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Search for transient optical counterparts to high-energy IceCube neutrinos with Pan-STARRS1

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Abstract
In order to identify the sources of the observed diffuse high-energy neutrino flux, it is crucial to discover their electromagnetic counterparts. To increase the sensitivity of detecting counterparts of transient or variable sources by telescopes with a limited field of view, IceCube began releasing alerts for single high-energy (E-v > 60 TeV) neutrino detections with sky localisation regions of order 1 degrees radius in 2016. We used Pan-STARRS1 to follow-up five of these alerts during 2016-2017 to search for any optical transients that may be related to the neutrinos. Typically 10-20 faint m(ip1) less than or similar to 22.5 mag) extragalactic transients are found within the Pan-STARRS1 footprints and are generally consistent with being unrelated field supernovae (SNe) and AGN. We looked for unusual properties of the detected transients, such as temporal coincidence of explosion epoch with the IceCube timestamp, or other peculiar light curve and physical properties. We found only one transient that had properties worthy of a specific follow-up. In the Pan-STARRS1 imaging for IceCube-160427A (probability to be of astrophysical origin of similar to 50%), we found a SN PS16cgx, located at 10.0' from the nominal IceCube direction. Spectroscopic observations of PS16cgx showed that it was an H-poor SN at redshift z = 0.2895 +/- 0.0001. The spectra and light curve resemble some high-energy Type Ic SNe, raising the possibility of a jet driven SN with an explosion epoch temporally coincident with the neutrino detection. However, distinguishing Type Ia and Type Ic SNe at this redshift is notoriously difficult. Based on all available data we conclude that the transient is more likely to be a Type Ia with relatively weak Sin absorption and a fairly normal rest-frame r-band light curve. If, as predicted, there is no high-energy neutrino emission from Type Ia SNe, then PS16cgx must be a random coincidence, and unrelated to the IceCube-160427A. We find no other plausible optical transient for any of the five IceCube events observed down to a 5 sigma limiting magnitude of mip1 approximate to 22 mag, between 1 day and 25 days after detection.
Keywords
DIGITAL SKY SURVEY, GAMMA-RAY BURSTS, FOLLOW-UP, SUPERNOVA RATES, IA, SUPERNOVAE, DATA RELEASE, LIGHT-CURVE, PAN-STARRS, SPECTROGRAPH, CALIBRATION, astroparticle physics, neutrinos, supernovae: general

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MLA
Kankare, E., et al. “Search for Transient Optical Counterparts to High-Energy IceCube Neutrinos with Pan-STARRS1.” ASTRONOMY & ASTROPHYSICS, vol. 626, 2019, doi:10.1051/0004-6361/201935171.
APA
Kankare, E., Huber, M., Smartt, S. J., Chambers, K., Smith, K. W., McBrien, O., … Nordin, J. (2019). Search for transient optical counterparts to high-energy IceCube neutrinos with Pan-STARRS1. ASTRONOMY & ASTROPHYSICS, 626. https://doi.org/10.1051/0004-6361/201935171
Chicago author-date
Kankare, E., M. Huber, S. J. Smartt, K. Chambers, K. W. Smith, O. McBrien, T-W Chen, et al. 2019. “Search for Transient Optical Counterparts to High-Energy IceCube Neutrinos with Pan-STARRS1.” ASTRONOMY & ASTROPHYSICS 626. https://doi.org/10.1051/0004-6361/201935171.
Chicago author-date (all authors)
Kankare, E., M. Huber, S. J. Smartt, K. Chambers, K. W. Smith, O. McBrien, T-W Chen, H. Flewelling, T. Lowe, E. Magnier, A. Schultz, C. Waters, R. J. Wainscoat, M. Willman, D. Wright, D. Young, M. G. Aartsen, M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, M. Ahrens, C. Alispach, D. Altmann, K. Andeen, T. Anderson, I Ansseau, G. Anton, C. Arguelles, J. Auffenberg, S. Axani, P. Backes, H. Bagherpour, X. Bai, A. Barbano, S. W. Barwick, V Baum, R. Bay, J. J. Beatty, K-H Becker, J. Becker Tjus, S. BenZvi, D. Berley, E. Bernardini, D. Z. Besson, G. Binder, D. Bindig, E. Blaufuss, S. Blot, C. Bohm, M. Boerner, S. Boeser, O. Botner, E. Bourbeau, J. Bourbeau, F. Bradascio, J. Braun, H-P Bretz, S. Bron, J. Brostean-Kaiser, A. Burgman, R. S. Busse, T. Carver, C. Chen, E. Cheung, D. Chirkin, K. Clark, L. Classen, G. H. Collin, J. M. Conrad, P. Coppin, P. Correa, D. F. Cowen, R. Cross, P. Dave, J. P. A. M. de Andre, C. De Clercq, J. J. DeLaunay, H. Dembinski, K. Deoskar, Sam De Ridder, P. Desiati, K. D. de Vries, G. de Wasseige, M. de With, T. DeYoung, J. C. Diaz-Velez, H. Dujmovic, M. Dunkman, E. Dvorak, B. Eberhardt, T. Ehrhardt, P. Eller, P. A. Evenson, S. Fahey, A. R. Fazely, J. Felde, K. Filimonov, C. Finley, A. Franckowiak, E. Friedman, A. Fritz, T. K. Gaisser, J. Gallagher, E. Ganster, S. Garrappa, L. Gerhardt, K. Ghorbani, T. Glauch, T. Glsenkamp, A. Goldschmidt, J. G. Gonzalez, D. Grant, Z. Griffith, M. Guenduez, C. Haack, A. Hallgren, L. Halve, F. Halzen, K. Hanson, D. Hebecker, D. Heereman, K. Helbing, R. Hellauer, F. Henningsen, S. Hickford, J. Hignight, G. C. Hill, K. D. Hoffman, R. Hoffmann, T. Hoinka, B. Hokanson-Fasig, K. Hoshina, F. Huang, K. Hultqvist, M. Huennefeld, R. Hussain, S. In, N. Iovine, A. Ishihara, E. Jacobi, G. S. Japaridze, M. Jeong, K. Jero, B. J. P. Jones, P. Kalaczynski, W. Kang, A. Kappes, D. Kappesser, T. Karg, M. Karl, A. Karle, U. Katz, M. Kauer, A. Keivani, J. L. Kelley, A. Kheirandish, J. Kim, T. Kintscher, J. Kiryluk, T. Kittler, S. R. Klein, R. Koirala, H. Kolanoski, L. Koepke, C. Kopper, S. Kopper, D. J. Koskinen, M. Kowalski, K. Krings, G. Krueckl, N. Kulacz, S. Kunwar, N. Kurahashi, A. Kyriacou, Mathieu Labare, J. L. Lanfranchi, M. J. Larson, F. Lauber, J. P. Lazar, K. Leonard, M. Leuermann, Q. R. Liu, E. Lohfink, C. J. Lozano Mariscal, L. Lu, F. Lucarelli, J. Lunemann, W. Luszczak, J. Madsen, G. Maggi, K. B. M. Mahn, Y. Makino, K. Mallot, S. Mancina, I. C. Mari, R. Maruyama, K. Mase, R. Maunu, K. Meagher, M. Medici, A. Medina, M. Meier, S. Meighen-Berger, T. Menne, G. Merino, T. Meures, S. Miarecki, J. Micallef, G. Momente, T. Montaruli, R. W. Moore, M. Moulai, R. Nagai, R. Nahnhauer, P. Nakarmi, U. Naumann, G. Neer, H. Niederhausen, S. C. Nowicki, D. R. Nygren, A. Obertacke Pollmann, A. Olivas, A. O’Murchadha, E. O’Sullivan, T. Palczewski, H. Pandya, V Pankova, D., N. Park, P. Peiffer, C. Perez de los Heros, D. Pieloth, E. Pinat, A. Pizzuto, M. Plum, P. B. Price, G. T. Przybylski, C. Raab, A. Raissi, M. Rameez, L. Rauch, K. Rawlins, I. C. Rea, R. Reimann, B. Relethford, G. Renzi, E. Resconi, W. Rhode, M. Richman, S. Robertson, M. Rongen, C. Rott, T. Ruhe, Dirk Ryckbosch, D. Rysewyk, I Safa, S. E. Sanchez Herrera, A. Sandrock, J. Sandroos, M. Santander, S. Sarkar, K. Satalecka, M. Schaufel, P. Schlunder, T. Schmidt, A. Schneider, J. Schneider, L. Schumacher, S. Sclafani, D. Seckel, S. Seunarine, M. Silva, R. Snihur, J. Soedingrekso, D. Soldin, M. Song, G. M. Spiczak, C. Spiering, J. Stachurska, M. Stamatikos, T. Stanev, A. Stasik, R. Stein, J. Stettner, A. Steuer, T. Stezelberger, R. G. Stokstad, A. Stossl, N. L. Strotjohann, T. Stuttard, G. W. Sullivan, M. Sutherland, I Taboada, F. Tenholt, S. Ter-Antonyan, A. Terliuk, S. Tilav, L. Tomankova, C. Tonnis, S. Toscano, D. Tosi, M. Tselengidou, C. F. Tung, A. Turcati, R. Turcotte, C. F. Turley, B. Ty, E. Unger, M. A. Unland Elorrieta, M. Usner, J. Vandenbroucke, Ward Van Driessche, D. van Eijk, N. van Eijndhoven, Sander Vanheule, J. van Santen, Matthias Vraeghe, C. Walck, A. Wallace, M. Wallraff, N. Wandkowsky, T. B. Watson, C. Weaver, M. J. Weiss, J. Weldert, C. Wendt, J. Werthebach, S. Westerhoff, B. J. Whelan, N. Whitehorn, K. Wiebe, C. H. Wiebusch, L. Wille, D. R. Williams, L. Wills, M. Wolf, J. Wood, T. R. Wood, K. Woschnagg, G. Wrede, D. L. Xu, X. W. Xu, Y. Xu, J. P. Yanez, G. Yodh, S. Yoshida, T. Yuan, and J. Nordin. 2019. “Search for Transient Optical Counterparts to High-Energy IceCube Neutrinos with Pan-STARRS1.” ASTRONOMY & ASTROPHYSICS 626. doi:10.1051/0004-6361/201935171.
Vancouver
1.
Kankare E, Huber M, Smartt SJ, Chambers K, Smith KW, McBrien O, et al. Search for transient optical counterparts to high-energy IceCube neutrinos with Pan-STARRS1. ASTRONOMY & ASTROPHYSICS. 2019;626.
IEEE
[1]
E. Kankare et al., “Search for transient optical counterparts to high-energy IceCube neutrinos with Pan-STARRS1,” ASTRONOMY & ASTROPHYSICS, vol. 626, 2019.
@article{8668168,
  abstract     = {In order to identify the sources of the observed diffuse high-energy neutrino flux, it is crucial to discover their electromagnetic counterparts. To increase the sensitivity of detecting counterparts of transient or variable sources by telescopes with a limited field of view, IceCube began releasing alerts for single high-energy (E-v > 60 TeV) neutrino detections with sky localisation regions of order 1 degrees radius in 2016. We used Pan-STARRS1 to follow-up five of these alerts during 2016-2017 to search for any optical transients that may be related to the neutrinos. Typically 10-20 faint m(ip1) less than or similar to 22.5 mag) extragalactic transients are found within the Pan-STARRS1 footprints and are generally consistent with being unrelated field supernovae (SNe) and AGN. We looked for unusual properties of the detected transients, such as temporal coincidence of explosion epoch with the IceCube timestamp, or other peculiar light curve and physical properties. We found only one transient that had properties worthy of a specific follow-up. In the Pan-STARRS1 imaging for IceCube-160427A (probability to be of astrophysical origin of similar to 50%), we found a SN PS16cgx, located at 10.0' from the nominal IceCube direction. Spectroscopic observations of PS16cgx showed that it was an H-poor SN at redshift z = 0.2895 +/- 0.0001. The spectra and light curve resemble some high-energy Type Ic SNe, raising the possibility of a jet driven SN with an explosion epoch temporally coincident with the neutrino detection. However, distinguishing Type Ia and Type Ic SNe at this redshift is notoriously difficult. Based on all available data we conclude that the transient is more likely to be a Type Ia with relatively weak Sin absorption and a fairly normal rest-frame r-band light curve. If, as predicted, there is no high-energy neutrino emission from Type Ia SNe, then PS16cgx must be a random coincidence, and unrelated to the IceCube-160427A. We find no other plausible optical transient for any of the five IceCube events observed down to a 5 sigma limiting magnitude of mip1 approximate to 22 mag, between 1 day and 25 days after detection.},
  articleno    = {A117},
  author       = {Kankare, E. and Huber, M. and Smartt, S. J. and Chambers, K. and Smith, K. W. and McBrien, O. and Chen, T-W and Flewelling, H. and Lowe, T. and Magnier, E. and Schultz, A. and Waters, C. and Wainscoat, R. J. and Willman, M. and Wright, D. and Young, D. and Aartsen, M. G. and Ackermann, M. and Adams, J. and Aguilar, J. A. and Ahlers, M. and Ahrens, M. and Alispach, C. and Altmann, D. and Andeen, K. and Anderson, T. and Ansseau, I and Anton, G. and Arguelles, C. and Auffenberg, J. and Axani, S. and Backes, P. and Bagherpour, H. and Bai, X. and Barbano, A. and Barwick, S. W. and Baum, V and Bay, R. and Beatty, J. J. and Becker, K-H and Tjus, J. Becker and BenZvi, S. and Berley, D. and Bernardini, E. and Besson, D. Z. and Binder, G. and Bindig, D. and Blaufuss, E. and Blot, S. and Bohm, C. and Boerner, M. and Boeser, S. and Botner, O. and Bourbeau, E. and Bourbeau, J. and Bradascio, F. and Braun, J. and Bretz, H-P and Bron, S. and Brostean-Kaiser, J. and Burgman, A. and Busse, R. S. and Carver, T. and Chen, C. and Cheung, E. and Chirkin, D. and Clark, K. and Classen, L. and Collin, G. H. and Conrad, J. M. and Coppin, P. and Correa, P. and Cowen, D. F. and Cross, R. and Dave, P. and de Andre, J. P. A. M. and De Clercq, C. and DeLaunay, J. J. and Dembinski, H. and Deoskar, K. and De Ridder, Sam and Desiati, P. and de Vries, K. D. and de Wasseige, G. and de With, M. and DeYoung, T. and Diaz-Velez, J. C. and Dujmovic, H. and Dunkman, M. and Dvorak, E. and Eberhardt, B. and Ehrhardt, T. and Eller, P. and Evenson, P. A. and Fahey, S. and Fazely, A. R. and Felde, J. and Filimonov, K. and Finley, C. and Franckowiak, A. and Friedman, E. and Fritz, A. and Gaisser, T. K. and Gallagher, J. and Ganster, E. and Garrappa, S. and Gerhardt, L. and Ghorbani, K. and Glauch, T. and Glsenkamp, T. and Goldschmidt, A. and Gonzalez, J. G. and Grant, D. and Griffith, Z. and Guenduez, M. and Haack, C. and Hallgren, A. and Halve, L. and Halzen, F. and Hanson, K. and Hebecker, D. and Heereman, D. and Helbing, K. and Hellauer, R. and Henningsen, F. and Hickford, S. and Hignight, J. and Hill, G. C. and Hoffman, K. D. and Hoffmann, R. and Hoinka, T. and Hokanson-Fasig, B. and Hoshina, K. and Huang, F. and Hultqvist, K. and Huennefeld, M. and Hussain, R. and In, S. and Iovine, N. and Ishihara, A. and Jacobi, E. and Japaridze, G. S. and Jeong, M. and Jero, K. and Jones, B. J. P. and Kalaczynski, P. and Kang, W. and Kappes, A. and Kappesser, D. and Karg, T. and Karl, M. and Karle, A. and Katz, U. and Kauer, M. and Keivani, A. and Kelley, J. L. and Kheirandish, A. and Kim, J. and Kintscher, T. and Kiryluk, J. and Kittler, T. and Klein, S. R. and Koirala, R. and Kolanoski, H. and Koepke, L. and Kopper, C. and Kopper, S. and Koskinen, D. J. and Kowalski, M. and Krings, K. and Krueckl, G. and Kulacz, N. and Kunwar, S. and Kurahashi, N. and Kyriacou, A. and Labare, Mathieu and Lanfranchi, J. L. and Larson, M. J. and Lauber, F. and Lazar, J. P. and Leonard, K. and Leuermann, M. and Liu, Q. R. and Lohfink, E. and Mariscal, C. J. Lozano and Lu, L. and Lucarelli, F. and Lunemann, J. and Luszczak, W. and Madsen, J. and Maggi, G. and Mahn, K. B. M. and Makino, Y. and Mallot, K. and Mancina, S. and Mari, I. C. and Maruyama, R. and Mase, K. and Maunu, R. and Meagher, K. and Medici, M. and Medina, A. and Meier, M. and Meighen-Berger, S. and Menne, T. and Merino, G. and Meures, T. and Miarecki, S. and Micallef, J. and Momente, G. and Montaruli, T. and Moore, R. W. and Moulai, M. and Nagai, R. and Nahnhauer, R. and Nakarmi, P. and Naumann, U. and Neer, G. and Niederhausen, H. and Nowicki, S. C. and Nygren, D. R. and Pollmann, A. Obertacke and Olivas, A. and O'Murchadha, A. and O'Sullivan, E. and Palczewski, T. and Pandya, H. and Pankova, D., V and Park, N. and Peiffer, P. and de los Heros, C. Perez and Pieloth, D. and Pinat, E. and Pizzuto, A. and Plum, M. and Price, P. B. and Przybylski, G. T. and Raab, C. and Raissi, A. and Rameez, M. and Rauch, L. and Rawlins, K. and Rea, I. C. and Reimann, R. and Relethford, B. and Renzi, G. and Resconi, E. and Rhode, W. and Richman, M. and Robertson, S. and Rongen, M. and Rott, C. and Ruhe, T. and Ryckbosch, Dirk and Rysewyk, D. and Safa, I and Herrera, S. E. Sanchez and Sandrock, A. and Sandroos, J. and Santander, M. and Sarkar, S. and Satalecka, K. and Schaufel, M. and Schlunder, P. and Schmidt, T. and Schneider, A. and Schneider, J. and Schumacher, L. and Sclafani, S. and Seckel, D. and Seunarine, S. and Silva, M. and Snihur, R. and Soedingrekso, J. and Soldin, D. and Song, M. and Spiczak, G. M. and Spiering, C. and Stachurska, J. and Stamatikos, M. and Stanev, T. and Stasik, A. and Stein, R. and Stettner, J. and Steuer, A. and Stezelberger, T. and Stokstad, R. G. and Stossl, A. and Strotjohann, N. L. and Stuttard, T. and Sullivan, G. W. and Sutherland, M. and Taboada, I and Tenholt, F. and Ter-Antonyan, S. and Terliuk, A. and Tilav, S. and Tomankova, L. and Tonnis, C. and Toscano, S. and Tosi, D. and Tselengidou, M. and Tung, C. F. and Turcati, A. and Turcotte, R. and Turley, C. F. and Ty, B. and Unger, E. and Elorrieta, M. A. Unland and Usner, M. and Vandenbroucke, J. and Van Driessche, Ward and van Eijk, D. and van Eijndhoven, N. and Vanheule, Sander and van Santen, J. and Vraeghe, Matthias and Walck, C. and Wallace, A. and Wallraff, M. and Wandkowsky, N. and Watson, T. B. and Weaver, C. and Weiss, M. J. and Weldert, J. and Wendt, C. and Werthebach, J. and Westerhoff, S. and Whelan, B. J. and Whitehorn, N. and Wiebe, K. and Wiebusch, C. H. and Wille, L. and Williams, D. R. and Wills, L. and Wolf, M. and Wood, J. and Wood, T. R. and Woschnagg, K. and Wrede, G. and Xu, D. L. and Xu, X. W. and Xu, Y. and Yanez, J. P. and Yodh, G. and Yoshida, S. and Yuan, T. and Nordin, J.},
  issn         = {0004-6361},
  journal      = {ASTRONOMY & ASTROPHYSICS},
  keywords     = {DIGITAL SKY SURVEY,GAMMA-RAY BURSTS,FOLLOW-UP,SUPERNOVA RATES,IA,SUPERNOVAE,DATA RELEASE,LIGHT-CURVE,PAN-STARRS,SPECTROGRAPH,CALIBRATION,astroparticle physics,neutrinos,supernovae: general},
  language     = {eng},
  pages        = {18},
  title        = {Search for transient optical counterparts to high-energy IceCube neutrinos with Pan-STARRS1},
  url          = {http://dx.doi.org/10.1051/0004-6361/201935171},
  volume       = {626},
  year         = {2019},
}

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