Table 1.
X-ray observations of Mrk 1018 with major X-ray facilities.
| Date | Instrument | Abbr. | Obs.ID | Obs. | GTI | Counts | Comments | Opt./UV obs. |
|---|---|---|---|---|---|---|---|---|
| yyyy-mm-dd | mode | (ks) | Filter bands | |||||
| bright type 1 phase | ||||||||
| 2005-01-15 | XMM-Newton | XMM1 | 0201090201 | FF,T | 1.4 | 7177 | high variable bkg. | U,W1,M2,W2 |
| 2005-08-05 | Swift | Sw1 | 00035166001 | PC | 5.2 | 1778 | Piled-up | V,B,U,W1,M2,W2 |
| 2008-06-11 | Swift | Sw2 | 00035776001 | PC | 4.8 | 1147 | Piled-up | V,B,U,W1,M2,W2 |
| 2008-08-07 | XMM-Newton | XMM2 | 0554920301 | SW,M | 9.2 | 61 263 | – | U,W1,M2 |
| 2009-07-03 | Suzaku | SUZ | 704044010 | – | 43.9 | 86 536 | – | – |
| 2010-11-27 | Chandra | C1 | 12868 | ACIS-S | 22.7 | 741 | Piled-up | – |
| transition phase | ||||||||
| 2013-03-01 | Swift | Sw3 | 00049654001 | PC | 0.7 | 57 | low cts. | V,B,U,W1,M2,W2 |
| 2013-06-07 | Swift | Sw4 | 00049654002 | PC | 1.3 | 291 | low cts. | V,B,U,W1,M2,W2 |
| 2014-06-09 | Swift | Sw5 | 00049654004 | PC | 2.1 | 86 | low cts. | V,B,U,W1,M2,W2 |
| faint type 1.9 phase | ||||||||
| 2016-02-25 | Chandra | C2 | 18789 | ACIS-S | 27.2 | 4171 | – | – |
| 2017-02-17 | Chandra | C3 | 19560 | ACIS-S | 48.6 | 12 778 | – | – |
| 2018-06-12 | Chandra | C4 | 20366 | ACIS-S | 18.2 | 3252 | – | – |
| 2018-07-23 | XMM-Newton | XMM3 | 0821240201 | FF,M | 52.2 | 38 139 | – | M2 |
| 2018-09-09 | Chandra | C5 | 20369 | ACIS-S | 19.1 | 5103 | – | – |
| 2019-01-04 | XMM-Newton | XMM4 | 0821240301 | FF,M | 43.4 | 15 925 | – | M2 |
| 2019-02-06 | Chandra | C6 | 21432 | ACIS-S | 22.7 | 3883 | – | – |
| 2019-02-07 | Chandra | C7 | 22082 | ACIS-S | 18.2 | 3360 | – | – |
| 2019-10-09 | Chandra | C8 | 21433 | ACIS-S | 40.9 | 3773 | – | – |
| 2021-02-04 | XMM-Newton | XMM5 | 0864350101 | FF,M | 41.0 | 14 995 | after outburst | M2 |
Notes. Observing mode: FF – Full frame mode (XMM-Newton EPIC-pn). SW – Small window mode (XMM-Newton EPIC-pn). T – Thin filter. M – Medium filter. The term GTI denotes the good time interval for XMM-Newton pn pattern 0 or for Suzaku (all XIS detectors). Specified counts are from XMM-Newton, 0.3–10.0 keV range (pn pattern 0 only); Chandra, 0.5–10.0 keV range; Suzaku, XIS0 + XIS1 + XIS3 in 0.4–10.0 keV range. The XMM-Newton and Suzaku observations yielded the highest count spectra when adding up all instruments (e.g., EPIC-pn pattern 0 + pn pattern 1–4 + MOS1 + MOS2). Only these observations were used for our detailed spectral fitting in Sect. 3.1.
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