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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"

19607 results found.

  1. Konus-Wind observation of GRB 130518A
  2. GRB 130518A Swift-BAT position from ground analysis
  3. GRB 130518A: Fermi LAT detection
  4. GRB 130515A: Further Gemini Observations
  5. Konus-Wind observation of GRB 130515A
  6. GRB 130514B: RATIR Optical and NIR Observations
  7. GRB 130515A: Fermi GBM detection
  8. GRB 130427A: Skynet detections of a possible supernova
  9. GRB 130515A: Swift-XRT refined Analysis
  10. GRB 130515A: Swift/UVOT Upper Limits
  11. GRB 130514B Swift-BAT observations
  12. GRB 130515A: Swift-BAT refined analysis
  13. GRB 130515A: Gemini/GMOS Observations
  14. GRB 130515A: GROND Observations
  15. GRB 130515A: Enhanced Swift-XRT position
  16. GRB 130511A: SSO 2.3m observation
  17. GRB 130514B: Swift-XRT Observations
  18. GRB 130515A: Swift detection of a short burst
  19. GRB 130514A: Swift-XRT refined Analysis
  20. GRB 130514A: Skynet/PROMPT/DSO Detections
  21. GRB 130513A: Bassano Bresciano optical upper limit
  22. GRB 130427A: optical observations
  23. GRB 130514A: RATIR Optical and NIR Observations
  24. GRB 130513A: RATIR Optical and NIR Observations
  25. GRB 130513A: Swift/UVOT Upper Limits
  26. GRB 130514A: Swift/UVOT Upper Limits
  27. GRB 130514A: Enhanced Swift-XRT position
  28. GRB 130514A: Swift-BAT refined analysis
  29. GRB 130513A: Swift-XRT detection of the afterglow.
  30. GRB 130514A: GROND optical-NIR afterglow discovery and photo-z
  31. GRB 130514A: Swift detection of a burst
  32. GRB130508A: MASTER-Net optical observations
  33. GRB 130511A: Swift-XRT refined Analysis
  34. GRB 130511A, Swift-BAT refined analysis
  35. GRB 130511A: Enhanced Swift-XRT position
  36. GRB 130511A: Gemini-North Redshift
  37. GRB 130511A: Swift detection of a burst with an optical counterpart
  38. GRB 130508A: Swift/UVOT Upper Limits
  39. GRB 130508A: RATIR Optical and NIR Observations
  40. GRB 130508A: Refined Swift-XRT analysis: Correction to GCN 14612
  41. GRB 130508A, Swift-BAT refined analysis
  42. GRB130508A: BOOTES-3 optical limit
  43. GRB 130427A: Ten nights of Skynet/PROMPT/GORT observations
  44. GRB 130508A: Swift detection of a probable burst
  45. GRB 130505B: Further Swift observations
  46. GRB 130504C: Swift-XRT afterglow confirmation
  47. GRB 130504C: Suzaku WAM observation of the prompt emission
  48. GRB 130504B: Suzaku WAM observation of the prompt emission
  49. GRB 130505A: Suzaku WAM observation of the prompt emission
  50. GRB 130427A, Watcher afterglow detection
  51. GRB 130505B: Swift Candidate Afterglow
  52. Refined IPN Triangulation of GRB 130502B
  53. GRB 130505A, Swift-BAT refined analysis
  54. GRB 130504C: further Swift-XRT observations
  55. GRB 130505A: optical observations
  56. GRB 130504C: Swift-XRT observations
  57. GRB 130427A: optical observations in CrAO
  58. GRB 130502A: optical upper limit
  59. GRB 130505A: Swift-XRT refined Analysis
  60. GRB 130505A: Largest E_iso ever measured
  61. Konus-Wind observation of GRB 130505A
  62. GRB 130504C: Fermi-LAT detection of a burst
  63. Swift/UVOT observations of GRB130505A
  64. GRB 130505A: Enhanced Swift-XRT position
  65. GRB 130505A: MAXI/GSC detection
  66. GRB 130505A: Swift detection of a burst with optical afterglow
  67. IPN Triangulation of GRB 130504B
  68. GRB 130504A: Bassano Bresciano Observatory optical upper limit
  69. GRB 130504A: Enhanced XRT position
  70. GRB 130502B: Suzaku WAM observation of the prompt emission
  71. GRB 130504A: Swift/UVOT Upper Limits
  72. GRB 130502B: Swift-XRT refined Analysis
  73. GRB 130504A, Swift-BAT refined analysis
  74. Swift-XRT X-ray afterglow candidate for GRB 130504A (BAT trigger 555096)
  75. Trigger 555096: Swift detection of a possible burst
  76. GRB 130502A: Swift-BAT refined analysis
  77. GRB130502A: MASTER-Net optical observations
  78. GRB 130502A: Swift-XRT refined Analysis
  79. IPN Triangulation of GRB 130502B
  80. GRB 130502A: Fermi GBM detection
  81. GRB 130502B: Swift/UVOT Upper Limits
  82. GRB 130502A: Swift/UVOT Upper Limits
  83. GRB 130502B Swift-XRT observations
  84. GRB 130502A: RATIR Optical and NIR Observations
  85. GRB 130502A: Enhanced Swift-XRT position
  86. GRB 130502B: Fermi LAT Detection
  87. GRB 130502A: T100 Observations
  88. GRB 130502A: Swift detection of a burst
  89. GRB 130427A: Predictions about the occurrence of a supernova
  90. GRB 130427A: High-energy neutrino search
  91. Swift-BAT trigger 554135 is noise
  92. GRB 130427A: Challis Observatory optical observations
  93. GRB 130427A: Continued Skynet/PROMPT Observations
  94. GRB 130427A: Fermi-LAT refined analysis
  95. GRB 130418A: Bassano Bresciano Observatory lightcurve analisis
  96. GRB 130427A: Improved Swift-XRT analysis
  97. GRB 100728A: GROND host detection and X-shooter redshift
  98. GRB 130427A: Skynet/PROMPT Observations
  99. GRB 130427B: RATIR Optical and NIR Observations
  100. GRB 130427A, Optical Observations

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