Open Access
Table 1.
XMM-Newton observations of Holmberg II X-1.
| Obs. ID | Date | ttot [s] | tnet, EPIC-PN [s] | CREPIC-PN [c s−1] |
|---|---|---|---|---|
| 0112520601 | 2002-04-10 | 12 640 | 4637 | 2.62 ± 0.02 |
| 0112520701 | 2002-04-16 | 13 869 | 3503 | 2.26 ± 0.02 |
| 0112520901 | 2002-09-18 | 6888 | 4235 | 0.679 ± 0.01 |
| 0200470101 | 2004-04-15 | 104 677 | 37 539 | 2.62 ± 0.008 |
| 0561580401 | 2010-03-26 | 53 852 | 21 712 | 1.06 ± 0.007 |
| 0724810101 | 2013-09-09 | 15 268 | 4650 | 1.78 ± 0.02 |
| 0724810301 | 2013-09-17 | 15 000 | 5988 | 1.73 ± 0.02 |
| 0864550201 | 2021-03-08 | 26 300 | 17 414 | 0.468 ± 0.005 |
| 0864550301 | 2021-03-12 | 25 900 | 19 577 | 0.481 ± 0.005 |
| 0864550401 | 2021-03-15 | 27 000 | 17 600 | 0.956 ± 0.007 |
| 0864550501 | 2021-03-19 | 23 000 | 13 513 | 2.54 ± 0.01 |
| 0864550601 | 2021-03-23 | 26 000 | 17 768 | 2.78 ± 0.01 |
| 0864550701 | 2021-03-27 | 20 500 | 14 054 | 0.690 ± 0.007 |
| 0864550801 | 2021-04-04 | 26 000 | 19 202 | 2.25 ± 0.01 |
| 0864550901 | 2021-04-08 | 26 000 | 17 745 | 0.608 ± 0.006 |
| 0864551101 | 2021-03-31 | 25 300 | 11 917 | 1.40 ± 0.01 |
| 0864551201 | 2021-04-12 | 25 000 | 12 908 | 1.50 ± 0.01 |
Notes. tnet is the exposure time after the removal of periods with high background and CREPIC-PN is the net source count rate.
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