IceCube data for the first Glashow resonance candidate

Posted on by Staff

Introduction

This data release accompanies results published in Nature describing detection of the first candidate Glashow resonance event. The event was found to have a reconstructed visible energy of 6.05 ± 0.72 PeV, consistent with an electron antineutrino interacting via the Glashow resonance. In addition, early pulses were detected on three DOMs that confirm the astrophysical origin of the neutrino and improve directional reconstruction.

For further details, please refer to the IceCube publication https://doi.org/10.1038/s41586-021-03256-1.

Data release

Suggested citation for this dataset:

IceCube Collaboration (2021): IceCube data for the first Glashow resonance candidate. Dataset. DOI: 10.21234/gr2021

Click here to download (.zip, 360 KB)

Included in the download are the following files:

Data files

  • contour_cascade.csv: coordinates for the 90% contour obtained from the cascade reconstruction in Fig. 2 [units of degrees]
    • DEC: declination
    • RA: right ascension

  • contour_hybrid.csv: coordinates for the 90% contour obtained from the hybrid cascade+track reconstruction [units of degrees]
    • DEC: declination
    • RA: right ascension

  • piecewise.csv: measured per-flavor astrophysical neutrino flux in three neutrino-energy bins [units of 1E-8 GeV cm^-2 s^-1 sr^-1]
    • E_min: lower edge of energy bin
    • E_max: upper edge of energy bin
    • y: central value of the measured flux (or 0.0 for upper-limit)
    • y_lower: lower bound of the 68.3% confidence level of the measured flux
    • y_upper: upper bound of the 68.3% confidence level of the measured flux

  • event.txt: four related datasets, each providing information associated with an IceCube DOM. The title of each dataset is marked with “##,” and the header with “#.” All four contain “string” and “om” columns, where “string” is the IceCube string number and “om” is the number of the module on the corresponding string. Additionally:
    • Extracted pulses: associated with the event
      • time[ns]: the time of the extracted pulse
      • charge[pe]: the charge of the extracted pulse
    • Geometry: The origin of the IceCube coordinate system is at 46500’E, 52200’N, at an elevation of 2900 ft (883.9 m), with the y-axis grid north (pointing towards Greenwich, UK) and x-axis grid east
      • x[m]: x coordinate of DOM
      • y[m]: y coordinate of DOM
      • z[m]: z coordinate of DOM
      • rel_dom_eff: the relative DOM efficiency (High quantum efficiency DOMs have rel_dom_eff = 1.35)
    • DOMs inactive or defective: a list of DOMs that were flagged as such at the time when this event occurred
    • Exclusion time windows due to PMT saturation or miscalibration: denotes a time range over which the PMT on the associated DOM was saturated or miscalibrated
      • tw_start[ns]: start of the time window
      • tw_end[ns]: end of the time window

For any questions about this data release, please write to data@icecube.wisc.edu.