2MASS apparent and absolute magnitudes of V1721 Aql progenitor (candidate), colours, and de-reddened colours of the near-IR source located at the position of the nova.
|Filter||Apparent magnitude||Absolute magnitude||Colour||Value||De-reddened value|
|J||16.6 ± 0.2||1.8 ± 0.6||J − Ks||2.0 ± 0.2||0.1 ± 0.2|
|H||15.5 ± 0.1||1.7 ± 0.6||J − H||1.2 ± 0.2||0.0 ± 0.2|
|K s||14.7 ± 0.1||1.7 ± 0.6||H − Ks||0.8 ± 0.2||0.1 ± 0.2|
Notes. The extinction towards the nova has been taken as AV = 11.6, and its distance as 2.2 kpc.
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