The superluminous supernova PS1-11ap: Bridging the gap between low and high redshift

M. McCrum; S. J. Smartt; R. Kotak; A. Rest; A. Jerkstrand; C. Inserra; S. A. Rodney; T. W. Chen; D. A. Howell; M. E. Huber; A. Pastorello; J. L. Tonry; F. Bresolin; R. P. Kudritzki; R. Chornock; E. Berger; K. Smith; M. T. Botticella; R. J. Foley; M. Fraser; D. Milisavljevic; M. Nicholl; A. G. Riess; C. W. Stubbs; S. Valenti; W. M. Wood-Vasey; D. Wright; D. R. Young; M. Drout; I. Czekala; W. S. Burgett; K. C. Chambers; P. Draper; H. Flewelling; K. W. Hodapp; N. Kaiser; E. A. Magnier; N. Metcalfe; P. A. Price; W. Sweeney; R. J. Wainscoat

doi:10.1093/mnras/stt1923

The superluminous supernova PS1-11ap: Bridging the gap between low and high redshift

M. McCrum, S. J. Smartt, R. Kotak, A. Rest, A. Jerkstrand, C. Inserra, S. A. Rodney, T. W. Chen, D. A. Howell, M. E. Huber, A. Pastorello, J. L. Tonry, F. Bresolin, R. P. Kudritzki, R. Chornock, E. Berger, K. Smith, M. T. Botticella, R. J. Foley, M. FraserD. Milisavljevic, M. Nicholl, A. G. Riess, C. W. Stubbs, S. Valenti, W. M. Wood-Vasey, D. Wright, D. R. Young, M. Drout, I. Czekala, W. S. Burgett, K. C. Chambers, P. Draper, H. Flewelling, K. W. Hodapp, N. Kaiser, E. A. Magnier, N. Metcalfe, P. A. Price, W. Sweeney, R. J. Wainscoat

Astronomy & Astrophysics

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Abstract

We present optical photometric and spectroscopic coverage of the superluminous supernova (SLSN) PS1-11ap, discovered with the Pan-STARRS1 Medium Deep Survey at z = 0.524. This intrinsically blue transient rose slowly to reach a peak magnitude ofM_u =-21.4mag and bolometric luminosity of 8 × 10⁴³ erg s^-1 before settling on to a relatively shallow gradient of decline. The observed decline is significantly slower than those of the SLSNe-Ic which have been the focus of much recent attention. Spectroscopic similarities with the lower redshift SN2007bi and a decline rate similar to ₅₆Co decay time-scale initially indicated that this transient could be a candidate for a pair instability supernova (PISN) explosion. Overall the transient appears quite similar to SN2007bi and the lower redshift object PTF12dam. The extensive data set, from 30 d before peak to 230 d after, allows a detailed and quantitative comparison with published models of PISN explosions.We find that the PS1-11ap data do not match these model explosion parameters well, supporting the recent claim that these SNe are not pair instability explosions.We show that PS1-11ap has many features in common with the faster declining SLSNe-Ic, and the light-curve evolution can also be quantitatively explained by the magnetar spin-down model. At a redshift of z = 0.524, the observer-frame optical coverage provides comprehensive rest-frame UV data and allows us to compare it with the SLSNe recently found at high redshifts between z = 2 and 4. While these high-z explosions are still plausible PISN candidates, they match the photometric evolution of PS1-11ap and hence could be counterparts to this lower redshift transient.

Original language	English (US)
Pages (from-to)	656-674
Number of pages	19
Journal	Monthly Notices of the Royal Astronomical Society
Volume	437
Issue number	1
DOIs	https://doi.org/10.1093/mnras/stt1923
State	Published - Dec 2013

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/stt1923

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McCrum, M., Smartt, S. J., Kotak, R., Rest, A., Jerkstrand, A., Inserra, C., Rodney, S. A., Chen, T. W., Howell, D. A., Huber, M. E., Pastorello, A., Tonry, J. L., Bresolin, F., Kudritzki, R. P., Chornock, R., Berger, E., Smith, K., Botticella, M. T., Foley, R. J., ... Wainscoat, R. J. (2013). The superluminous supernova PS1-11ap: Bridging the gap between low and high redshift. Monthly Notices of the Royal Astronomical Society, 437(1), 656-674. https://doi.org/10.1093/mnras/stt1923

@article{b4ceb4a3c9bb490abe7d8a645b8235e3,

title = "The superluminous supernova PS1-11ap: Bridging the gap between low and high redshift",

abstract = "We present optical photometric and spectroscopic coverage of the superluminous supernova (SLSN) PS1-11ap, discovered with the Pan-STARRS1 Medium Deep Survey at z = 0.524. This intrinsically blue transient rose slowly to reach a peak magnitude ofMu =-21.4mag and bolometric luminosity of 8 × 1043 erg s-1 before settling on to a relatively shallow gradient of decline. The observed decline is significantly slower than those of the SLSNe-Ic which have been the focus of much recent attention. Spectroscopic similarities with the lower redshift SN2007bi and a decline rate similar to 56Co decay time-scale initially indicated that this transient could be a candidate for a pair instability supernova (PISN) explosion. Overall the transient appears quite similar to SN2007bi and the lower redshift object PTF12dam. The extensive data set, from 30 d before peak to 230 d after, allows a detailed and quantitative comparison with published models of PISN explosions.We find that the PS1-11ap data do not match these model explosion parameters well, supporting the recent claim that these SNe are not pair instability explosions.We show that PS1-11ap has many features in common with the faster declining SLSNe-Ic, and the light-curve evolution can also be quantitatively explained by the magnetar spin-down model. At a redshift of z = 0.524, the observer-frame optical coverage provides comprehensive rest-frame UV data and allows us to compare it with the SLSNe recently found at high redshifts between z = 2 and 4. While these high-z explosions are still plausible PISN candidates, they match the photometric evolution of PS1-11ap and hence could be counterparts to this lower redshift transient.",

author = "M. McCrum and Smartt, {S. J.} and R. Kotak and A. Rest and A. Jerkstrand and C. Inserra and Rodney, {S. A.} and Chen, {T. W.} and Howell, {D. A.} and Huber, {M. E.} and A. Pastorello and Tonry, {J. L.} and F. Bresolin and Kudritzki, {R. P.} and R. Chornock and E. Berger and K. Smith and Botticella, {M. T.} and Foley, {R. J.} and M. Fraser and D. Milisavljevic and M. Nicholl and Riess, {A. G.} and Stubbs, {C. W.} and S. Valenti and Wood-Vasey, {W. M.} and D. Wright and Young, {D. R.} and M. Drout and I. Czekala and Burgett, {W. S.} and Chambers, {K. C.} and P. Draper and H. Flewelling and Hodapp, {K. W.} and N. Kaiser and Magnier, {E. A.} and N. Metcalfe and Price, {P. A.} and W. Sweeney and Wainscoat, {R. J.}",

year = "2013",

month = dec,

doi = "10.1093/mnras/stt1923",

language = "English (US)",

volume = "437",

pages = "656--674",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "1",

}

McCrum, M, Smartt, SJ, Kotak, R, Rest, A, Jerkstrand, A, Inserra, C, Rodney, SA, Chen, TW, Howell, DA, Huber, ME, Pastorello, A, Tonry, JL, Bresolin, F, Kudritzki, RP, Chornock, R, Berger, E, Smith, K, Botticella, MT, Foley, RJ, Fraser, M, Milisavljevic, D, Nicholl, M, Riess, AG, Stubbs, CW, Valenti, S, Wood-Vasey, WM, Wright, D, Young, DR, Drout, M, Czekala, I, Burgett, WS, Chambers, KC, Draper, P, Flewelling, H, Hodapp, KW, Kaiser, N, Magnier, EA, Metcalfe, N, Price, PA, Sweeney, W & Wainscoat, RJ 2013, 'The superluminous supernova PS1-11ap: Bridging the gap between low and high redshift', Monthly Notices of the Royal Astronomical Society, vol. 437, no. 1, pp. 656-674. https://doi.org/10.1093/mnras/stt1923

TY - JOUR

T1 - The superluminous supernova PS1-11ap

T2 - Bridging the gap between low and high redshift

AU - McCrum, M.

AU - Smartt, S. J.

AU - Kotak, R.

AU - Rest, A.

AU - Jerkstrand, A.

AU - Inserra, C.

AU - Rodney, S. A.

AU - Chen, T. W.

AU - Howell, D. A.

AU - Huber, M. E.

AU - Pastorello, A.

AU - Tonry, J. L.

AU - Bresolin, F.

AU - Kudritzki, R. P.

AU - Chornock, R.

AU - Berger, E.

AU - Smith, K.

AU - Botticella, M. T.

AU - Foley, R. J.

AU - Fraser, M.

AU - Milisavljevic, D.

AU - Nicholl, M.

AU - Riess, A. G.

AU - Stubbs, C. W.

AU - Valenti, S.

AU - Wood-Vasey, W. M.

AU - Wright, D.

AU - Young, D. R.

AU - Drout, M.

AU - Czekala, I.

AU - Burgett, W. S.

AU - Chambers, K. C.

AU - Draper, P.

AU - Flewelling, H.

AU - Hodapp, K. W.

AU - Kaiser, N.

AU - Magnier, E. A.

AU - Metcalfe, N.

AU - Price, P. A.

AU - Sweeney, W.

AU - Wainscoat, R. J.

PY - 2013/12

Y1 - 2013/12

N2 - We present optical photometric and spectroscopic coverage of the superluminous supernova (SLSN) PS1-11ap, discovered with the Pan-STARRS1 Medium Deep Survey at z = 0.524. This intrinsically blue transient rose slowly to reach a peak magnitude ofMu =-21.4mag and bolometric luminosity of 8 × 1043 erg s-1 before settling on to a relatively shallow gradient of decline. The observed decline is significantly slower than those of the SLSNe-Ic which have been the focus of much recent attention. Spectroscopic similarities with the lower redshift SN2007bi and a decline rate similar to 56Co decay time-scale initially indicated that this transient could be a candidate for a pair instability supernova (PISN) explosion. Overall the transient appears quite similar to SN2007bi and the lower redshift object PTF12dam. The extensive data set, from 30 d before peak to 230 d after, allows a detailed and quantitative comparison with published models of PISN explosions.We find that the PS1-11ap data do not match these model explosion parameters well, supporting the recent claim that these SNe are not pair instability explosions.We show that PS1-11ap has many features in common with the faster declining SLSNe-Ic, and the light-curve evolution can also be quantitatively explained by the magnetar spin-down model. At a redshift of z = 0.524, the observer-frame optical coverage provides comprehensive rest-frame UV data and allows us to compare it with the SLSNe recently found at high redshifts between z = 2 and 4. While these high-z explosions are still plausible PISN candidates, they match the photometric evolution of PS1-11ap and hence could be counterparts to this lower redshift transient.

AB - We present optical photometric and spectroscopic coverage of the superluminous supernova (SLSN) PS1-11ap, discovered with the Pan-STARRS1 Medium Deep Survey at z = 0.524. This intrinsically blue transient rose slowly to reach a peak magnitude ofMu =-21.4mag and bolometric luminosity of 8 × 1043 erg s-1 before settling on to a relatively shallow gradient of decline. The observed decline is significantly slower than those of the SLSNe-Ic which have been the focus of much recent attention. Spectroscopic similarities with the lower redshift SN2007bi and a decline rate similar to 56Co decay time-scale initially indicated that this transient could be a candidate for a pair instability supernova (PISN) explosion. Overall the transient appears quite similar to SN2007bi and the lower redshift object PTF12dam. The extensive data set, from 30 d before peak to 230 d after, allows a detailed and quantitative comparison with published models of PISN explosions.We find that the PS1-11ap data do not match these model explosion parameters well, supporting the recent claim that these SNe are not pair instability explosions.We show that PS1-11ap has many features in common with the faster declining SLSNe-Ic, and the light-curve evolution can also be quantitatively explained by the magnetar spin-down model. At a redshift of z = 0.524, the observer-frame optical coverage provides comprehensive rest-frame UV data and allows us to compare it with the SLSNe recently found at high redshifts between z = 2 and 4. While these high-z explosions are still plausible PISN candidates, they match the photometric evolution of PS1-11ap and hence could be counterparts to this lower redshift transient.

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U2 - 10.1093/mnras/stt1923

DO - 10.1093/mnras/stt1923

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JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

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The superluminous supernova PS1-11ap: Bridging the gap between low and high redshift

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