The figure on the left is an HST
observation of GRB970228; on the right, the logo of
the 3rd Interplanetary Network.
GRB and Magnetar
The Master Burst
interplanetary network (IPN3) is a group of spacecraft
equipped with gamma-ray
burst detectors. By timing the arrival of a burst at several spacecraft,
its precise location can be found. The farther apart the detectors, the more
precise the location. The principle is illustrated in the figure below. Each
pair of spacecraft, like S1 and S2, gives an annulus
of possible arrival directions whose center is defined by the vector joining
the two spacecraft, and whose radius theta depends on the difference in the
arrival times divided by the distance between the two spacecraft.
IPN3 began operations in 1990, with the launch of the Ulysses spacecraft, which carried the
GRB experiment. Today, the main spacecraft
contributing their data are WIND,
2001 Mars Odyssey, INTEGRAL, Swift, Fermi, and BepiColombo.
When the duty cycles and effective fields of view of all the missions in the
network are considered, the IPN is a full-time, isotropic all-sky GRB
monitor. The flux and fluence efficiencies of the IPN are plotted here. So far, 32 spacecraft have participated in the
A few selected IPN-related publications.
All refereed IPN-related
publications through 2019.
Last modified: December