Mid-infrared evolution of η Carinae from 1968 to 2018

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Table 1.

Mid-IR flux densities of the spatially integrated Homunculus nebula (2003–2018) around η Car.

Filter	Wavelength	Date	Flux	Error flux
			density	density ^(a)
	(μm)		(Jy)	(Jy)
		VISIR
J7.9	7.78	2018-05-21	9648	30
PAH1	8.59	2018-04-28	19 280	40
ArIII	8.99	2018-12-10	31 140	80
SIV_1	9.82	2018-05-21	51 030	220
SIV	10.49	2018-04-29	54 520	160
PAH2	11.25	2018-12-10	66 660	210
B12.4	12.47	2018-04-29	53 930	230
NeII	12.81	2018-12-10	63 120	470
NeII_2	13.04	2018-12-10	58 410	450
Q1	17.65	2018-05-11	93 040	2690
Q2	18.72	2018-05-11	100 810	3550
Q3	19.50	2018-05-11	97 380	9940

PAH2	11.25	2005-01-23	61 350	390
NeII ^(b)	12.81	2005-01-23	44 420	1050

		TIMMI2 ^(c)
M	4.6	2003	3590	1230
N7.9	7.9	2003	13 260	3880
N8.9	8.7	2003	23 650	7810
N9.8	9.6	2003	40 590	2840
N10.4	10.3	2003	47 710	5060
N11.9	11.6	2003	63 360	6980
N12.9	12.3	2003	60 000	6100
[NeII]	12.8	2003	80 960	8170
Q1	17.8	2003	122 190	15 190

Notes.

^(a)

Formal errors from the flux calibration. Systematic uncertainties due to sky variability and detector artifacts can be larger than 10% for N band and 20% for Q band.

^(b)

Observations are strongly affected by ghosts.

^(c)

Average of observations in January, March, and May 2003. The data are badly affected by stripe patterns.

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