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Table B.1

Coordinates of the Spitzer IRS observations used to extract the background spectra.

RA (J2000) Dec (J2000)

17 h 22 m 37 94 −23 ° 48 ′ 51 6
17 h 22 m 45 15 −23 ° 48 ′ 39 6
17 h 22 m 40 31 −23 ° 48 ′ 55 7
17 h 22 m 41 62 −23 ° 50 ′ 26 4
17 h 22 m 39 04 −23 ° 50 ′ 36 4
17 h 22 m 37 93 −23 ° 49 ′ 24 7
17 h 22 m 38 80 −23 ° 49 ′ 14 5
17 h 22 m 39 05 −23 ° 50 ′ 00 8
17 h 22 m 39 05 −23 ° 50 ′ 36 6
17 h 22 m 37 94 −23 ° 49 ′ 24 9
17 h 22 m 45 03 −23 ° 48 ′ 53 3
17 h 22 m 44 87 −23 ° 49 ′ 04 7
17 h 22 m 44 14 −23 ° 49 ′ 16 8

Notes. Apertures of 5 detector pixels in size corresponding to 9′′ were placed 20′′ left and right (in the detector frame) from the nominal target position to avoid contamination from the stellar object a given observation was aimed at. The slit width was . The coordinates are given in the order of Fig. B.1.

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