Hands-on

Hands-on#

  1. Calculate the sky overlap between GW170817 and the Fermi-GBM map of GRB170817A

# here your code

  1. Calculate the joint FAR for the two candidates we saw in the skymap_far notebook, but assuming that the Swift-BAT candidate is localized with high precision (uncertainty negligible) at a position which is the peak of the NITRATES map

# your code

  1. Search on the GCN archive a random EM transient (GRB, Einstein Probe X-ray transient, SN) occurred until Nov 18 (end of O4) and check if there is any neighbor event in a given time window you think is appropriate. If there is any, compute jont FAR. If the external event has no info on sky position, compute only temporal FAR.

If you don’t find any neighbor, just take two random GW and EXT events and pretend they are separated by two seconds and apply the above steps.

# your code

  1. In the notebook on offline searches, take the highest ranked candidate, plot the skymap and the position of the Swift GRB, compute the credible level at the GRB position and try to re-compute the joint spatio-temporal FAR assuming that the GRB is at the peak of the GW map

# your code