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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"

14941 results found.

  1. GRB 130925A: Initial Similarities to Swift J1644+57
  2. GRB 130925A: MAXI/GSC detection
  3. GRB 130925A: Swift detection of a burst
  4. INTEGRAL detection of a SGR-like burst likely from SGR J1745-29
  5. GRB 130919A: Swift detection of a burst
  6. Fermi/GBM Detection of two SGR-like bursts possibly associated with SGR J1833-0832
  7. Konus-Wind observation of GRB 130912A
  8. GRB 130912A: Fermi GBM detection
  9. GRB 130912A: Swift detection of a short burst
  10. GRB 130907A: AMI radio detection
  11. GRB 130907A: WSRT radio detection
  12. GRB 130828A: Further Swift XRT observations
  13. GRB 130907A: VLA detection
  14. Errata of GRB name in GCN 15196: should have been GRB 130907A instead of GRB 120916A
  15. GRB 120916A: Fermi-LAT detection of a burst
  16. GRB 130907A: Swift/UVOT Detection
  17. GRB 130907A: Early Tautenburg detections, red afterglow
  18. GRB 130907A: Swift detection of a burst with an optical counterpart
  19. Swift follow-up results of the possible weak INTEGRAL GRB
  20. GRB 130831B: Swift detection of a burst
  21. GRB 130831A: Swift detection of a burst with an optical counterpart
  22. GRB 130829A: Swift detection of a burst
  23. GRB 130828A: Fermi GBM detection
  24. GRB 130828A: Fermi-LAT detection of a burst
  25. Konus-Wind observation of GRB 130821A
  26. GRB 130821A: Fermi-LAT detection of a burst
  27. GRB 130821A: Fermi GBM Detection
  28. GRB 130822A: Swift detection of a short burst
  29. GRB 130816B: Swift detection of a burst
  30. GRB 130816A: Swift detection of a burst
  31. GRB 130812A: Swift detection of a burst
  32. GRB 130807A: Swift detection of a GRB or Galactic transient
  33. Konus-Wind observation of GRB 130804A
  34. GRB 130623A: GROND detection of the optical/NIR afterglow
  35. GRB130803A: GROND observations
  36. GRB 130806A: Swift detection of a burst
  37. Trigger 565443: Swift detection of a burst from SGR J1745-29
  38. GRB130803A: GROND detection of possible host
  39. GRB 130803A: Swift detection of a burst
  40. GRB 130727A: Watcher optical limit
  41. GRB 130727A: Swift/UVOT Detection
  42. GRB 130727A: Fermi GBM detection
  43. GRB 130727A: Swift detection of a burst
  44. GRB 130725B: Swift/UVOT Observations
  45. GRB 130725B: GROND Detection of the Optical/NIR Afterglow
  46. GRB 130725B: Swift/UVOT Detection of an Optical Counterpart
  47. GRB 130725B: Swift detection of a burst
  48. GRB 130722A: Swift/UVOT Detection
  49. GRB 130722A: Swift detection of a burst
  50. GRB 130719A: Swift detection of a burst
  51. GRB 130715A: Fermi GBM detection
  52. GRB 130626A: Retraction of possible X-ray afterglow
  53. GMRT radio detection of GRB 130702A
  54. GRB130702A: NOT observation - the detection of an emerging supernova
  55. GRB 130702A: VLA detection
  56. GRB 130702A: WSRT radio detection
  57. Konus-Wind observation of GRB 130702A
  58. GRB 130702A: CARMA 3mm detection
  59. Fermi GRB 130702A: Swift XRT and UVOT observations
  60. GRB 130702A / Fermi394416326: Fermi GBM detection
  61. GRB 130702A / Fermi394416326 : Fermi-LAT detection of a burst
  62. GRB 130628A: Fermi GBM detection
  63. Fermi394416326: FTN detection
  64. Fermi394416326: iPTF detection of a possible optical afterglow
  65. GRB 130701B: Fermi GBM detection
  66. GRB 130701A: P60 Observations
  67. GRB 130701A: Swift/UVOT Detection
  68. GRB 130701A: Swift detection of a burst
  69. GRB 130627B: Possible Swift-XRT afterglow detection
  70. GRB 130627A: Fermi GBM detection
  71. GRB 130623A: Fermi GBM detection
  72. GRB 130626A: Swift-XRT possible detection and UVOT upper limits
  73. GRB 130627B: Swift detection of a burst
  74. GRB 130627A: Swift detection of a burst
  75. GRB 130626A: Swift detection of a short burst
  76. GRB 130625A: Swift detection of a burst
  77. GRB 130623A detected in ground analysis of Swift-BAT data
  78. Swift Trigger 558828 is not an interesting event
  79. Swift Trigger 558631 is not a real source
  80. GRB 130603B: Analogy with GRB 090510A and possible connection with a supernova
  81. Trigger 558399: Swift detection of the Soft Gamma Repeater AXP 1E1547.0-5408
  82. GRB 130615A: Continued Skynet/PROMPT Observations
  83. GRB 130614A: Fermi GBM detection
  84. GRB 130615A: Swift detection of a burst
  85. GRB 130603B: Detection of possible afterglow/kilonova in HST observations
  86. GRB 130606B: Suzaku WAM observation of the prompt emission
  87. GRB 130612A: Swift/UVOT Detection
  88. GRB 130612A: Skynet/PROMPT detection of the optical afterglow
  89. GRB 130612A: Liverpool Telescope Afterglow detection
  90. GRB 130612A: Swift detection of a burst with an optical counterpart
  91. GRB 130610A: Swift/UVOT Observations
  92. GRB 130610A: Skynet/PROMPT detection of the optical afterglow
  93. GRB 130610A: Swift detection of a burst with an optical counterpart
  94. GRB 130609B: Swift detection of a burst with an optical counterpart
  95. GRB 130606A - Liverpool Telescope and Faulkes Telescope North optical observations
  96. GRB 130609A: P60 nondetection
  97. GRB 130609A: Swift detection of a burst
  98. GRB 130608A: Swift detection of a burst
  99. GRB 130606A: EVLA detection
  100. GRB 130606A: Skynet/PROMPT detection of the optical afterglow

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