SDSS1335+0728: The awakening of a ∼106 M⊙ black hole

Open Access

Fig. 8.

Spectra of SDSS1335+0728. Top: full spectra observed by SDSS (2007; blue), LAMOST (2015; red), Goodman (2021 and 2024; yellow and pink), X-shooter (2022; green), and LRIS (2023, $0 \overset{″}{.} 7$ $0{{\overset{\prime\prime}{.}}}7$ ; purple). The original X-shooter spectrum is shown in grey and the box smooth (with a window of 10 pixels) binned spectrum is shown in green. Bottom: the left panel shows a zoom around the Hβ line region, and the right panel shows a zoom around the Hα line region.

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