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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"

27829 results found.

  1. GRB 120118B: Swift/UVOT Upper Limits
  2. GRB 120119A: Liverpool Telescope afterglow detection
  3. GRB 120119A: PAIRITEL NIR Detection
  4. GRB 120119A: Swift detection of a burst with an optical counterpart
  5. GRB 120118B: NOT observations
  6. GRB 120118B: Enhanced Swift-XRT position
  7. GRB 120118B: Faulkes Telescope South observations
  8. GRB 120118B: Swift-XRT position
  9. GRB 120118B: MASTER optical observations
  10. GRB 120118B: Swift detection of a burst
  11. GRB 120116A: Swift/UVOT Upper Limits
  12. GRB 120116A: Swift-XRT refined Analysis
  13. GRB 120116A: Enhanced Swift-XRT position
  14. AXP 4U 1042+61: Mondy optical observations
  15. GRB 120116A: Mondy optical observations
  16. GRB 120116A: EVLA observations
  17. GRB 120116A: Optical observations at Crni Vrh
  18. GRB 120116A: Swift-BAT refined analysis
  19. GRB 120116A: NOT observations
  20. GRB 120116A: Bassano Bresciano Observatory optical observations
  21. GRB 120116A: MASTER Early optical limit
  22. GRB 120116A: Swift detection of a burst
  23. GRB 120114A found in ground analysis of BAT data
  24. AXP 4U 0142+61: Swift-BAT refined analysis (trigger 511611)
  25. GRB 120106A: optical upper limit
  26. Swift detection of an SGR burst from AXP 4U 0142+61
  27. GRB 120107A: Suzaku WAM observation of the prompt emission
  28. Konus-Wind observation of GRB 120107A
  29. IPN Triangulation of GRB 120107A
  30. GRB 120106A: Swift/UVOT Upper Limits
  31. GRB 120106A: Bassano Bresciano Observatory optical observations
  32. GRB 120106A: MASTER Early OT marginally detection
  33. GRB 120106A: Swift-XRT refined Analysis
  34. GRB 120106A: Swift-BAT refined analysis
  35. GRB 120106A: Enhanced Swift-XRT position
  36. GRB 120106A: TAROT Calern observatory optical observations
  37. GRB 120106A: MASTER-Tunka optical observations
  38. GRB 120106A: Swift detection of a burst
  39. GRB 111222A: Second Swift observation
  40. GRB111209A: ATCA detection at 5.5, 9, and 18GHz
  41. GRB111225A: RAPTOR Early Detection of the Optical Counterpart
  42. GRB 111211A: Detection of the SN with the 10.4m GTC
  43. GRB 120102A: Fermi GBM observation
  44. Konus-Wind observation of GRB 120102A
  45. GRB 120102A: Swift-BAT refined analysis
  46. GRB 120102A: Swift-XRT refined Analysis
  47. GRB 120102A: Swift/UVOT Detection
  48. GRB 120102A: Enhanced Swift-XRT position
  49. GRB 120102A: Swift detection of a burst with an optical counterpart
  50. GRB 111228A, optical observations
  51. Konus-Wind observation of GRB 111228A
  52. GRB 111229A: Swift/UVOT Detection
  53. GRB 111229A: Faulkes Telescope South observations
  54. GRB 111229A: Swift-XRT refined Analysis
  55. GRB 111229A: Enhanced Swift-XRT position
  56. GRB 111229A: Swift-BAT refined analysis
  57. GRB 111229A: Swift detection of a burst
  58. GRB 111225A: Lightbuckets Optical Observations
  59. GRB 111228A: P60 Observations
  60. GRB 111228A: T100 observations
  61. GRB 111228A: Swift-XRT refined Analysis
  62. GRB 111228A: PAIRITEL NIR Detection
  63. GRB 111228A: TAROT La Silla observatory observations
  64. GRB 111228A: MASTER OT observations
  65. GRB 111228A: Swift/UVOT Detection
  66. GRB 111228A, Swift-BAT refined analysis
  67. GRB 111228A: Enhanced Swift-XRT position
  68. GRB 111228A: TAROT Calern observatory. OT decay stopped
  69. GRB 111228A: Fermi GBM observation
  70. GRB 111228A: TAROT Calern observatory. OT seems still bright
  71. GRB 111228A: Swift detection of a burst with an optical counterpart
  72. GRB 111225A: Swift/UVOT Observations
  73. GRB 111215A: Keck/LRIS Imaging
  74. GRB 111225A: Keck/LRIS Afterglow Photometry
  75. GRB 111225A: PAIRITEL NIR Upper Limits
  76. GRB 111225A: GRT Optical Observation
  77. GRB 111225A: Swift-XRT refined Analysis
  78. GRB 111225A, Swift-BAT refined analysis
  79. GRB 111225A: Enhanced Swift-XRT position
  80. GRB 111225A: Super-LOTIS early detection
  81. GRB 111225A: TAROT Calern observatory optical detection
  82. GRB 111225A: TAROT Calern observatory optical observations
  83. GRB 111225A: Swift detection of a burst with an optical counterpart
  84. GRB 111222A: Swift/UVOT Observations
  85. GRB 111222A: Swift-XRT observations
  86. IPN Triangulation of GRB 111222A (short/hard/intense)
  87. Trigger 510075 is not a GRB
  88. GRB 111215A: EVLA observations
  89. GRB111215A: CARMA Detection
  90. XRT GRB Catalogue now live and online
  91. GRB 111103B: optical upper limit
  92. GRB 110820A: optical observations in Maidanak observatory
  93. GRB 111103A: optical upper limit of Mt. Terskol observatory
  94. GRB 111215B: Suzaku WAM observation of the prompt emission
  95. GRB111215A: optical upper limit
  96. GRB 111215B: Swift/UVOT Upper Limits
  97. GRB 111215B: Swift-XRT observations
  98. GRB 111205A: Confirmation of X-ray Afterglow
  99. IPN Triangulation of GRB 111215B (long/intense)
  100. GRB 111215A: TNG K-band observations

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