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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. 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.

Advanced Search Examples (click to copy):

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

24559 results found.

  1. GRB 160525A: Swift detection of a probable burst
  2. GRB 160425A: SMARTS late-time observations
  3. GRB 160521B: Swift-XRT observations
  4. GRB 160521B: Fermi-LAT detection
  5. GRB 160521B: Fermi GBM detection
  6. GRB 160521A: a long GRB detected by INTEGRAL
  7. GRB 160519A: Swift-BAT refined analysis
  8. GRB 160519A: Fermi GBM detection
  9. Konus-Wind observation of a bright burst from SGR 1935+2154
  10. FERMI GBM bursts from the magnetar SGR 1935+2154
  11. GRB 160519A: Swift detection of a burst
  12. GRB 160509A: Further VLA Observations
  13. FACT follow-up of the IceCube event 160427A
  14. Interplanetary Network Search for IceCube 160427A
  15. GRB 160509A MASTER-NET observations
  16. GRB 160509A: CALET Gamma-Ray Burst Monitor detection
  17. GRB 160509A: non-observation of VHE emission with HAWC
  18. GRB 160508A: CALET Gamma-Ray Burst Monitor detection
  19. GRB 160509A: TLS Tautenburg Afterglow Detection
  20. Konus-Wind observation of GRB 160509A
  21. GRB 160509A: MAXI/GSC refined analysis
  22. GRB 160509A: Fermi-LAT refined analysis
  23. GRB 160509A: Fermi GBM Detection
  24. GRB 160509A Gemini North candidate afterglow
  25. GRB 160509A: Swift-XRT afterglow detection
  26. GRB 160509A: Fermi-LAT prompt detection of a very bright burst
  27. LIGO/Virgo G211117: Astrosat CZTI upper limits
  28. GRB 160506A: Swift-XRT refined Analysis
  29. GRB 160506A: Swift-BAT refined analysis
  30. GRB 160504A: Swift-BAT refined analysis
  31. IceCube-160427A: iPTF Observations
  32. GRB160504A: Gemini NIR Observations
  33. GRB 160504A: Swift detection of a burst
  34. ICECUBE-160427A : Pan-STARRS imaging and optical transients in the field
  35. GRB 160503A: Fermi GBM observation
  36. GRB 160503A: Fermi-LAT detection
  37. GRB 160501A: SMARTS optical/IR observations
  38. GRB 160501A: Swift-BAT refined analysis
  39. GRB 160501A: MITSuME Okayama upper limits
  40. GRB 160501A MASTER-NET early observations
  41. IceCube-160427A: Fermi GBM Observations
  42. MASTER search for counterpart to the IceCube event 67093193 (run 127853)
  43. Archival observations by HAWC of IceCube HESE event of April 27, 2016
  44. Fermi/LAT search for counterpart to the IceCube event 67093193 (run 127853)
  45. LSGT observation of GRB 160425A
  46. GRB 160425A: Skynet PROMPT-CTIO observations of the optical afterglow
  47. GRB 160425A: Swift-BAT refined analysis
  48. GRB 160425A: SMARTS optical/IR observations
  49. GRB 160325A: Skynet PROMPT-CTIO observations of the optical afterglow
  50. GRB 160425A MASTER notices: possible host galaxy in the optical error-box
  51. GRB 160425A: Swift-XRT refined Analysis
  52. GRB 160422A: CALET Gamma-Ray Burst Monitor detection
  53. GRB 160425A : MASTER earlier optical observations
  54. Konus-Wind observation of GRB 160424A
  55. LIGO/Virgo G197392 / LVT151012: Identification of a GW CBC Candidate
  56. GRB 160424A: Fermi GBM observation
  57. GRB 160424A: Swift-BAT refined analysis
  58. GRB 160424A: Swift detection of a burst
  59. GRB 160422A: Fermi GBM observation
  60. GRB 160422A: Fermi-LAT Detection
  61. GRB 160419A, Swift-BAT refined analysis
  62. GRB 160419A: Fermi GBM detection
  63. GRB 160419A: Swift detection of a burst
  64. GRB 160417A: Swift-BAT refined analysis
  65. GRB 160417A: iTelescope T11 optical observations
  66. GRB 160417A: MITSuME Okayama upper limits
  67. GRB 160417A: KAIT optical afterglow confirmation
  68. LIGO/Virgo G211117: EWE for NOWT of 12 days follow-up of northern sky
  69. GRB 160412A: GROND upper limits
  70. Konus-Wind observation of GRB 160409A
  71. GRB 160410A: SMARTS optical/IR observations
  72. GRB 160410A: TLS Tautenburg observations
  73. Swift Trigger 682614 is not a GRB
  74. GRB 160411A: Swift-BAT refined analysis of the short burst
  75. GRB 160412A: Swift-BAT refined analysis
  76. GRB 160410A: further NOT optical observations
  77. GRB 160411A: Fermi GBM detection
  78. Konus-Wind observation of GRB 160410A (short/hard)
  79. GRB 160410A: MITSuME Akeno optical upper limits
  80. GRB 160411A: MASTER-NET early optical observations.
  81. GRB 160411A: Swift-XRT observations
  82. GRB 160411A: Swift detection of a short burst
  83. GRB 160410A: Keck-I/LRIS redshift
  84. GRB 160410A: Skynet PROMPT-CTIO observations of the optical afterglow
  85. GRB 160410A: Swift-BAT refined analysis of the short GRB
  86. GRB 160408A: TLS Tautenburg observations
  87. GRB 160408A: Fermi GBM detection
  88. GRB 160406A: Fermi GBM observation
  89. GRB 160408A: Swift-BAT refined analysis
  90. GRB 160408A: Gemini optical observations
  91. GRB 160408A: Swift detection of a short burst
  92. IPN Triangulation of GRB 160406A (short/hard)
  93. GRB 160401A: LT observations
  94. GRB 160401A: MASTER-IAC prompt optical observations
  95. GRB 160401A: a long GRB detected by INTEGRAL
  96. LIGO/Virgo G211117: LOFAR follow-up
  97. GRB 160324A: CALET Gamma-Ray Burst Monitor detection
  98. GRB 160327A: Early RAPTOR Limits
  99. GRB 160327A: Imaging and spectroscopy from GTC
  100. Konus-Wind observation of GRB 160325A

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