Pan-STARRS and PESSTO search for an optical counterpart to the LIGO gravitational-wave source GW150914

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题名:	Pan-STARRS and PESSTO search for an optical counterpart to the LIGO gravitational-wave source GW150914
作者:	陳婷琬;Smartt, S. J.;Chambers, K. C.;Smith, K. W.;Huber, M. E.;Young, D. R.;Cappellaro, E.;Wright, D. E.;Coughlin, M.;Schultz, A. S. B.;Denneau, L.;Flewelling, H.;Heinze, A.;Magnier, E. A.;Primak, N.;Rest, A.;Sherstyuk, A.;Stalder, B.;Stubbs, C. W.;Tonry, J.;Waters, C.;Willman, M.;Anderson, J. P.;Baltay, C.;Botticella, M. T.;Campbell, H.;Dennefeld, M.;Chen, T.-W.;Della Valle, M.;Elias-Rosa, N.;Fraser, M.;Inserra, C.;Kankare, E.;Kotak, R.;Kupfer, T.;Harmanen, J.;Galbany, L.;Gal-Yam, A.;Le Guillou, L.;Lyman, J. D.;Maguire, K.;Mitra, A.;Nicholl, M.;Olivares E, F.;Rabinowitz, D.;Razza, A.;Sollerman, J.;Smith, M.;Terreran, G.;Valenti, S.;Gibson, B.;Goggia, T.
贡献者:	理學院天文研究所
关键词:	Astronomy;Astrophysics;Computational efficiency;Constraining;Galaxies;gamma-ray burst: general;Gravitational waves;Gravity;Luminosity;Physics;Probability;Spectroscopy;Spectrum analysis;stars: black holes;stars: neutron;supernovae: general
日期:	2016-11-11
上传时间:	2026-04-21 14:58:41 (UTC+8)
出版者:	Oxford University Press;London: Oxford University Press (OUP)
摘要:	摘要： We searched for an optical counterpart to the first gravitational-wave source discovered by LIGO (GW150914), using a combination of the Pan-STARRS1 wide-field telescope and the Public ESO Spectroscopic Survey of Transient Objects (PESSTO) spectroscopic follow-up programme. As the final LIGO sky maps changed during analysis, the total probability of the source being spatially coincident with our fields was finally only 4.2 per cent. Therefore, we discuss our results primarily as a demonstration of the survey capability of Pan-STARRS and spectroscopic capability of PESSTO. We mapped out 442 deg2 of the northern sky region of the initial map. We discovered 56 astrophysical transients over a period of 41 d from the discovery of the source. Of these, 19 were spectroscopically classified and a further 13 have host galaxy redshifts. All transients appear to be fairly normal supernovae (SNe) and AGN variability and none is obviously linked with GW150914. We illustrate the sensitivity of our survey by defining parametrized light curves with time-scales of 4, 20 and 40 d and use the sensitivity of the Pan-STARRS1 images to set limits on the luminosities of possible sources. The Pan-STARRS1 images reach limiting magnitudes of i P1 = 19.2, 20.0 and 20.8, respectively, for the three time-scales. For long time-scale parametrized light curves (with full width half-maximum ≃40 d), we set upper limits of $M_i \le -17.2^{-0.9}_{+1.4}$ if the distance to GW150914 is D L = 400 ± 200 Mpc. The number of Type Ia SN we find in the survey is similar to that expected from the cosmic SN rate, indicating a reasonably complete efficiency in recovering SN like transients out to D L = 400 ± 200 Mpc. 出版者： London: Oxford University Press (OUP) 出版日期： 2016-11-11 出處： Monthly Notices of the Royal Astronomical Society, 2016-11, Vol.462 (4), p.4094-4116 資源來源： Alma/SFX Local Collection 版權： 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society 2016 版權： Copyright Oxford University Press, UK Nov 11, 2016 版權： licence_http://creativecommons.org/publicdomain/zero 識別號： ISSN: 0035-8711 識別號： ISSN: 1365-2966 識別號： ISSN: 1365-8711 識別號： EISSN: 1365-2966 識別號： DOI: 10.1093/mnras/stw1893
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