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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"

32766 results found.

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

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