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Table 1.

Log of the observations used in this paper. The last column refers to the presence or absence of the underlying GRB-SN.

Date Instrument Band Exposure Spatial res. Spectral res. GRB/SN?
20 March 2018 MUSE/VLT 4650–9300 Å 4 × 900 s 0 . 7 $ 0{{\overset{\prime\prime}{.}}}7 $ 171−80 km s−1 Yes
3 April 2019 PMAS/CAHA 4700–7700 4 × 900 s 1 . 0 $ 1{{\overset{\prime\prime}{.}}}0 $ ∼200 km s−1 Companion!
14 Feb. 2019 X-shooter/VLT 3000–20 000 8 × 300 s (Longslit) 55−34 km s−1 No

25 Dec. 2017 HST F300X 1044 s 0 . 10 $ 0{{\overset{\prime\prime}{.}}}10 $ Yes
2 July 2018 HST F300X 2400 s 0 . 10 $ 0{{\overset{\prime\prime}{.}}}10 $ Yes
2 July 2018 HST F475W 1200 s 0 . 10 $ 0{{\overset{\prime\prime}{.}}}10 $ Yes
2 July 2018 HST F606W 1050 s 0 . 10 $ 0{{\overset{\prime\prime}{.}}}10 $ Yes
2 Dec. 2019 HST F300X 2400 s 0 . 10 $ 0{{\overset{\prime\prime}{.}}}10 $ No
2 Dec. 2019 HST F475W 1083 s 0 . 10 $ 0{{\overset{\prime\prime}{.}}}10 $ No
2 Dec. 2019 HST F606W 1083 s 0 . 10 $ 0{{\overset{\prime\prime}{.}}}10 $ No

7/8 Dec. 2017 ALMA CO(1–0) 4.9 h 0 . 31 × 0 . 24 $ 0{{\overset{\prime\prime}{.}}}31 \times 0{{\overset{\prime\prime}{.}}}24 $ 10 km s−1 Yes (1)
11 Feb./15 Mar. 2018 GMRT H I 12 h 13″ × 19″ 7 km s−1 Yes (1)
9 Mar./4 May 2019 JVLA H I 10.5 h 7 . 1 × 6 . 3 $ 7{{\overset{\prime\prime}{.}}}1 \times 6{{\overset{\prime\prime}{.}}}3 $ 0.8 km s−1 No

Notes.

(1)

GRB not visible after continuum subtraction.

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