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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"

24564 results found.

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

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