About every 6 months, the SPI instrument goes through a so-called ``annealing'' phase. During these phases, the detectors are heated up to about 100C for a few days so that their crystal structure can re-arrange and correct itself for most of the accumulated radiation damages. During these phases, listed in Table , SPI does not produce any scientific data. At the end of an annealing phase, the detectors are cooled down again and they are switched on before the temperature reached the nominal value. During this period, the standard energy correction is not so good and special care has to be taken for accurate spectral analysis. These periods with unstable temperature are included in the ranges of revolution provided in Table . Data from revolutions outside of these ranges should be fine in this respect.
UT | IJD | Revolutions included | |
start - stop | start - stop | first - last | |
1 | 2003-02-06 09:00h - 2003-02-18 00:00h | 1132 - 1144 | 39 - 42 |
2 | 2003-07-15 12:00h - 2003-07-29 18:00h | 1291 - 1306 | 92 - 96 |
3 | 2003-11-11 12:00h - 2003-11-26 20:00h | 1411 - 1426 | 132 - 136 |
4 | 2004-06-17 09:00h - 2004-07-02 18:00h | 1629 - 1645 | 205 - 209 |
5 | 2005-01-19 09:00h - 2005-02-05 06:00h | 1845 - 1862 | 277 - 282 |
6 | 2005-06-14 00:00h - 2005-06-30 00:00h | 1991 - 2008 | 326 - 330 |
7 | 2006-01-09 00:00h - 2006-01-26 00:00h | 2200 - 2217 | 395 - 400 |
8 | 2006-06-08 00:00h - 2006-06-27 00:00h | 2350 - 2369 | 446 - 452 |
9 | 2006-12-04 10:00h - 2006-12-22 15:00h | 2529 - 2547 | 506 - 511 |
10 | 2007-05-29 12:00h - 2007-06-17 17:00h | 2705 - 2724 | 565 - 571 |
11 | 2008-01-12 04:00h - 2008-01-31 07:00h | 2933 - 2952 | 641 - 647 |
12 | 2008-08-17 04:00h - 2008-09-05 19:00h | 3151 - 3171 | 714 - 720 |
13 | 2009-04-20 08:00h - 2009-05-11 23:00h | 3397 - 3418 | 796 - 802 |
14 | 2009-10-19 18:00h - 2009-11-09 09:00h | 3579 - 3600 | 857 - 863 |
15 | 2010-03-30 09:00h - 2010-04-17 01:00h | 3741 - 3759 | 911 - 916 |
16 | 2010-10-10 11:00h - 2010-10-31 01:00h | 3935 - 3056 | 974 - 982 |
17 | 2011-04-25 23:00h - 2011-05-16 21:00h | 4132 - 4153 | 1041 - 1048 |
18 | 2011-11-21 08:00h - 2011-12-12 07:00h | 4342 - 4363 | 1111 - 1119 |
19 | 2012-06-05 17:00h - 2012-06-26 20:00h | 4539 - 4560 | 1177 - 1184 |
20 | 2013-01-04 01:00h - 2013-01-22 09:00h | 4752 - 4770 | 1249 - 1254 |
21 | 2013-08-01 10:00h - 2013-08-19 18:00h | 4961 - 4979 | 1319 - 1324 |
22 | 2014-01-06 23:00h - 2014-01-25 08:00h | 5119 - 5138 | 1372 - 1377 |
23 | 2014-08-28 07:00h - 2014-09-12 15:00h | 5353 - 5368 | 1450 - 1454 |
24 | 2015-02-15 13:00h - 2015-02-28 09:00h | 5524 - 5537 | 1508 - 1512 |
25 | 2015-09-08 09:00h - 2015-09-23 19:00h | 5729 - 5745 | 1585 - 1590 |
26 | 2016-03-04 11:00h - 2016-03-17 06:00h | 5907 - 5920 | 1652 - 1656 |
27 | 2016-07-23 11:00h - 2016-08-07 21:00h | 6048 - 6064 | 1705 - 1710 |
28 | 2017-01-14 23:00h - 2017-01-30 09:00h | 6223 - 6239 | 1771 - 1776 |
29 | 2017-07-25 09:00h - 2017-08-09 19:00h | 6415 - 6431 | 1843 - 1848 |
30 | 2018-01-27 14:00h - 2018-02-11 23:00h | 6601 - 6617 | 1913 - 1918 |
31 | 2018-07-22 00:00h - 2018-08-06 12:00h | 6776 - 6792 | 1979 - 1984 |