An upper limit for the water outgassing rate of the main-belt comet 176P/LINEAR observed with Herschel/HIFI

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Table 1

Standard deviation of the brightness temperature and line area, and retrieved 3-σ upper limits of the H₂O production rate in 176P/LINEAR.

Spectrometer	σ _{T_mB}		Q_H₂O^a
	(K)	(K kms^-1)	(mol s^-1)

WBS	6.598 × 10^-4	6.172 × 10^-4	<2.08 × 10²⁵
HRS	1.998 × 10^-3	6.365 × 10^-4	<2.14 × 10²⁵

Notes.

^(a)

Production rates derived for a gas kinetic temperature of 20 K, expansion velocity of 0.5 kms^-1, and an electron density scaling factor of x_{n_e} = 0.2.

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