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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

44 results found.

  1. LIGO/Virgo S190728q: New optical candidates from the DESGW program
  2. LIGO/Virgo S190728q: AT2019lvw 10.4m GTC spectroscopy
  3. LIGO/Virgo S190728q: AT2019lzc 10.4m GTC spectroscopy
  4. LIGO/Virgo S190728q: AT2019lzt 10.4m GTC spectroscopy
  5. LIGO/Virgo S190728q: No counterpart candidates in H.E.S.S. observations
  6. LIGO/Virgo S190728q: Correction to GCN #25235: also PS19dxm and DG19zrjmb are not associated with S190728q
  7. LIGO/Virgo S190728q: ZTF Forced Photometry for PS1 and DECam-GROWTH optical candidates, and a note on DECam Photometry from GCN 25215
  8. LIGO/Virgo S190728q: MITSuME Okayama and Bisei Follow-Up of ZTF19abjethn (AT2019lvs)
  9. LIGO/Virgo S190728q: Optical transients from Pan-STARRS coverage during first 2 nights
  10. LIGO/Virgo S190728q: GRAWITA VST-ESO PARANAL observations
  11. LIGO/Virgo s190728q: ePESSTO+ NTT classification of AT2019lvt as a type-Ia SN
  12. LIGO/Virgo S190728q/IceCube neutrino candidate: No counterpart candidates in the Swift-XRT Observations
  13. LIGO/VIRGO S190728q: No candidate counterparts from ATLAS observations
  14. S190728q: MASTER multiple previous outbursts detection of ZTF19abjethn=AT2019lvs
  15. LIGO/Virgo S190728q: Optical Counterpart Candidates from DECam-GROWTH
  16. LIGO/Virgo S190728q: No transient candidates in CALET observations
  17. LIGO/Virgo S190728q: No counterpart candidates in KAIT observations
  18. LIGO/Virgo S190728q: ZTF19abjethn TShAO and NUTTelA-TAO optical observations / classification
  19. LIGO/Virgo S190728q: Third update on neutrino search with IceCube
  20. LIGO/Virgo S190728q: Classification of AT2019lvs/ZTF19abjethn as a CV
  21. LIGO/Virgo S190728q: Update on Sky-Localization and Source-Classification
  22. LIGO/Virgo S190728q: ZTF19abjethn is inconsistent with new GW localization
  23. LIGO/Virgo S190728q: LCO Follow-Up of ZTF19abjethn (AT2019lvs)
  24. IPN triangulation of GRB 190728A (short)
  25. LIGO/Virgo S190728q: Pan-STARRS detection of the transient AT2019lvs/ZTF19abjethn 18hrs before S190728q
  26. LIGO/Virgo S190728q: declination for GCN 25202
  27. LIGO/Virgo S190728q: Identification of a Faint Blue Static Source at the Location of ZTF19abjethn
  28. LIGO/Virgo S190728q: Photometric Redshift and Stellar Mass Estimates for the Potential Host Galaxy of Optical Counterpart Candidate ZTF19abjethn
  29. LIGO/Virgo S190728q: No counterpart candidates in the Swift/BAT Observations
  30. LIGO/Virgo S190728q: Optical Candidate from the Zwicky Transient Facility ZTF19abjethn
  31. LIGO/Virgo S190728q: No counterpart candidates in Fermi-LAT observations
  32. LIGO/Virgo S190728q: Second update on neutrino search with IceCube
  33. LIGO/Virgo S190728q: Upper limits from Fermi-GBM Observations
  34. LIGO/Virgo S190728q: no counterpart candidates in AGILE-GRID observations
  35. LIGO/Virgo S190728q : no neutrino counterpart candidate in ANTARES search
  36. LIGO/Virgo S190728q: No counterpart candidates in AGILE-MCAL observations
  37. LIGO/Virgo S190728q: One neutrino candidate from IceCube search
  38. LIGO/Virgo S190728q: No counterpart candidates in HAWC observations
  39. LIGO/Virgo S190728q: No counterpart candidates in INTEGRAL SPI-ACS prompt observation
  40. LIGO/Virgo S190728q: SPI-ACS/INTEGRAL data analysis
  41. LIGO/Virgo S190728q: Coverage and upper limits from MAXI/GSC observations
  42. LIGO/Virgo S190728q: Identification of a GW compact binary merger candidate
  43. LIGO/Virgo S190728q: Upper limits from IceCube neutrino searches
  44. LIGO/Virgo S190728q Global MASTER-Net observations report

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