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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"

19666 results found.

  1. GRB 111225A: GRT Optical Observation
  2. GRB 111225A: Swift-XRT refined Analysis
  3. GRB 111225A, Swift-BAT refined analysis
  4. GRB 111225A: Enhanced Swift-XRT position
  5. GRB 111225A: TAROT Calern observatory optical detection
  6. GRB 111225A: TAROT Calern observatory optical observations
  7. GRB 111225A: Swift detection of a burst with an optical counterpart
  8. GRB 111222A: Swift/UVOT Observations
  9. GRB 111222A: Swift-XRT observations
  10. IPN Triangulation of GRB 111222A (short/hard/intense)
  11. Trigger 510075 is not a GRB
  12. GRB 111215A: EVLA observations
  13. GRB111215A: CARMA Detection
  14. XRT GRB Catalogue now live and online
  15. GRB 111103B: optical upper limit
  16. GRB 110820A: optical observations in Maidanak observatory
  17. GRB 111103A: optical upper limit of Mt. Terskol observatory
  18. GRB 111215B: Suzaku WAM observation of the prompt emission
  19. GRB111215A: optical upper limit
  20. GRB 111215B: Swift/UVOT Upper Limits
  21. GRB 111215B: Swift-XRT observations
  22. GRB 111205A: Confirmation of X-ray Afterglow
  23. IPN Triangulation of GRB 111215B (long/intense)
  24. GRB 111215A: Swift/UVOT Upper Limits
  25. GRB 111215A: Swift-XRT refined Analysis
  26. Possible detection of pre-trigger X-ray emission from GRB 111215A by MAXI/GSC
  27. GRB 111215A: Enhanced Swift-XRT position
  28. GRB 111215A: Swift-BAT refined analysis
  29. GRB 111215A: MASTER-Net optical prompt and follow up observations
  30. GRB 111215A, Optical Observations
  31. GRB 111209A: RAPTOR Limits Before and During the Gamma-ray Emitting Interval
  32. GRB 111215A: Swift detection of a burst
  33. GRB 111212A: GROND observations
  34. GRB 111211A: Swift/UVOT Detection
  35. GRB 111212A: Swift-XRT refined Analysis
  36. GRB 111211A: Swift/XRT target of opportunity observation
  37. GRB 111212A: Swift/UVOT Upper Limits
  38. GRB 111212A: Swift-BAT refined analysis
  39. GRB 111212A: Enhanced Swift-XRT position
  40. GRB 111212A: Swift-XRT observations
  41. GRB 111212A: Swift detection of a burst
  42. Konus-Wind observation of GRB 111209A
  43. GRB 111210A: GROND observations
  44. GRB 111210A: Swift-XRT refined Analysis
  45. GRB 111208A: Swift-XRT refined analysis
  46. GRB 111210A: Swift/UVOT Upper Limits
  47. GRB 111210A: Enhanced Swift-XRT position
  48. GRB 111210A: Swift-BAT refined analysis
  49. GRB 111210A: Swift detection of a burst
  50. GRB 111209A: VLT/X-shooter redshift
  51. GRB 111209A: GROND Afterglow observations
  52. GRB 111209A optical limit by "Pi of the Sky"
  53. GRB 111208A: Lightbuckets Optical Observations
  54. GRB 111209A: Swift-XRT refined Analysis
  55. GRB 111209A: Swift UVOT refined analysis
  56. GRB 111209A: Swift Burst of Interest
  57. GRB 111209A, Swift-BAT refined analysis
  58. GRB 111209A: Enhanced Swift-XRT position
  59. GRB 111209A: TAROT La Silla observatory optical light curve analysis
  60. GRB 111209A: Faulkes Telescope North observations
  61. GRB 111209A: REM NIR detection
  62. GRB 111209A: TAROT La Silla observatory optical detection
  63. GRB 111209A: Swift detection of a long burst with an optical counterpart
  64. GRB 111208A: Swift XRT/UVOT observations
  65. GRB 111205A: Swift XRT Observations
  66. GRB 111207A found in ground analysis of BAT data
  67. GRB 111208A found in ground analysis of BAT data
  68. IPN Triangulation of GRB 111205A (long/hard/intense)
  69. GRB 111204A: GROND Observations
  70. GRB 111204A: Swift-XRT refined Analysis
  71. GRB 111204A, Swift-BAT refined analysis
  72. GRB 111022B: CrAO optical limit
  73. GRB 111204A: Swift/UVOT Upper Limits
  74. GRB 110921A: optical observations in Maidanak observatory
  75. GRB 111204A: MASTER optical observations
  76. GRB 111123A: optical upper limit in CrAO: correction to the GCN circ. 12613
  77. GRB 111204A: Enhanced Swift-XRT position
  78. GRB 111123A: optical upper limit in CrAO
  79. GRB 111204A: Swift detection of a burst
  80. GRB 111201A: Confirmation of the X-ray afterglow
  81. GRB 111201A: Swift/UVOT Upper Limits
  82. GRB111201A: Swift-XRT observations
  83. GRB 111201A found in ground analysis of BAT data
  84. GRB 111121A: Suzaku WAM observation of the prompt emission
  85. GRB 111129A: Swift/UVOT Detection
  86. GRB 111129A: Swift-XRT refined Analysis
  87. GRB 111126A Circular #12599 erratum
  88. GRB 111129A: Swift-BAT refined analysis
  89. GRB 111129A: Enhanced Swift-XRT position
  90. GRB 111129A: Swift detection of a burst with an optical counterpart
  91. GRB 111126A found in ground analysis of BAT data
  92. GRB 111123A, Swift-BAT refined analysis
  93. GRB 111123A: Swift/UVOT Upper Limits
  94. GRB 111123A: Swift-XRT refined Analysis
  95. GRB 111123A: Enhanced Swift-XRT position
  96. GRB 111123A: Swift detection of a burst
  97. Konus-Wind observation of GRB 111121A
  98. GRB 111121A: Swift/UVOT Upper Limits
  99. GRB 111121A: Swift-XRT refined Analysis
  100. GRB 111121A: Swift-BAT refined analysis

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