+-----------------------+----------------+----------------+----------------+----------------+---------------+---------------+---------------+-------+------------+ | Name | Ks | H | J | I | R | V | B | U | References | +-----------------------+----------------+----------------+----------------+----------------+---------------+---------------+---------------+-------+------------+ | CXOU J010043.1-721134 | | | | >25.9 | | 24.2 -- >26.2 | >25.6 | >24.2 | 1, 2 | | 4U 0142+61 | 19.7 -- 20.8 | 20.5 -- 20.9 | 22.0 -- 22.2 | 23.4 -- 24.0 | 24.9 -- 25.6 | 25.3 -- 26.1 | 27.2 -- 28.1 | >25.8 | 3-6 | | SGR 0418+5729 | >19.6 | | >27.4 | >25.1 | >24 | >28.6 | | | 7-10 | | SGR 0501+4516 | 18.6 -- 19.7 | | | 23.3 -- 24.4 | >23.0 | | >26.9 | >24.7 | 11-14 | | SGR 0526-66 | | | | >26.7 | | >26.6 | >24.7 | >25.0 | 15 | | 1E 1048.1-5937 | 19.4 -- 21.5 | 20.8 -- >23.3 | 21.7 -- >25.0 | 24.9 -- 26.2 | >26.0 | >25.5 | >27.6 | >25.7 | 16-21 | | 1E 1547.0-5408 | 18.5 -- >21.7 | | | | | >20.4 | >20.7 | >20.3 | 22-24 | | PSR J1622-4950 | >20.7 | | | | | | | | 25 | | SGR 1627-41 | >20.0 | >19.5 | >21.5 | | | | | | 26 | | CXOU J164710.2-455216 | >21 | | | | | | | | 27 | | 1RXS J170849.0-400910 | >19.0* | >20.3* | >21.9* | >25.1 | >26.5 | | | | 28, 29 | | CXOU J171405.7-381031 | | | | | | | | | | | SGR J1745-2900 | | | | | | | | | | | SGR 1806-20 | 19.3 -- 21.9 | >19.5 | >21.2 | | >21.5 | | | | 30-32 | | XTE J1810-197 | 20.8 -- 21.9 | 21.5 -- 22.6 | 22.9 -- 23.9 | >24.3 | >21.5 | >22.5 | | | 30, 33-36 | | Swift J1818.0-1607 | | | | | | | | | | | Swift J1822.3-1606 | >17.3 | >18.3 | >19.3 | >22.2 | | | | | 37 | | SGR 1833-0832 | >22.4 | | | >24.9 | | >21.4 | >21.3 | >22.3 | 38, 39 | | Swift J1834.9-0846 | >19.5 | | | >21.6 | | | | | 40, 41 | | 1E 1841-045 | 19.6 -- 20.5 | 20.8 -- >21.5 | >22.1 | | | | | | 36, 42 | | 3XMM J185246.6+003317 | | | | | | | | | | | SGR 1900+14 | 19.2 -- 19.7 | | | >21 | | | | | 36, 43 | | SGR 1935+2154 | >15.4 | >16.0 | >16.6 | >24 * | >21.5 | >19.8 | >22.1 | >20.6 | 44-47 | | 1E 2259+586 | 20.4 -- 21.7 | | >23.8 | >25.6 | >26.4 | | | | 48, 49 | | | | | | | | | | | | | SGR 0755-2933 # | | | | | | | | | | | SGR 1801-23 # | | | | | | | | | | | SGR 1808-20 # | | | | | | | | | | | AX J1818.8-1559 # | >17 | | | | | | | | 50 | | AX J1845.0-0258 # | | >21 | | | | | | | 51 | | SGR 2013+34 # | >18.3 | >18.5 | >19.3 | >20.6 | >19 | >20.2 | >21.8 | >21.2 | 52-55 | | | | | | | | | | | | | PSR J1846-0258 ## | | | | | | | | | | +-----------------------+----------------+----------------+----------------+----------------+---------------+---------------+---------------+-------+------------+ Notes: # This candidate is unconfirmed. ## This source is often classified as a young, rotation-powered pulsar, but it was seen to undergo a magnetar-like outburst in 2006 (see Gavriil et al. 2008, Science, 319, 1802). * Because no optical/near-infrared counterpart of the magnetar has been identified, the given limit is the magnitude of the brightest observed source near the position of the magnetar. 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