IceCube realtime alert:

Report generated (UTC):2023-05-12 00:28:19
Current time (UTC):

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Alert properties

Event type:
RA (J2000) [deg]:
Dec (J2000) [deg]:
Error radius [deg]:
Trigger time:
Run ID:
Event ID:
GCN Notice:

Skymaps

All-sky equatorial
All-sky Galactic

Nearby 4FGL sources

Fermi sources are shown within a 5 deg radius from the alert best-fit position. Sources contained within the error circle of the alert are highlighted in color. For sources with a known association, "Search Simbad" returns an identifier query using the association name listed (note that in many cases the association name is not resolved by Simbad). If no association is listed, return a radial search 0.3 deg around the Fermi source position.

NameRA [deg]Dec [deg]AssociationSearchDistance [deg]MWL
4FGL J2256.7+1307344.1813.12NVSS J225624+130541Search Simbad1.58LCR FAVA DX
4FGL J2308.9+1111347.2511.20MG1 J230850+1112Search Simbad2.01LCR FAVA DX
4FGL J2252.6+1245343.1712.752MASS J22523220+1245109Search Simbad2.29LCR FAVA DX
4FGL J2253.7+1405343.4514.09NVSS J225354+140439Search Simbad2.76LCR FAVA DX
4FGL J2307.6+1451346.9214.86MG1 J230734+1449Search Simbad3.13LCR FAVA DX
4FGL J2314.0+1445348.5114.75RGB J2313+147Search Simbad4.01LCR FAVA DX
4FGL J2257.5+0748344.397.80OY 91Search Simbad4.41LCR FAVA DX
4FGL J2253.9+1609343.5016.153C 454.3Search Simbad4.46LCR FAVA DX
4FGL J2317.3+1433349.3314.57PSR J2317+1439Search Simbad4.55LCR FAVA DX

Nearby 3FHL sources

Fermi sources are shown within a 5 deg radius from the alert best-fit position. Sources contained within the error circle of the alert are highlighted in color. For sources with a known association, "Search Simbad" returns an identifier query using the association name listed (note that in many cases the association name is not resolved by Simbad). If no association is listed, return a radial search 0.3 deg around the Fermi source position.

NameRA [deg]Dec [deg]AssociationSearchDistance [deg]MWL
3FHL J2307.7+1451346.9314.87MG1 J230734+1449Search Simbad3.13LCR FAVA DX
3FHL J2314.0+1445348.5014.75RGB J2313+147Search Simbad4.01LCR FAVA DX
3FHL J2253.9+1608343.4916.153C 454.3Search Simbad4.46LCR FAVA DX

Fermi-LAT prompt analysis

Fermi-LAT analysis of the alert over two different timescales of one month and the full mission.

One month results

Results per source

Fermi sources with a TS > 9 are included in this list. Links are provided for the spectral fits results as a plot, and in FITS and npy format.

NameRA [deg]Dec [deg]Distance [deg]Spectrum typeTSFlux above 100 MeV [ph cm^-2 s^-1]4FGL-DR3 flux above 100 MeV [ph cm^-2 s^-1]Result files
PS J2309.3+1459347.3314.993.43PowerLaw10.026.102e-09N/ASpectrum plot FITS file npy file
4FGL J2253.9+1609343.5016.154.46PLSuperExpCutoff2305.093.114e-077.406e-08Spectrum plot FITS file npy file
PS J2311.1+1650347.7816.855.27PowerLaw9.942.448e-08N/ASpectrum plot FITS file npy file
4FGL J2250.4+1748342.6217.816.32PowerLaw8.674.088e-082.516e-10Spectrum plot FITS file npy file
4FGL J2327.5+0939351.909.656.82LogParabola36.441.289e-079.015e-10Spectrum plot FITS file npy file
PS J2234.3+0947338.609.797.08PowerLaw8.511.443e-08N/ASpectrum plot FITS file npy file
4FGL J2232.6+1143338.1511.737.11LogParabola2249.959.281e-074.129e-08Spectrum plot FITS file npy file
PS J2232.0+0808338.028.158.28PowerLaw13.482.129e-08N/ASpectrum plot FITS file npy file

Fermi-LAT GeV photons

GeV photons observed from the direction of the alert over the last month

Interactive skymap

The interactive window shows a background of the Fermi (color) skymap and markers for nearby sources in three HE catalogs: 4FGL, 3FHL, and 2WHSP. Other catalogs (2RXS and BZCat) plus a dynamic HiPS search in Simbad can be enabled from the layer control of the left. An additional Simbad search shows a selection of objects (detected in radio, X-rays, gamma-rays and/or galaxies) near the best fit position. The background sky can be changed to optical (Mellinger survey) from the radio buttons below the image.

Visibility

Visibility plots (elevation vs time) for four ground-based instruments over the next hours for the alert. Dark (light) bands indicate civil (astronomical) twilights for each site. Moon and sun elevations are also shown.

Swift visibility

Visibility conditions for Swift at the time of the report generation based on the distance of the alert position to the Sun and Moon. Red or green colors indicate if the position is observable (>23 deg away from the Moon and >47 away from the Sun).

Sun separation [deg]60.7 deg
Moon separation [deg]44.3 deg