SUPPLEMENT: “LOCALIZATION AND BROADBAND FOLLOW-UP OF THE GRAVITATIONAL-WAVE TRANSIENT GW150914” (2016, ApJL, 826, L13)

Abstract

This Supplement provides supporting material for Abbott et al. (2016a). We briefly summarize past electromagnetic (EM) follow-up efforts as well as the organization and policy of the current EM follow-up program. We compare the four probability sky maps produced for the gravitational-wave transient GW150914, and provide additional details of the EM follow-up observations that were performed in the different bands.

Localization and Broadband Follow-Up of the Gravitational-Wave Transient Gw150914

“…Quantitative comparisons of the four sky maps can be found in Section 2 of the Supplement (Abbott et al 2016b). The main feature in all of the maps is an annulus with polar angle θ HL determined by the arrival time difference Δt HL between the two detectors.…”

“…Some optical candidate counterparts were followed up spectroscopically and in the radio band as summarized in Table 2. The overall EM followup of GW150914 consisting of broadband tiled observations and observations to characterize candidate counterparts are described in detail in Sections 3 through 5 of the Supplement (Abbott et al 2016b).…”

“…See the Supplement (Abbott et al 2016b) for a full list of acknowledgements. This is LIGO document LIGO-P1500227-v12.…”

“…381 Seventy-four groups with access to ground-and space-based facilities joined, of which 63 were operational during Advanced LIGOʼs first observing run (O1). Details of the 2009 to 2010 EM follow campaign and changes for O1 are given in Section 1 of the Supplement (Abbott et al 2016b).…”

Thermal Evolution of Neo-neutron Stars. I. Envelopes, Eddington Luminosity Phase, and Implications for GW170817

“…The merger of binary neutron stars and the subsequent production of a beamed, relativistic outflow is believed to trigger short gamma-ray bursts (e.g. Abbott et al 2017a) and expel metallic, radioactive debris referred to as a kilonova (e.g. Kasen et al 2017).…”