Table 1
IC 3599 X-ray observation log.
| Instrument | Obs. ID. | Obs. start | Duration (ks) | Counts* | Spectrum |
|
|
|||||
| ROSAT/RASS | rs931231n00 | 1990-12-10 | 0.8 | – | – |
| ROSAT/PSPC | rp700552a00 | 1991-12-15 | 3.3 | 101 ± 11 | 1 |
| ROSAT/PSPC | rp700552a01 | 1992-05-31 | 1.4 | 33 ± 6 | 2 |
| ROSAT/PSPC | rp701098n00 | 1992-06-16 | 1.8 | 36 ± 6 | 2 |
| ROSAT/PSPC | rp701099n00 | 1992-06-17 | 1.9 | 33 ± 6 | 2 |
| ROSAT/PSPC | rp701100n00 | 1992-06-18 | 2.0 | 36 ± 6 | 2 |
| ROSAT/PSPC | rp701097n00 | 1992-06-30 | 5.4 | 116 ± 12 | 3 |
| ROSAT/PSPC | rp701528n00 | 1993-06-17 | 3.4 | 26 ± 5 | 3 |
| ROSAT/HRI | rh702704n00 | 1996-06-30 | 14.7 | 77 ± 11 | 3 |
| ROSAT/HRI | rh702706n00 | 1996-06-30 | 16.9 | 87 ± 12 | 3 |
| Chandra/ACIS-S | acisf029999N003 | 2002-03-07 | 10.6 | 427 ± 21 | 4 |
| Swift/XRT | 00037507001 | 2010-02-25 | 2.1 | 432 ± 23 | 5 |
| Swift/XRT | 00037507003 | 2010-05-17 | 1.2 | 100 ± 11 | 6 |
| Swift/XRT | 00037507004 | 2013-10-30 | 4.8 | 21 ± 6 | 7 |
| Swift/XRT | 00037507005 | 2013-11-06 | 4.9 | 12 ± 4 | 7 |
| Swift/XRT | 00037507006 | 2014-03-26 | 4.7 | 14 ± 4 | 7 |
| Swift/XRT | 00037569001 | 2014-08-08 | 1.6 | <16 | – |
| Swift/XRT | 00037569001 | 2014-11-15 | 4.6 | 18 ± 5 | 7 |
| Swift/XRT | 00037569001 | 2014-11-23 | 0.4 | <38 | – |
Notes.
The total number of counts was determined using the XIMAGE (v. 4.5.1) task detect (correcting for vignetting and point spread function losses). Spectra were grouped according to the scheme that spectra with the same number were grouped together. Numbers in italics mean that we used that given conversion factor to pass from count rates to fluxes even if no spectra analysis was carried out on these data because there were too few counts. Two ROSAT/PSPC observations on 1992-06-30 and 1992-12-08 were not considered because IC 3599 is too far off-axis to be detected.
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