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Table 1
Log of the Swift/XRT observations used in this paper (until March 15, 2015).
| Fermi source | ID | Obs date | Exposure |
| (s) | |||
|
|
|||
| 1FHL J0312.8+2013 | 00047145001 | Jul. 01, 2012 | 2186 |
| 00047145002 | Jul. 05, 2012 | 1645 | |
| 00047145003 | Jul. 07, 2012 | 281 | |
| Total obs | – | – | 4112 |
|
|
|||
| 1FHL J0625.9+0002 | 00041322001 | Aug. 23, 2010 | 2516 |
| 00041322002 | Sep. 08, 2010 | 1868 | |
| Total obs | – | – | 4384 |
|
|
|||
| 1FHL J0639.6–1244 | 00083670001 | Feb. 27, 2014 | 711 |
|
|
|||
| 1FHL J0644.2+6036 | 00047166002 | Feb. 09, 2012 | 1494 |
| 00047166003 | Feb. 13, 2012 | 1762 | |
| Total obs | – | – | 3256 |
|
|
|||
| 1FHL J0746.3–0225 | 00047174002 | Feb. 25, 2012 | 2940 |
| 00047174003 | Nov. 05, 2012 | 1408 | |
| Total obs | – | – | 4348 |
|
|
|||
| 1FHL J0928.1–5252 | 00084691001 | Feb. 05, 2015 | 116 |
| 00084691002 | Feb. 09, 2015 | 1597 | |
| 00084691003 | Feb. 15, 2015 | 133 | |
| 00084691004 | Apr. 03, 2015 | 83 | |
| Total obs | – | – | 1929 |
|
|
|||
| 1FHL J1115.0–0701 | 00047198001 | Jan. 24, 2012 | 718 |
| 00047198002 | Mar. 20, 2012 | 699 | |
| 00047198004 | Mar. 29, 2012 | 672 | |
| 00047198006 | Jun. 22, 2012 | 1296 | |
| Total obs | – | – | 3385 |
|
|
|||
| 1FHL J1129.2–7759 | 00084723001 | Feb. 03, 2015 | 276 |
| 00084723002 | Feb. 04, 2015 | 231 | |
| 00084723003 | Feb. 05, 2015 | 448 | |
| 00084723004 | Feb. 07, 2015 | 293 | |
| 00084723005 | Feb. 08, 2015 | 905 | |
| 00084723006 | Feb. 15, 2015 | 662 | |
| 00084723007 | Mar. 06, 2015 | 602 | |
| Total obs | – | – | 3417 |
|
|
|||
| 1FHL J1223.3+7953 | 00047201001 | Feb. 10, 2012 | 4179 |
|
|
|||
| 1FHL J1240.4–7150 | 00041386001 | Feb. 12, 2011 | 3161 |
| 00041386002 | Feb. 14, 2011 | 1605 | |
| Total obs | – | – | 4766 |
|
|
|||
| 1FHL J1315.7–0730 | 00041395001 | Aug. 18, 2010 | 4958 |
| 00041395002 | Aug. 21, 2010 | 1678 | |
| Total obs | – | – | 6636 |
|
|
|||
| 1FHL J1407.1–6133 | 00042321001 | Mar. 10, 2012 | 617 |
|
|
|||
| 1FHL J1410.4+7408 | 00041402001 | Mar. 08, 2011 | 1414 |
| 00041402003 | Mar. 11, 2011 | 2007 | |
| 00047219004 | Mar. 29, 2012 | 1026 | |
| 00047219006 | Apr. 05, 2012 | 1171 | |
| 00084043009 | Jun. 12, 2014 | 1258 | |
| Total obs | – | – | 6876 |
|
|
|||
| 1FHL J1507.0–6223 | 00047226002 | Dec. 18, 2012 | 2009 |
| 00047226003 | Dec. 19, 2012 | 1826 | |
| Total obs | – | – | 3835 |
|
|
|||
| 1FHL J1619.8+7540 | 00084770001 | Jan. 23, 2015 | 756 |
|
|
|||
| 1FHL J1634.7–4705 | 00042964002 | Jan. 16, 2012 | 341 |
| 00410087000 | Jan. 29, 2012 | 516 | |
| 00042957001 | Apr. 28, 2012 | 543 | |
| 00080704001 | Mar. 12, 2014 | 788 | |
| 00080705001 | Mar. 12, 2014 | 2059 | |
| Total obs | – | – | 4247 |
|
|
|||
| 1FHL J1758.3–2340 | 00049691001 | Jun. 28, 2014 | 203 |
| 00043785001 | Oct. 05, 2012 | 513 | |
| Total obs | – | – | 716 |
|
|
|||
| 1FHL J1839.1–0557 | 00044397001 | Mar. 15, 2013 | 527 |
|
|
|||
| 1FHL J1839.4–0708 | 00044371001 | Mar. 15, 2013 | 528 |
|
|
|||
| 1FHL J1856.9+0252 | 00036183001 | Nov. 10, 2006 | 720 |
| 00036184001 | Mar. 01, 2007 | 3097 | |
| 00036184002 | Mar. 07, 2007 | 4107 | |
| 00036183002 | Mar. 13, 2007 | 4102 | |
| 00037742001 | Nov. 16, 2008 | 9148 | |
| 00044642002 | Mar. 02, 2013 | 456 | |
| 00032774001 | Mar. 27, 2013 | 782 | |
| 00032782001 | Mar. 28, 2013 | 782 | |
| Total obs | – | – | 23194 |
|
|
|||
| 1FHL J2004.4+3339 | 00041467001 | Sep. 05, 2010 | 448 |
| 00041467002 | Jan. 09, 2011 | 1605 | |
| 00041467004 | Jan. 16, 2011 | 2040 | |
| Total obs | – | – | 4093 |
|
|
|||
| 1FHL J2134.6–2130 | 00041496001 | Sep. 26, 2010 | 439 |
| 00041496002 | Dec. 19, 2010 | 1838 | |
| 00041496003 | Dec. 23, 2010 | 4274 | |
| 00084044001 | Jul. 27, 2014 | 1304 | |
| 00084044002 | Aug. 05, 2014 | 1036 | |
| 00084044003 | Sep. 12, 2014 | 156 | |
| 00084044004 | Sep. 14, 2014 | 453 | |
| 00084044005 | Oct. 13, 2014 | 739 | |
| 00084044006 | Oct. 15, 2014 | 273 | |
| 00084044008 | Dec. 18, 2014 | 1203 | |
| Total obs | – | – | 11715 |
|
|
|||
| 1FHL J2257.9–3644 | 00041507001 | Aug. 02, 2010 | 1734 |
| 00041507002 | Aug. 12, 2010 | 1800 | |
| Total obs | – | – | 3534 |
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