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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"

32763 results found.

  1. Konus-Wind observation of GRB 110903A
  2. GRB 110820A: optical upper limit
  3. GRB110825A: Fermi GBM observation
  4. SGR Swift J1834.9-0846: Swift-BAT refined analysis of trigger 501752
  5. Swift detection of an SGR burst from Swift J1834.9-0846
  6. GRB 110825A: Suzaku WAM observation of the prompt emission
  7. GRB 110825A: GMG optical observation
  8. GRB110825A: ROTSE early time optical limit
  9. GRB 110827A, Swift-BAT refined analysis
  10. GRB 110825A: optical afterglow candidate
  11. GRB 110825A: field inspection and possible host galaxy
  12. GRB110825A: Swift target of opportunity observation
  13. IPN triangulation of GRB110825A (very intense, long-duration)
  14. GRB 110820A, the review of the sky area in plate archives
  15. Swift J1834.9-0846: Precise X-ray Position and the Confirmation of its Spin Period
  16. Konus-Wind observation of GRB 110820B
  17. IPN triangulation of GRB 110820B (very long duration, extremely intense)
  18. GRB 110820A: Swift/UVOT Upper Limits
  19. GRB 110820A: Position udpate + 2nd epoch data
  20. GRB 110820A: i-band finding chart + correction to 12295
  21. GRB 110820A: CQUEAN izY Observation
  22. GRB 110820A: Swift-XRT refined Analysis
  23. GRB 110820A: Swift-BAT refined analysis
  24. GRB 110820A: CrAO optical upper limit
  25. GRB 110818A: Fermi GBM observation
  26. GRB 110818A: Swift/UVOT Upper Limits
  27. GRB 110818A: Optical afterglow and redshift from VLT/X-shooter
  28. GRB 110818A: Swift-XRT refined Analysis
  29. GRB 110815A: Swift-XRT and UVOT refined Analysis
  30. GRB 110818A, Swift-BAT refined analysis
  31. Konus-Wind observation of GRB 110815A
  32. IPN triangulation of GRB110815A (long, intense)
  33. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  34. GRB 110801A: optical observations at Mt. Terskol observatory
  35. Reprocessed enhanced Swift-XRT positions and GRB products: update
  36. SGR 1834.9-0846/ GRB 110807A, I-band observations
  37. Konus-Wind observation of GRB 110808B
  38. Konus-Wind observation of GRB 110808A
  39. IPN triangulation of GRB 110808B (short/hard/intense)
  40. RXTE Discovery of the Spin Period of Swift J1834.9-0846
  41. SGR 1834.9-0846/ GRB 110807A: archival IR observations
  42. GRB 110808A: Swift/UVOT Detection
  43. GRB 110808A: Swift-BAT refined analysis
  44. GRB 110808A: Swift-XRT refined Analysis
  45. SGR J1834.9-0846: A Neutron Star in W41?
  46. Swift SGR 1834.9-0846: Swift-BAT refined analysis
  47. GRB 110808A: VLT/X-shooter spectroscopy
  48. Fermi GBM detection of a SGR-like burst
  49. GRB 110807A: SAO RAS observations
  50. GRB 110726A: two epochs of SAO RAS optical observations
  51. Konus-Wind observation of GRB 110802A
  52. IPN triangulation of GRB110802A (short/hard burst)
  53. GRB 110801A: optical observations in CrAO
  54. EVLA observation for Fermi burst GRB 110721A
  55. GRB 110731A : Suzaku WAM observation of the prompt emission
  56. GRB 110726A: Swift-XRT refined Analysis
  57. GRB110731A: MOA optical observations of the steeply fading afterglow
  58. GRB 110801A: SAO RAS optical observations
  59. GRB 110801A: Evidence for a jet break
  60. GRB 110801A: MASTER OT observations
  61. GRB 110801A: Swift-BAT refined analysis
  62. Swift/UVOT observations of GRB110801A
  63. GRB 110801A: Swift-XRT refined Analysis
  64. GRB 110801A: TLS Optical afterglow confirmation
  65. GRB 110801A: ROTSE-III Detection of re-brightening from OT
  66. GRB 110731A / EVLA upper limits
  67. GRB 110731A: Swift-XRT refined Analysis
  68. Konus-Wind observation of GRB 110731A
  69. GRB110731A: Swift/UVOT Observations
  70. GRB 110731A: Fermi GBM observation
  71. GRB 110731A: NOT photometry
  72. Fermi-LAT Detection of GRB110731A
  73. GRB 110731A: Swift-BAT refined analysis
  74. GRB 110731A: FTN+FTS afterglow observations
  75. GRB 110721A: Swift observations of afterglow candidate
  76. AXP 4U 0142+61: Swift-BAT refined analysis
  77. GRB 110726A: optical upper limit in CrAO
  78. Swift triggers 458268 and 458269 are not astrophysical
  79. GRB 110726A: EVLA observations
  80. GRB 110726A: ROTSE-III refined analysis, fast decay in early phase
  81. GRB110726A: MITSuME Ishigakijima Optical Observation
  82. GRB 110726A: Further Swift/UVOT Observations
  83. GRB 110726A: Swift-BAT refined analysis
  84. GRB 110726A: Swift/UVOT Detection
  85. GRB 110726A: Liverpool Telescope observations
  86. GRB 110726: ROTSE-III Detection of Optical Counterpart
  87. IPN triangulation of GRB 110721A
  88. GRB 110721A: Gemini-South spectroscopy of the potential optical counterpart
  89. GRB 110721A: potential counterpart candidate
  90. Konus-Wind observation of GRB 110721A
  91. GRB 110709B / EVLA detection of radio counterpart
  92. GRB 110719A / SMA 345 GHz upper limits
  93. GRB 110721A: Fermi-LAT detection
  94. Recent GCN/Swift-BAT Slew Burst Position notices are due to playback debugging
  95. GRB110715A: spectral lag analysis
  96. GRB 110715A : Suzaku WAM observation of the prompt emission
  97. GRB 110719A: GRT Optical Observation
  98. GRB 110719A: z-band upper limit
  99. Swift/UVOT observations of GRB110719A
  100. Swift J1822.3-1606 : Fermi GBM observation

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