IceCube realtime alert:

Report generated (UTC):2023-05-12 09:12:26
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 J0258.1+203044.5420.51MG3 J025805+2029Search Simbad1.31LCR FAVA DX
4FGL J0248.0+223242.0122.551RXS J024800.1+223136Search Simbad1.84LCR FAVA DX
4FGL J0259.5+192444.8819.41TXS 0256+192Search Simbad2.42LCR FAVA DX
4FGL J0245.4+240841.3524.15B2 0242+23Search Simbad3.37LCR FAVA DX
4FGL J0237.3+200039.3320.00Search Simbad4.34LCR FAVA DX
4FGL J0250.6+171242.6617.21RGB J0250+172Search Simbad4.44LCR FAVA DX
4FGL J0312.7+201248.2020.22Search Simbad4.44LCR FAVA DX
4FGL J0301.2+254645.3125.78Search Simbad4.49LCR FAVA DX
4FGL J0251.0+260542.7626.09PSR J0251+26Search Simbad4.63LCR FAVA DX
4FGL J0242.6+173540.6617.60TXS 0239+175Search Simbad4.86LCR 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 J0243.3+191540.8519.26Search Simbad3.49LCR FAVA DX
3FHL J0250.5+171242.6517.21NVSS J025037+171209Search Simbad4.43LCR FAVA DX
3FHL J0312.7+201348.2020.22Search Simbad4.44LCR 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 J0253.0+171243.2617.214.35PowerLaw11.031.211e-08N/ASpectrum plot FITS file npy file
PS J0231.9+203837.9920.655.37PowerLaw11.666.839e-09N/ASpectrum plot FITS file npy file
4FGL J0238.6+163739.6716.626.21LogParabola16.175.118e-089.794e-09Spectrum plot FITS file npy file
4FGL J0325.7+222551.4422.437.26LogParabola9.818.583e-081.388e-09Spectrum plot FITS file npy file
PS J0225.0+183936.2518.667.53PowerLaw12.232.185e-08N/ASpectrum plot FITS file npy file
4FGL J0237.8+284839.4728.808.19LogParabola25.658.756e-081.187e-08Spectrum 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]5.6 deg
Moon separation [deg]95.4 deg