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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"

5184 results found.

  1. GRB 140706A: Swift-XRT refined Analysis
  2. GRB 140706A: Swift detection of a burst with an optical counterpart
  3. GRB 140705A / SGR 1935+2154: Optical observations from 10.4m GTC
  4. GRB 140705A: Swift-XRT refined Analysis
  5. GRB 140703A: Swift-XRT refined Analysis
  6. GRB 140703A: MASTER optical observations
  7. GRB 140629A: MITSuME Akeno Optical observation
  8. GRB 140629A: Swift-XRT refined Analysis
  9. GRB 140629A: MITSuME Ishigakijima Optical Observation
  10. GRB 140629A: MASTER OT detection
  11. GRB 140628A: Swift-XRT refined Analysis
  12. GRB 140626A: Swift-XRT refined Analysis
  13. GRB 140619B: Suzaku WAM observation of the prompt emission
  14. GRB140606B/iPTF14bfu: Keck detection of an associated supernova
  15. GRB 140624A: Fermi GBM observation of a short burst
  16. GRB 140621A: Fermi GBM detection
  17. GRB 140622A: Swift-XRT refined Analysis
  18. GRB 140622A: An unusual short event, Swift-BAT refined analysis
  19. GRB 140620A: Swift-XRT observations
  20. GRB 140619B: Fermi-LAT Detection
  21. GRB 140619B: Fermi GBM detection of a short GRB
  22. GRB 140619A: Swift-XRT refined Analysis
  23. GRB 140614B: Swift-XRT refined Analysis
  24. GRB 140614A: Swift-XRT refined Analysis
  25. GRB 140614A: GROND afterglow candidate
  26. GRB 140610A: Fermi GBM Detection
  27. GRB 140610A: Swift detection of a burst
  28. Fermi423717114: iPTF optical transient candidates
  29. IPN Triangulation of GRB 140604A (short/hard)
  30. IPN Triangulation of GRB 140528A
  31. Swift detection of a bright X-ray source in M31
  32. Swift detection of SFXT IGR J17544-2619
  33. GRB 140523A: NOT observation
  34. GRB 140523A: Nanshan optical upper limit
  35. GRB 140423A: TShAO optical observations
  36. GRB 140516A: further Swift-XRT analysis
  37. GRB 140518A: Swift-XRT refined Analysis
  38. GRB 140518A: Swift detection of a burst
  39. GRB 140516A: 6 GHz upper limit
  40. GRB 140516A: Swift-XRT refined Analysis
  41. GRB 140515A: VLA Detection
  42. GRB 140515B: MAXI/GSC detection
  43. GRB 140515A: Gemini-North imaging
  44. Trigger 599041: Swift detection of SFXT IGR J16479-4514
  45. GRB 140423A: AAO optical upper limits
  46. GRB 140512A: Swift-XRT refined Analysis
  47. GRB 140509A: Swift-XRT refined Analysis
  48. GRB 140509A: Swift detection of a burst with an optical counterpart
  49. GRB 140508A: Fermi GBM detection
  50. GRB 140502A: ISON-NM early optical limit
  51. GRB 140506A: Swift-XRT refined Analysis
  52. GRB 140502A: Swift-XRT refined Analysis
  53. GRB 140430A: Swift-XRT refined Analysis
  54. GRB 140423A: RTT150 optical observations
  55. Trigger 597570: Swift detection of SGR 1806-20
  56. GRB 140423A: MITSuME Akeno upper limits
  57. GRB 140423A Third epoch pODI photometry
  58. GRB 140423A: MITSuME Akeno Optical observation
  59. DG CVn: optical observations
  60. GRB 140423A pODI/WIYN afterglow photometry
  61. GRB 140423A: Swift-XRT refined Analysis
  62. Swift Trigger 596958 is positionally consistent with V* DG CVn/2XMM J133146.4+291635
  63. Swift Trigger 596641 is not a GRB
  64. GRB 140419A: Swift-XRT refined Analysis
  65. GRB 140419A: Gemini-N redshift
  66. Konus-Wind observation of GRB 140416A
  67. GRB 140412A: Swift-XRT refined Analysis
  68. GRB 140412A: Swift detection of a burst
  69. GRB 140408A: Swift-XRT refined Analysis
  70. Swift Trigger 595162: a possible GRB
  71. GRB 140331A: Swift-XRT refined Analysis
  72. Konus-Wind observation of GRB 140330A
  73. GRB 140331A: MITSuME Okayama upper limits
  74. IPN Triangulation of GRB 140329A
  75. Konus-Wind observation of GRB 140323A
  76. GRB 140323A: Swift-XRT refined Analysis
  77. GRB 140323A: Swift detection of a burst
  78. GRB 140320C: Swift-XRT observations
  79. GRB 140320A: Fermi GBM detection
  80. GRB 140320B: Swift-XRT detection of the afterglow
  81. GRB 140318A: Swift-XRT refined Analysis
  82. GRB 140311A: further NOT observations
  83. GRB 140311A: Swift-XRT refined Analysis
  84. GRB 140311B: Swift-XRT refined Analysis
  85. GRB 140311A: Gemini-South redshift
  86. GRB 140305A: Swift detection of a burst
  87. GRB 140304A: Swift-XRT refined Analysis
  88. GRB 140304A: MASTER OT detecton
  89. GRB 140302A: Swift-XRT refined Analysis
  90. GRB 140301A: Swift-XRT refined Analysis
  91. GRB 140301A: Swift detection of a burst
  92. GRB 140215A: MITSuME Okayama Optical Observation
  93. GRB 140215A: Swift-XRT refined Analysis
  94. GRB 140213A: Swift-XRT refined Analysis
  95. Trigger 586482: Swift detection of GROJ1744-28
  96. GRB 140211A: MITSuME Okayama upper limits
  97. GRB 140206A: Swift-XRT refined Analysis
  98. GRB 140206A: T100 observations
  99. GRB 140129B: Swift-XRT refined Analysis
  100. GRB 140129A: Swift-XRT refined Analysis

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