IceCube realtime alert:

Report generated (UTC):2023-07-24 03:11:04
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 J0836.2+2141129.0521.70MG2 J083615+2138Search Simbad1.99LCR FAVA DX
4FGL J0823.3+2224125.8422.41OJ 233Search Simbad2.08LCR FAVA DX
4FGL J0828.0+2307127.0223.12NVSS J082801+231215Search Simbad2.39LCR FAVA DX
4FGL J0816.9+2050124.2320.85SDSS J081649.78+205106.4Search Simbad2.76LCR FAVA DX
4FGL J0829.0+1755127.2717.92TXS 0826+180Search Simbad2.82LCR FAVA DX
4FGL J0817.1+1955124.2819.93CRATES J081705+195836Search Simbad2.84LCR FAVA DX
4FGL J0831.5+1747127.8917.79GB6 J0831+1746Search Simbad3.03LCR FAVA DX
4FGL J0830.8+2410127.7024.17S3 0827+24Search Simbad3.47LCR FAVA DX
4FGL J0820.9+2353125.2323.89GB6 J0820+2353Search Simbad3.63LCR FAVA DX
4FGL J0839.4+1803129.8718.06TXS 0836+182Search Simbad3.69LCR FAVA DX
4FGL J0824.4+2440126.1124.67B2 0821+24Search Simbad4.05LCR 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 J0816.9+2050124.2420.85SDSS J081649.78+205106.4Search Simbad2.75LCR FAVA DX
3FHL J0820.9+2353125.2323.89SDSS J082051.20+235345.2Search Simbad3.63LCR 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 J0828.8+1747127.2117.792.95PowerLaw12.407.566e-09N/ASpectrum plot FITS file npy file
4FGL J0830.8+2410127.7024.173.47LogParabola13.092.893e-081.265e-09Spectrum plot FITS file npy file
PS J0853.1+2010133.2920.175.75PowerLaw7.722.364e-08N/ASpectrum plot FITS file npy file
4FGL J0831.4+2631127.8726.525.82PowerLaw50.348.223e-081.797e-10Spectrum plot FITS file npy file
4FGL J0803.5+2046120.8920.775.88PowerLaw12.475.970e-081.603e-10Spectrum plot FITS file npy file
PS J0856.7+1956134.2019.946.63PowerLaw7.191.058e-08N/ASpectrum plot FITS file npy file
PS J0757.3+1824119.3318.417.76PowerLaw11.994.782e-10N/ASpectrum plot FITS file npy file
PS J0758.3+2412119.6024.207.81PowerLaw15.543.422e-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]4.1 deg
Moon separation [deg]65.5 deg