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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"

19662 results found.

  1. GRB 120118B: optical upper limit
  2. GRB 120116A: optical upper limit
  3. GRB 120119A: EVLA observations
  4. GRB 120119A: GRT detection of early afterglow
  5. GRB 120119A: optical upper limit
  6. GRB 120121A: Swift/UVOT Upper Limits
  7. GRB 120121A: Swift-XRT refined Analysis
  8. GRB 120121A: Swift-BAT refined analysis
  9. GRB 120121A: Enhanced Swift-XRT position
  10. GRB 120121A: ISON-NM optical observations
  11. GRB 120121A: Swift-XRT position
  12. GRB 120121A: Swift detection of a burst
  13. GRB 120119A, Swift-BAT refined analysis
  14. GRB 120119A: TAROT La Silla observatory optical observations
  15. GRB 120119A: optical observations
  16. GRB 120119A: Swift/UVOT Observations
  17. GRB 120119A: Swift-XRT refined Analysis
  18. GRB 120119A: Enhanced Swift-XRT position
  19. GRB 120119A: Fermi GBM observation
  20. GRB 120118B, Swift-BAT refined analysis
  21. Konus-Wind observation of GRB 120119A
  22. GRB 120119A: optical observations
  23. GRB 120118B: Swift-XRT refined Analysis
  24. GRB 120118B : Lulin Optical limit
  25. GRB 120119A: GROND Detection of the Optical/NIR Afterglow
  26. GRB 120118B: Swift/UVOT Upper Limits
  27. GRB 120119A: Liverpool Telescope afterglow detection
  28. GRB 120119A: PAIRITEL NIR Detection
  29. GRB 120119A: Swift detection of a burst with an optical counterpart
  30. GRB 120118B: NOT observations
  31. GRB 120118B: Enhanced Swift-XRT position
  32. GRB 120118B: Faulkes Telescope South observations
  33. GRB 120118B: Swift-XRT position
  34. GRB 120118B: MASTER optical observations
  35. GRB 120118B: Swift detection of a burst
  36. GRB 120116A: Swift/UVOT Upper Limits
  37. GRB 120116A: Swift-XRT refined Analysis
  38. GRB 120116A: Enhanced Swift-XRT position
  39. AXP 4U 1042+61: Mondy optical observations
  40. GRB 120116A: Mondy optical observations
  41. GRB 120116A: EVLA observations
  42. GRB 120116A: Optical observations at Crni Vrh
  43. GRB 120116A: Swift-BAT refined analysis
  44. GRB 120116A: NOT observations
  45. GRB 120116A: Bassano Bresciano Observatory optical observations
  46. GRB 120116A: MASTER Early optical limit
  47. GRB 120116A: Swift detection of a burst
  48. GRB 120114A found in ground analysis of BAT data
  49. AXP 4U 0142+61: Swift-BAT refined analysis (trigger 511611)
  50. GRB 120106A: optical upper limit
  51. Swift detection of an SGR burst from AXP 4U 0142+61
  52. IPN Triangulation of GRB 120107A
  53. GRB 120106A: Swift/UVOT Upper Limits
  54. GRB 120106A: Bassano Bresciano Observatory optical observations
  55. GRB 120106A: MASTER Early OT marginally detection
  56. GRB 120106A: Swift-XRT refined Analysis
  57. GRB 120106A: Swift-BAT refined analysis
  58. GRB 120106A: Enhanced Swift-XRT position
  59. GRB 120106A: TAROT Calern observatory optical observations
  60. GRB 120106A: MASTER-Tunka optical observations
  61. GRB 120106A: Swift detection of a burst
  62. GRB 111222A: Second Swift observation
  63. GRB111225A: RAPTOR Early Detection of the Optical Counterpart
  64. GRB 120102A: Fermi GBM observation
  65. Konus-Wind observation of GRB 120102A
  66. GRB 120102A: Swift-BAT refined analysis
  67. GRB 120102A: Swift-XRT refined Analysis
  68. GRB 120102A: Swift/UVOT Detection
  69. GRB 120102A: Enhanced Swift-XRT position
  70. GRB 120102A: Swift detection of a burst with an optical counterpart
  71. GRB 111228A, optical observations
  72. Konus-Wind observation of GRB 111228A
  73. GRB 111229A: Swift/UVOT Detection
  74. GRB 111229A: Faulkes Telescope South observations
  75. GRB 111229A: Swift-XRT refined Analysis
  76. GRB 111229A: Enhanced Swift-XRT position
  77. GRB 111229A: Swift-BAT refined analysis
  78. GRB 111229A: Swift detection of a burst
  79. GRB 111225A: Lightbuckets Optical Observations
  80. GRB 111228A: P60 Observations
  81. GRB 111228A: T100 observations
  82. GRB 111228A: Swift-XRT refined Analysis
  83. GRB 111228A: PAIRITEL NIR Detection
  84. GRB 111228A: TAROT La Silla observatory observations
  85. GRB 111228A: MASTER OT observations
  86. GRB 111228A: Swift/UVOT Detection
  87. GRB 111228A, Swift-BAT refined analysis
  88. GRB 111228A: Enhanced Swift-XRT position
  89. GRB 111228A: TAROT Calern observatory. OT decay stopped
  90. GRB 111228A: Fermi GBM observation
  91. GRB 111228A: TAROT Calern observatory. OT seems still bright
  92. GRB 111228A: Swift detection of a burst with an optical counterpart
  93. GRB 111225A: Swift/UVOT Observations
  94. GRB 111215A: Keck/LRIS Imaging
  95. GRB 111225A: Keck/LRIS Afterglow Photometry
  96. GRB 111225A: PAIRITEL NIR Upper Limits
  97. GRB 111225A: GRT Optical Observation
  98. GRB 111225A: Swift-XRT refined Analysis
  99. GRB 111225A, Swift-BAT refined analysis
  100. GRB 111225A: Enhanced Swift-XRT position

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