Open Access

Table A.1.

Log of NGC 4631 and NGC 1097 observations.

Label|Filter ObsID Instrument Exp. Date
(ks)
NGC 4631
C1 797 ACIS-S 59.21 2000-04-16
XM1 0110900201 EPIC 54.8 2002-06-28
XM2 0890710101 EPIC 33.0 2021-12-28
C2 25777 ACIS-S 29.03 2022-01-22
C3 25220 ACIS-S 22.77 2022-08-02
C4 26484 ACIS-S 18.82 2022-08-02
C5 26485 ACIS-S 20.80 2022-08-05
C6 26486 ACIS-S 14.88 2022-08-06
C7 26487 ACIS-S 14.88 2022-08-07
C8 25782 ACIS-S 30.66 2023-01-29
C9 25780 ACIS-S 11.92 2023-06-16
C10 25779 ACIS-S 19.82 2023-07-04
C11 25778 ACIS-S 19.81 2023-07-04
C12 25781 ACIS-S 13.60 2023-07-18
XM3 0943790101 EPIC 104.20 2025-07-08

F606W j8r331010 ACS/WFC 0.68 2003-08-03
F814W j8r331020 ACS/WFC 0.70 2003-08-03
F606W jc9l04010 ACS/WFC 2.40 2014-01-21
F814W jc9l04020 ACS/WFC 2.53 2014-01-21

NGC 1097

CH1 2339 ACIS-S 5.34 2001-01-28
CH2 1611 ACIS-S 5.34 2001-01-28
XMM1 922490201 EPIC 33 2023-12-22
CH3 30142 ACIS-S 9.94 2025-05-21
CH4 30937 ACIS-S 9.94 2025-05-21
CH5 30938 ACIS-S 9.94 2025-05-21
CH6 29637 ACIS-S 14.71 2025-05-31
CH7 30948 ACIS-S 14.71 2025-05-31

F814W j8mx03fsq ACS/WFC 0.12 2004-06-05
F336W icc501021 WFC3/UVIS 1.43 2014-02-20
F438W icc501041 WFC3/UVIS 0.81 2014-02-20
F814W icc501050 WFC3/UVIS 0.70 2014-02-20
F814W jdxk38010 ACS/WFC 2.15 2019-05-28
F275W idxr58040 WFC3/UVIS 2.3 2020-08-14
F555W idxr58030 WFC3/UVIS 2.30 2020-08-14
F115W jw03707 NIRCam/IMAGE 0.22 2023-12-27
F115W jw04793 NIRCam/IMAGE 0.86 2024-09-29
F200W jw04793 NIRCam/IMAGE 0.86 2024-09-29
F300M jw03707 NIRCam/IMAGE 0.22 2023-12-27
F335M jw03707 NIRCam/IMAGE 0.86 2023-12-27
F335M jw04793 NIRCam/IMAGE 1.63 2024-09-29
F360M jw04793 NIRCam/IMAGE 1.63 2024-09-29
F444W jw04793 NIRCam/IMAGE 1.63 2024-09-29
F277W jw04793 NIRCam/IMAGE 0.86 2024-09-29

Notes: NGC 4631, with Target IDs 00082263 and 00084441, was observed 24 times between 2013-11-08 and 2021-02-13. For NGC 1097 ULX-3, we analyzed 84 Swift/XRT PC observations (Target ID 00045597, 2011 Aug 05–2025 Jun 06) and 2 additional observations (Target ID 00036582, 2007 Aug 02–Dec 16).

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