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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"

24589 results found.

  1. GRB 180923A: MASTER inspection MAXI/GSC error box
  2. Konus-Wind observation of GRB 180914A
  3. GRB 180914B: GOTO optical detection
  4. IPN Triangulation of GRB 180914A (long)
  5. GRB 180914B: MASTER OT automatic dtection
  6. GRB 180914B: AGILE/MCAL refined analysis
  7. Konus-Wind of the very bright GRB 180914B
  8. GRB 180914B: KAIT Optical Afterglow Candidate
  9. GRB 180914B: Swift-XRT afterglow detection
  10. GRB 180914B: Fermi-LAT detection
  11. GRB 180914A: MASTER automatic inspection
  12. GRB 180914A: Swift-XRT observations
  13. GRB 180914A: Fermi GBM detection
  14. GRB 180914A: Fermi-LAT detection
  15. IceCube-180908A: CALET Gamma-Ray Burst Monitor upper limits
  16. Fermi-LAT Gamma-ray Observations of IceCube-180908A
  17. INTEGRAL observation of IceCube-180908A
  18. Search for counterparts to IceCube-180908A with IceCube
  19. Search for counterpart to IceCube-180908A with ANTARES
  20. IceCube-180908A - IceCube observation of a high-energy neutrino candidate event
  21. GRB 180905A, Swift-BAT refined analysis
  22. GRB 180905A: MITSuME Akeno optical upper limits
  23. GRB 180904A: BOOTES-2/TELMA early observations
  24. GRB 180904A: Swift-BAT refined analysis
  25. GRB 180904A: LT early observations
  26. GRB 180904A: SAO RAS optical observations
  27. GRB 180904A: Swift detection of a burst
  28. Konus-Wind observation of GRB 180828A
  29. GRB 180829A: Swift-XRT observations
  30. GRB 180828A: Swift-BAT refined analysis
  31. GRB 180828A: Fermi GBM observation
  32. GRB 180828A: Swift detection of a GRB or possible Galactic Transient Swift J1754.9-2548
  33. GRB 180728A: classification of the associated SN 2018fip
  34. Konus-Wind observation of GRB 180824A
  35. GRB 180824A: MASTER inspection IPN short GRB error box
  36. GRB 180823A, Swift-BAT refined analysis
  37. IPN Triangulation of GRB 180824A (short)
  38. GRB 180823A: Swift detection of a burst
  39. GRB 180821A: VLT observations
  40. GRB 180821A: Swift-BAT refined analysis
  41. GRB 180821A: Swift-XRT refined Analysis
  42. GRB 180821A: LCO Siding Springs observations
  43. GRB 180818B: Swift-XRT refined Analysis
  44. GRB 180818B: Swift-BAT refined analysis
  45. GRB 180818A: Swift-BAT refined analysis
  46. GRB 180818B: Fermi GBM observations
  47. GRB 180818B: Swift detection of a burst
  48. GRB 180728A: discovery of the associated supernova
  49. GRB 180809A: further Swift/XRT observations
  50. GRB 180812A: Swift-BAT refined analysis
  51. GRB 180812A: Fermi GBM detection
  52. GRB 180812A: Swift detection of a burst
  53. Konus-Wind observation of GRB 180809B
  54. GRB180809B TUG T60 observations
  55. MASTER: OT detection during two Fermi GBM triggers (555263883 and 555263883) error boxes inspection in 22.5 mag SDSS galaxy direction
  56. GRB 180809B: Swift-XRT refined Analysis
  57. GRB 180809B, Swift-BAT refined analysis
  58. Konus-Wind observation of GRB 180806A
  59. GRB 180809A: Fermi GBM observation
  60. GRB 180809A: CALET Gamma-Ray Burst Monitor detection
  61. GRB180809B: MASTER Triple Independent Automatic OT Detection
  62. GRB 180809B: LCO Sutherland observations
  63. GRB 180809B: GROND Detection of the NIR Afterglow
  64. GRB180809B: MASTER OT observation
  65. GRB 180809A: Swift-XRT afterglow detection
  66. GRB 180806A: Fermi GBM detection
  67. GRB 180806.94: MASTER possible OT detection in Fermi GMB trigger 555287944 error box
  68. GRB 180805B: ESO/NTT optical observations
  69. GRB 180805B: 1.5m OSN I-band observation
  70. GRB 180805B: VLT optical and near-infrared observations
  71. GRB 180805B: MASTER optical late inspection short GRB with extended emission
  72. GRB 180805B: Swift-BAT refined analysis (short GRB with extended emission)
  73. GRB 180805A: Swift-BAT refined analysis
  74. GRB 180805B: Fermi GBM detection
  75. GRB 180805A: Swift detection of a burst
  76. Fermi Trigger 554765006: MASTER optical inspection
  77. FRB 180725A: MASTER optical observations of the Fast Radio Burst error box
  78. GRB 180728B: MASTER optical observations short GRB IPN error box
  79. GRB 180701A/MAXI J2119-045: CALET Gamma-Ray Burst Monitor data search
  80. Konus-Wind observation of the bright nearby GRB 180728A
  81. Konus-Wind observation of GRB 180728B
  82. GRB 180715A: CALET CAL gamma-ray analysis
  83. GRB 180703B: CALET CAL gamma-ray analysis
  84. GRB 180728B: Fermi GBM detection
  85. IPN Triangulation of GRB 180728B (short)
  86. GRB 180728A: Swift-BAT refined analysis
  87. GRB 180728A: Fermi GBM observation
  88. GRB 180728A: MASTER OT (= new object) detection
  89. GRB 180727A: Swift-BAT refined analysis
  90. GRB 180728A: Swift detection of a bright burst
  91. GRB 180727A: Fermi GBM observation
  92. GRB 180720B: CALET Gamma-Ray Burst Monitor detection
  93. GRB 180720B: OAJ optical observations
  94. GRB 180722B: Insight-HXMT/HE detection
  95. GRB 180720B long follow up requested
  96. GRB 180723A: Fermi GBM detection
  97. GRB 180721A: KAIT Optical Upper Limit
  98. GRB 180720B: KAIT Optical Observations
  99. GRB 180722A: Swift-XRT observations
  100. GRB 180718B: Swift-XRT observations

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