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Table 1

Red CMZ objects observed with Gemini/GNIRS.

Object ID (SSTGC) RA (J2000) (h:m:s) Dec (J2000) (d:m:s) Obs. date (UTC) Wavelength range a Mid-IR classification b
372630 17:44:42.76 −29:23:16.19 19 July 2022 L Possible YSO
425399 17:45:02.90 −29:22:11.36 19 June 2017 K AGB star (background?)c
21 June 2017 L
524665 17:45:39.86 −29:23:23.39 22 July 2022 L YSO
563780 17:45:54.15 −28:58:12.39 6 August 2022 L Possible YSO
9 August 2022 L
619522 17:46:14.33 −28:43:18.41 21 July 2022 L Possible YSO
619964 17:46:14.48 −28:36:39.54 19 June 2017 K OH/IR star (background?)c
21 June 2017 L
653270 17:46:26.55 −28:18:59.77 20 June 2017 Ld Possible YSO
679036 17:46:35.98 −28:43:58.19 19 August 2022 L Possible YSO
696367 17:46:42.29 −28:33:26.13 20 June 2017 Ld OH/IR star (background?)c
718757 17:46:50.50 −28:43:33.38 19 August 2022 L Possible YSO
719445 17:46:50.72 −28:31:24.67 2 August 2022 L YSO
728480 17:46:54.13 −28:29:39.51 27 July 2022 L YSO
770393 17:47:11.75 −28:31:21.90 21 July 2022 L YSO
772981 17:47:12.90 −28:32:05.50 5 August 2022 L YSO
799887 17:47:24.80 −28:15:56.80 19 June 2017 K Possible YSO
20 June 2017 L

Notes. (a)Wavelength coverage: K (2.0-2.5 μm), L (2.9-3.9 μm). (b)Mid-IR spectroscopic classifications in An et al. (2011). (c)The object is classified as a star in the literature, but this does not exclude the possibility that it is a background (super-)giant seen through a YSO envelope or a dense cloud core. (d)Supplemented with K-band spectra obtained using NASA IRTF/SpeX.

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