English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present the discovery of the X-ray and optical afterglows of theshort-duration GRB 150101B, pinpointing the event to an early-type host galaxyat z=0.1343 +/- 0.0030. This makes GRB 150101B the most nearby short GRB withan early-type host galaxy discovered to date. Fitting the spectral energydistribution of the host galaxy results in an inferred stellar mass of ~7x10^10M_sol, stellar population age of ~2-2.5 Gyr, and star formation rate of <0.4M_sol yr^-1. The host of GRB 150101B is one of the largest and most luminousshort GRB host galaxies, with a B-band luminosity of ~4.3L* and half-lightradius of ~8 kpc. GRB 150101B is located at a projected distance of 7.35 +/-0.07 kpc from its host center, and lies on a faint region of its hostrest-frame optical light. Its location, combined with the lack of associatedsupernova, is consistent with a NS-NS/NS-BH merger progenitor. From modelingthe evolution of the broad-band afterglow, we calculate isotropic-equivalentgamma-ray and kinetic energies of ~1.3x10^49 erg and ~(6-14)x10^51 erg,respectively, a circumburst density of ~(0.8-4)x10^-5 cm^-3, and a jet openingangle of >9 deg. Using observations extending to ~30 days, we place upperlimits of <(2-4)x10^41 erg s^-1 on associated kilonova emission. We comparesearches following previous short GRBs to existing kilonova models, anddemonstrate the difficulty of performing effective kilonova searches fromcosmological short GRBs using current ground-based facilities. We show that atthe Advanced LIGO/VIRGO horizon distance of 200 Mpc, searches reaching depthsof ~23-24 AB mag are necessary to probe a meaningful range of kilonova models.

The Afterglow and Early-Type Host Galaxy of the Short GRB 150101B at z=0.1343