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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"

26380 results found.

  1. Konus-Wind observation of GRB 111228A
  2. GRB 111228A: SMARTS optical/IR afterglow observations
  3. GRB 111229A: Swift-XRT refined Analysis
  4. GRB 111229A: Enhanced Swift-XRT position
  5. GRB 111228A: Continued Skynet PROMPT/Dolomiti Optical Observations
  6. GRB111228A: Further GMG observations
  7. GRB 111229A: Gemini-South Redshift
  8. GRB 111229A: Swift-BAT refined analysis
  9. GRB 111229A: Swift detection of a burst
  10. GRB 111228A: X-shooter spectroscopy
  11. GRB 111228A: T100 observations
  12. GRB 111228A: GMG optical observation
  13. GRB 111228A: Swift-XRT refined Analysis
  14. GRB111228A: TNG spectroscopy analysis
  15. GRB 111228A: TAROT La Silla observatory observations
  16. GRB 111228A: Skynet/Dolomiti Optical Observations
  17. GRB 111228A: NOT optical observation
  18. GRB 111228A, Swift-BAT refined analysis
  19. GRB 111228A: optical observations
  20. GRB 111228A: Enhanced Swift-XRT position
  21. GRB 111228A: TAROT Calern observatory. OT decay stopped
  22. GRB 111228A, optical observations
  23. GRB 111228A: Fermi GBM observation
  24. GRB 111228A: TAROT Calern observatory. OT seems still bright
  25. GRB 111225A, optical observations
  26. XMM-Newton observation of the short GRB 111020A
  27. GRB 111228A: Swift detection of a burst with an optical counterpart
  28. GRB 111205A: optical observations
  29. GRB 111222A : Suzaku WAM observation of the prompt emission
  30. GRB 111225A: GRT Optical Observation
  31. GRB 111225A: Swift-XRT refined Analysis
  32. GRB 111225A, Swift-BAT refined analysis
  33. GRB 111225A: Enhanced Swift-XRT position
  34. GRB 111225A: TAROT Calern observatory optical detection
  35. GRB 111225A: TAROT Calern observatory optical observations
  36. GRB 111225A: Swift detection of a burst with an optical counterpart
  37. GRB 111222A: Xinglong TNT observation
  38. Konus-Wind observation of GRB 111222A
  39. IPN Triangulation of GRB 111222A (short/hard/intense)
  40. Trigger 510075 is not a GRB
  41. GRB 111215A: EVLA observations
  42. XRT GRB Catalogue now live and online
  43. GRB 110820A: optical observations in Maidanak observatory
  44. GRB 111215B: Suzaku WAM observation of the prompt emission
  45. Konus-Wind observation of GRB 111215B
  46. GRB 111205A: Confirmation of X-ray Afterglow
  47. IPN Triangulation of GRB 111215B (long/intense)
  48. GRB 111215A: WHT, LT and NOT imaging
  49. GRB 111215A: Swift-XRT refined Analysis
  50. Possible detection of pre-trigger X-ray emission from GRB 111215A by MAXI/GSC
  51. GRB 111215A: Enhanced Swift-XRT position
  52. GRB 111215A: Swift-BAT refined analysis
  53. GRB 111215A, Optical Observations
  54. GRB 111209A: RAPTOR Limits Before and During the Gamma-ray Emitting Interval
  55. GRB 111215A: Swift detection of a burst
  56. GRB 111211A: Swift/UVOT Detection
  57. Konus-Wind observation of GRB 111211A
  58. GRB 111212A: Swift-XRT refined Analysis
  59. GRB 111211A: Swift/XRT target of opportunity observation
  60. GRB 111212A: Swift-BAT refined analysis
  61. GRB 111212A: Enhanced Swift-XRT position
  62. GRB 111212A: Swift detection of a burst
  63. Konus-Wind observation of GRB 111209A
  64. GRB 111210A: Swift-XRT refined Analysis
  65. GRB 111209A: Rebrightening seen by GROND
  66. GRB 111210A: Enhanced Swift-XRT position
  67. GRB 111210A: Swift-BAT refined analysis
  68. GRB 111210A: Swift detection of a burst
  69. GRB 111209A: IRTF NIR Imaging/Spectroscopy
  70. GRB 111209A optical limit by "Pi of the Sky"
  71. GRB 111209A: PROMPT optical observations of early afterglow
  72. GRB 111209A: Swift-XRT refined Analysis
  73. GRB 111209A: Swift UVOT refined analysis
  74. GRB 111209A: Swift Burst of Interest
  75. GRB 111209A, Swift-BAT refined analysis
  76. GRB 111209A: Enhanced Swift-XRT position
  77. GRB 111209A: TAROT La Silla observatory optical light curve analysis
  78. GRB 111205A: GROND observations
  79. GRB 111209A: Faulkes Telescope North observations
  80. GRB 111209A: REM NIR detection
  81. GRB 111209A: TAROT La Silla observatory optical detection
  82. GRB 111209A: Swift detection of a long burst with an optical counterpart
  83. GRB 111208A found in ground analysis of BAT data
  84. Konus-Wind observation of GRB 111205A
  85. IPN Triangulation of GRB 111205A (long/hard/intense)
  86. GRB 111117A: Refined GMG observation
  87. GRB 111204A: Swift-XRT refined Analysis
  88. GRB 111204A, Swift-BAT refined analysis
  89. GRB 110921A: optical observations in Maidanak observatory
  90. GRB 111204A: Enhanced Swift-XRT position
  91. GRB 111204A: Swift detection of a burst
  92. GRB 111201A found in ground analysis of BAT data
  93. GRB 111121A: Suzaku WAM observation of the prompt emission
  94. GRB 111129A: Swift/UVOT Detection
  95. GRB 111129A, GROND afterglow observations
  96. GRB 111129A: Swift-XRT refined Analysis
  97. GRB 111129A: Swift-BAT refined analysis
  98. GRB 111129A: Enhanced Swift-XRT position
  99. GRB 111129A: Swift detection of a burst with an optical counterpart
  100. GRB 111126A found in ground analysis of BAT data

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