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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"

24588 results found.

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

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