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Table C.1

X-ray properties of STONKS alert sources from Multi-Year Heritage Project observations of the Galactic Plane. Locations and flux values are as per the source details in the XMM Science Archive.

Alert Src. No. OBSID Source RA DEC Error (′′) 4XMM DR14 Ident. Alert Class Spectral Flux True Alert
1 0886010101 12 17:38:27.90 −29:28:41.5 0.7 J173828.0-292842 FD Y 2.58 Y
2 0886010401 3 17:45:24.98 −30:47:50.7 0.4 J174525.0-304750 FD Y 2.46 Y
3 0886010401 4 17:45:55.32 −30:42:40.3 0.6 J174555.4-304240 FD N 0.90 Y
4 0886010401 9 17:46:23.34 −20:37:58.6 0.8 J174623.4-303758 H Y 1.60 N
5 0886010501 3 17:44:05.03 −30:39:54.2 0.5 J174405.0-303952 FD Y 4.57 Y
0886010801 11 17:38:41.46 −30:14:57.2 0.9 J173841.4-301458 H Y 2.08 Y
6 0886121201 10 17:38:41.48 −30:14:59.7 0.9 H Y 2.35 Y
7 0886011001 10 17:39:59.62 −30:38:46.8 1.2 J173959.5-303847 L N 0.28 N
8 0886020501 23 17:39:47.40 −31:01:51.3 1.3 J173947.4-310152 FD Y 4.12 Y
9 0886040201 1 17:34:09.69 −32:29:47.2 0.6 J173409.6-322946 FD N 1.85 Y
0886040201 20 17:34:06.23 −32:28:58.4 0.9 FD Y 1.54 Y
0934200401 3 17:34:06.24 −32:28:53.1 1.2 J173406.1-322857 FD Y 5.02 Y
0934201001 19 17:34:06.22 −32:28:53.4 2.3 FD Y 3.03 Y

Notes. Alert classes align with those possible through the STONKS pipeline: H – High flux state, L – Low flux state, FD – First detection, PV – Past variability. The spectral column identifies those sources where the spectrum deviates significantly from the assumptions made in pipeline flux estimations. Fluxes are stated in units of 10−13 erg s−1 cm−2. The final column identifies those STONKS alerts which may be as the result of spectral assumptions between different instruments and not truly caused by significant flux variability: Y – Likely a true flux variation, N – Likely a false variation due to spectral assumptions, ? – Possibly a false variation. The full Table is available at the CDS.

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