Investigating photometric and spectroscopic variability in the multiply imaged little red dot A2744-QSO1

Open Access

Table 3.

JWST/NIRSpec emission line results for each image of A2744-QSO1 in each epoch of available spectroscopy (see Table 2).

Line	Image A		Image B	Image C

	Epoch 7	Epoch 8

	EW₀ [Å]

Hβ	$48_{- 2}^{+ 2}$ $48_{-2}^{+2}$	$53_{- 4}^{+ 4}$ $53_{-4}^{+4}$	$50_{- 2}^{+ 2}$ $50_{-2}^{+2}$	$62_{- 5}^{+ 5}$ $62_{-5}^{+5}$
Hα	$285_{- 6}^{+ 7}$ $285_{-6}^{+7}$	$289_{- 8}^{+ 9}$ $289_{-8}^{+9}$	$307_{- 5}^{+ 4}$ $307_{-5}^{+4}$	$346_{- 11}^{+ 11}$ $346_{-11}^{+11}$

	F_line [10⁻¹⁹ erg cm⁻² s⁻¹]

Hβ	2.7 ± 0.2	2.9 ± 0.3	2.4 ± 0.3	2.9 ± 0.3
Hα	20.2 ± 0.8	24.7 ± 1.1	18.3 ± 1.4	24.7 ± 1.1

	$f_{λ, continuum} [10^{- 22} erg {cm}^{- 2} s^{- 1} Å^{- 1}]$ $f_{\lambda,\mathrm{continuum}}~[10^{-22}\,\mathrm{erg}\,\mathrm{cm^{-2}\,s^{-1}\,\mathrm{\AA}^{-1}}]$

Hβ	6.9 ± 0.3	6.7 ± 0.3	5.6 ± 0.2	4.8 ± 0.4
Hα	8.8 ± 0.3	10.6 ± 0.4	6.7 ± 0.2	6.6 ± 0.5

Notes. The line fluxes and underlying continuum flux densities are de-magnified, but the EWs are independent of magnification.

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