SGR J1550-5418 [SEP] constellation
SGR J1550-5418
SGR J1550-5418 is a soft gamma repeater (SGR), the sixth to be discovered, located in the constellation Norma.
Long known as an X-ray source, it was noticed to have become active on 23 October 2008, and then after a relatively quiescent interval, became much more active on 22 January 2009.
It has been observed by the Swift satellite, and by the Fermi Gamma-ray Space Telescope, launched in 2008, as well as in X-ray
. See Orders of magnitude (magnetic field) for examples of other magnetic field strengths.
The rotation period, ~2.07 s, is the fastest yet observed for a magnetar.
The first observation of "Light echos" from a gamma-ray source, a phenomenon long known for visible stars such as novas, have been observed from SGR J1550-5418.
The location of SGR J1550-5418 (aka AXP 1E 1547.0-5408), is RA(J2000) = 15h50m54.11s, Dec(J2000) = -54°18´23.7´