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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"

11560 results found.

  1. Konus-Wind observation of GRB 140723A
  2. GRB 140723A: LCO-Sutherland optical candidate
  3. GRB 140723A: Fermi GBM detection
  4. IPN Triangulation of GRB 140723A
  5. GRB 140723A Tiled Swift observations
  6. GRB 140723A: Fermi-LAT detection
  7. Konus-Wind observation of GRB 140721A
  8. IPN Triangulation of GRB 140721A
  9. GRB 140721A: Fermi GBM detection
  10. Konus-Wind observation of GRB 140716A
  11. GRB 140716A: Swift-XRT detection of an afterglow candidate
  12. GRB 140716A: A Fermi GBM Detection
  13. GRB 140716A found in ground analysis of Swift-BAT data
  14. GRB 140714A: Fermi GBM detection
  15. GRB 140713A: Fermi GBM detection
  16. GRB 140710B: Fermi GBM detection
  17. Fermi GBM Observations of SGR 1935+2154
  18. GRB 140709B: Fermi GBM detection
  19. GRB 140709A: Fermi GBM detection
  20. Fermi GBM trigger 140708682 is not a GRB
  21. GRB 140706A: Fermi GBM detection
  22. GRB 140621A: Suzaku WAM observation of the prompt emission
  23. GRB 140703A: Fermi GBM detection
  24. Fermi 425667201: optical counterpart search
  25. GRB 140619B: Magellan near-infrared observations
  26. GRB 140623A: further Swift-XRT observations
  27. GRB 140619B: Suzaku WAM observation of the prompt emission
  28. GRB140606B/iPTF14bfu: Keck detection of an associated supernova
  29. GRB 140620A / iPTF14cva: TShAO optical observations
  30. GRB 140624A: Fermi GBM observation of a short burst
  31. GRB 140623A: Swift-XRT and UVOT observations
  32. GRB 140623A / iPTF14cyb: Fermi GBM detection
  33. GRB 140621A: Fermi GBM detection
  34. IPN Triangulation of GRB 140621A
  35. Fermi 425193729 / iPTF14cyb: Discovery of optical afterglow
  36. GRB 140620A / iPTF14cva: Konkoly optical observations
  37. GRB 140620A: Swift/UVOT Detection
  38. GRB 140606B / iPTF 14bfu: SAO RAS optical observations
  39. GRB 140620A: Swift-XRT observations
  40. GRB 140620A / iPTF14cva: Fermi GBM observations
  41. Fermi 424934131 / iPTF14cva: Discovery and Redshift of Optical Afterglow
  42. GRB 140619B: Swift-XRT observations
  43. GRB 140619B: Fermi-LAT Detection
  44. GRB 140619B: Fermi GBM detection of a short GRB
  45. GRB 140606B / iPTF 14bfu: Mondy optical observations
  46. GRB 140606B / iPTF 14bfu: AAO optical observations
  47. GRB 140610A: Fermi GBM Detection
  48. Konus-Wind observation of GRB 140606B
  49. GRB 140606B: Swift XRT refined analysis
  50. IPN Triangulation of GRB 140606B
  51. GRB 140606B: Swift/UVOT Upper Limits
  52. GRB140606B/iPTF14bfu: Discovery Channel Telescope Optical Detection
  53. GRB 140606B: Swift XRT position
  54. GRB 140606B / Fermi 432717114 / iPTF 14bfu: Keck redshift
  55. GRB 140606B: Fermi GBM detection
  56. Fermi 423717114: Additional P48 and P60 observations
  57. Fermi423717114: iPTF optical transient candidates
  58. GRB 140523A: further Swift-XRT observations
  59. GRB 140528A: Fermi GBM Detection
  60. IPN Triangulation of GRB 140528A
  61. Fermi GBM trigger 422752719/ 140525971 is not a GRB
  62. GRB 140523A: NOT observation
  63. Konus-Wind observation of GRB 140523A
  64. IPN Triangulation of GRB 140523A
  65. GRB 140523A: possible X-ray afterglow candidate from tiled Swift/XRT observations
  66. GRB 140523A Tiled Swift observations
  67. GRB 140523A: Fermi-LAT detection
  68. GRB 140523A: Fermi GBM detection
  69. GRB 140521A: Fermi GBM Detection
  70. GRB 140512A: MASTER prompt and afterglow optical observations
  71. GRB 140508A: VLA detection
  72. Konus-Wind observation of GRB 140512A
  73. GRB 140512A: Fermi GBM detection
  74. Swift Observations of GRB 140508A
  75. Fermi GBM Trigger 140429551 - Detection of a burst from SGR 1806-20
  76. GRB 140508A: Swift/UVOT Detection
  77. Konus-Wind observation of GRB 140508A
  78. GRB 140508A: Swift-XRT observations
  79. GRB 140508A: SAO RAS and MASTER photometric and spectroscopic observations
  80. GRB 140508A: iPTF optical transient candidate
  81. IPN triangulation of GRB 140508A
  82. GRB 140508A: Fermi GBM detection
  83. Konus-Wind observation of GRB 140506A
  84. GRB 140506A: Fermi GBM Detection
  85. GRB 140502A: Fermi GBM observation
  86. GRB 140501A: Fermi GBM detection
  87. GRB 140428B: Fermi GBM observation
  88. IPN Triangulation of GRB 140428B (short/hard)
  89. GRB 140423A: Fermi GBM observation
  90. Konus-Wind observation of GRB 140416A
  91. IPN Triangulation of GRB 140416A (long/very intense)
  92. GRB 140416A: Fermi GBM detection
  93. Fermi418277210: iPTF optical observations
  94. GRB 140408A: Fermi GBM detection
  95. GRB 140406A: Fermi GBM observation
  96. GRB 140402A: Deep limit on the optical afterglow from Magellan observations
  97. GRB 140402A: Swift-XRT observations
  98. GRB 140402A: MASTER optical observations
  99. GRB 140402A BAT refined analysis
  100. GRB 140402A: Marginal BAT detection

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