Article open access publication

GRB 171010A / SN 2017htp: a GRB-SN at z=0.33

Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP), ISSN 1365-2966

Volume 490, 4, 2019

DOI:10.1093/mnras/stz2900, Dimensions: pub.1121860111,

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  1. (1) Brera Astronomical Observatory, grid.450217.5
  2. (2) Technical University of Denmark, grid.5170.3, DTU
  3. (3) The Cosmic Dawn Center (DAWN)
  4. (4) University of Copenhagen, grid.5254.6, KU
  5. (5) Instituto de Astrofísica de Andalucía, grid.450285.e
  6. (6) University of Amsterdam, grid.7177.6
  7. (7) French National Centre for Scientific Research, grid.4444.0
  8. (8) Max-Planck Institut für Extraterrestrische Physik, Giessenbachstrsse 1, D-85748 Garching, Germany
  9. (9) Nordic Optical Telescope, La Palma, Canary Islands 3537, Spain
  10. (10) European Southern Observatory, grid.440369.c
  11. (11) Stockholm University, grid.10548.38
  12. (12) University College London, grid.83440.3b
  13. (13) Astronomical Observatory of Rome, grid.463298.2
  14. (14) Agenzia Spaziale Italiana, grid.423784.e
  15. (15) Astronomical Observatory of Capodimonte, grid.466952.a
  16. (16) European Southern Observatory, grid.424907.c
  17. (17) Istanbul University, grid.9601.e
  18. (18) University of Warsaw, grid.12847.38
  19. (19) Clemson University, grid.26090.3d
  20. (20) University of Iceland, grid.14013.37
  21. (21) Cardiff University, grid.5600.3
  22. (22) University of Turku, grid.1374.1
  23. (23) Queen's University Belfast, grid.4777.3
  24. (24) Andrés Bello University, grid.412848.3
  25. (25) INAF - Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Piero Gobetti 93/3, I-40129, Bologna, Italy
  26. (26) Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, EH9 3HJ, UK
  27. (27) University of Birmingham, grid.6572.6
  28. (28) Millennium Institute of Astrophysics, grid.450287.c
  29. (29) University of Atacama, grid.440631.4
  30. (30) INAF - Istituto di Astrofisica Spaziale e Fisica Cosmica, via A. Corti 12, I-20133, Milano, Italy
  31. (31) Osservatorio Astronomico di Padova, grid.436939.2
  32. (32) National Astronomical Observatories, grid.450302.0

Description

ABSTRACT The number of supernovae known to be connected with long-duration gamma-ray bursts (GRBs) is increasing and the link between these events is no longer exclusively found at low redshift (z ≲ 0.3) but is well established also at larger distances. We present a new case of such a liaison at z = 0.33 between GRB 171010A and SN 2017htp. It is the second closest GRB with an associated supernova of only three events detected by Fermi-LAT. The supernova is one of the few higher redshift cases where spectroscopic observations were possible and shows spectral similarities with the well-studied SN 1998bw, having produced a similar Ni mass ($M_{\rm Ni}=0.33\pm 0.02 ~\rm {M_{\odot }}$) with slightly lower ejected mass ($M_{\rm ej}=4.1\pm 0.7~\rm {M_{\odot }}$) and kinetic energy ($E_{\rm K} = 8.1\pm 2.5 \times 10^{51} ~\rm {erg}$). The host-galaxy is bigger in size than typical GRB host galaxies, but the analysis of the region hosting the GRB revealed spectral properties typically observed in GRB hosts and showed that the progenitor of this event was located in a very bright H ii region of its face-on host galaxy, at a projected distance of ∼ 10 kpc from its galactic centre. The star-formation rate (SFRGRB ∼ 0.2 M⊙ yr−1) and metallicity (12  + log(O/H) ∼8.15 ± 0.10) of the GRB star-forming region are consistent with those of the host galaxies of previously studied GRB–SN systems.

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Technical University of Denmark

University of Copenhagen

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Green, Accepted