fig. 4. Distribution of the colour indices (Y − J) and (Z − Y). The upper panel show all detected PNe without applying any extinction  correc-tion
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