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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"

27956 results found.

  1. GRB 130427A: Skynet detections of a possible supernova
  2. GRB 130515A: Swift-XRT refined Analysis
  3. GRB 130515A: Swift/UVOT Upper Limits
  4. GRB 130514B Swift-BAT observations
  5. GRB 130515A: Swift-BAT refined analysis
  6. GRB 130515A: Gemini/GMOS Observations
  7. GRB 130515A: GROND Observations
  8. GRB 130515A: Enhanced Swift-XRT position
  9. GRB 130511A: SSO 2.3m observation
  10. GRB 130514B: Swift-XRT Observations
  11. GRB 130515A: Swift detection of a short burst
  12. GRB 130514A: Swift-XRT refined Analysis
  13. GRB 130514A: Skynet/PROMPT/DSO Detections
  14. GRB 130513A: Bassano Bresciano optical upper limit
  15. GRB 130427A: Spectroscopic detection of the SN from the 10.4m GTC
  16. GRB 130427A: optical observations
  17. GRB 130514A: RATIR Optical and NIR Observations
  18. GRB 130513A: RATIR Optical and NIR Observations
  19. GRB 130513A: Swift/UVOT Upper Limits
  20. GRB 130514A: Swift/UVOT Upper Limits
  21. GRB 130514A: Enhanced Swift-XRT position
  22. GRB 130514A: Swift-BAT refined analysis
  23. GRB 130513A: Swift-XRT detection of the afterglow.
  24. GRB 130514A: GROND optical-NIR afterglow discovery and photo-z
  25. GRB 130514A: P60 Observations
  26. GRB 130514A: Swift detection of a burst
  27. GRB 130427A: Tautenburg 2nd epoch: No break, no clear SN
  28. GRB130508A: MASTER-Net optical observations
  29. GRB 130511A: Swift-XRT refined Analysis
  30. GRB 130511A, Swift-BAT refined analysis
  31. GRB 130511A: Enhanced Swift-XRT position
  32. GRB 130511A: Gemini-North Redshift
  33. GRB 130511A: Swift detection of a burst with an optical counterpart
  34. GRB 130508A: Swift/UVOT Upper Limits
  35. GRB 130427A: host galaxy observations
  36. GRB 130508A: RATIR Optical and NIR Observations
  37. GRB 130508A: Refined Swift-XRT analysis: Correction to GCN 14612
  38. GRB 130508A, Swift-BAT refined analysis
  39. Fermi Trigger 130507.091 - Detection of a SGR-like Burst
  40. GRB130508A: BOOTES-3 optical limit
  41. GRB 130427A: Ten nights of Skynet/PROMPT/GORT observations
  42. GRB 130508A: Swift detection of a probable burst
  43. GRB 130427A, LBT optical spectrum
  44. GRB 130505B: Further Swift observations
  45. GRB 130504C: Swift-XRT afterglow confirmation
  46. GRB 130504C: Suzaku WAM observation of the prompt emission
  47. GRB 130504B: Suzaku WAM observation of the prompt emission
  48. GRB 130505A: Suzaku WAM observation of the prompt emission
  49. GRB 130427A, Watcher afterglow detection
  50. GRB 130505B: Swift Candidate Afterglow
  51. Refined IPN Triangulation of GRB 130502B
  52. GRB 130505A, Swift-BAT refined analysis
  53. GRB 130504C: further Swift-XRT observations
  54. Konus-Wind observation of GRB 130504C
  55. GRB 130505B: MAXI/GSC detection
  56. GRB 130505A: optical observations
  57. GRB 130504C: Swift-XRT observations
  58. GRB 130504C: Fermi GBM detection
  59. GRB 130427A: optical observations in CrAO
  60. GRB 130502A: optical upper limit
  61. GRB 130505A: Swift-XRT refined Analysis
  62. GRB 130505A: Largest E_iso ever measured
  63. Konus-Wind observation of GRB 130505A
  64. GRB 130504C: Fermi-LAT detection of a burst
  65. Swift/UVOT observations of GRB130505A
  66. GRB 130505A: Enhanced Swift-XRT position
  67. GRB 130505A: MAXI/GSC detection
  68. Konus-Wind observation of GRB 130504B
  69. GRB 130505A: Swift detection of a burst with optical afterglow
  70. IPN Triangulation of GRB 130504B
  71. GRB 130504B: Fermi GBM detection
  72. GRB 130504A: Bassano Bresciano Observatory optical upper limit
  73. GRB 130504A: Enhanced XRT position
  74. GRB 130502B: Suzaku WAM observation of the prompt emission
  75. GRB 130504A: Swift/UVOT Upper Limits
  76. GRB 130502B: Swift-XRT refined Analysis
  77. GRB 130504A, Swift-BAT refined analysis
  78. Swift-XRT X-ray afterglow candidate for GRB 130504A (BAT trigger 555096)
  79. Trigger 555096: Swift detection of a possible burst
  80. GRB 130502A: Swift-BAT refined analysis
  81. GRB 130427A: Non-observation of VHE emission with HAWC
  82. GRB130502A: MASTER-Net optical observations
  83. GRB 130502A: Swift-XRT refined Analysis
  84. IPN Triangulation of GRB 130502B
  85. GRB 130502A: Fermi GBM detection
  86. GRB 130502B: Swift/UVOT Upper Limits
  87. GRB 130502A: Swift/UVOT Upper Limits
  88. Konus-Wind observation of GRB 130502B
  89. GRB 130502B Swift-XRT observations
  90. GRB 130502A: RATIR Optical and NIR Observations
  91. GRB 130502A: Enhanced Swift-XRT position
  92. GRB 130502B: Fermi LAT Detection
  93. GRB 130502B: Fermi GBM detection of a burst
  94. GRB 130502A: T100 Observations
  95. GRB 130502A: Swift detection of a burst
  96. GRB 130427A: Predictions about the occurrence of a supernova
  97. GRB 130425A: Suzaku WAM observation of the prompt emission
  98. GRB 130427A: VLA 20 GHz detection
  99. GRB 130427A: High-energy neutrino search
  100. GRB 130427A: GMRT radio detection

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