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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"

42810 results found.

  1. GRB 110818A: Swift/UVOT Upper Limits
  2. GRB 110818A: Enhanced Swift-XRT position
  3. GRB 110818A: Optical afterglow and redshift from VLT/X-shooter
  4. GRB 110818A: Swift-XRT refined Analysis
  5. GRB 110815A: Swift-XRT and UVOT refined Analysis
  6. GRB 110818A, Swift-BAT refined analysis
  7. GRB 110815A : Suzaku WAM observation of the prompt emission
  8. GRB 110818A: Swift detection of a burst
  9. Konus-Wind observation of GRB 110815A
  10. IPN triangulation of GRB110815A (long, intense)
  11. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  12. GRB 110801A: optical observations at Mt. Terskol observatory
  13. GRB 110812A: SuperAGILE localization of a long GRB.
  14. SGR 1834.9-0846/ GRB 110807A, I-band observations
  15. Konus-Wind observation of GRB 110808B
  16. Konus-Wind observation of GRB 110808A
  17. IPN triangulation of GRB 110808B (short/hard/intense)
  18. A new photometric resource for GRB observers
  19. RXTE Discovery of the Spin Period of Swift J1834.9-0846
  20. Fermi Gamma-ray Burst Monitor trigger 110809.346 is not a GRB
  21. GRB 110808A: Swift/UVOT Detection
  22. Swift Trigger 458942 is probably not a burst
  23. GRB 110808A: Swift-BAT refined analysis
  24. GRB 110808A: Swift-XRT refined Analysis
  25. SGR J1834.9-0846: A Neutron Star in W41?
  26. Swift SGR 1834.9-0846: Swift-BAT refined analysis
  27. GRB 110808A: VLT/X-shooter spectroscopy
  28. GRB 110808A: Enhanced Swift-XRT position
  29. GRB 110808A: Swift detection of a burst with optical counterpart
  30. Fermi GBM detection of a SGR-like burst
  31. GRB 110807A: SAO RAS observations
  32. GRB 110807A: Swift detection of a burst or a posible new SGR
  33. Fermi Gamma-ray Burst Monitor trigger 110806.263 is not a GRB
  34. GRB 110726A: two epochs of SAO RAS optical observations
  35. Reprocessed enhanced Swift-XRT positions and GRB products
  36. Konus-Wind observation of GRB 110802A
  37. Fermi GBM trigger 334123030 (110804165) is not a GRB
  38. IPN triangulation of GRB110802A (short/hard burst)
  39. GRB 110801A: optical observations in CrAO
  40. EVLA observation for Fermi burst GRB 110721A
  41. GRB 110731A : Suzaku WAM observation of the prompt emission
  42. GRB 110726A: Swift-XRT refined Analysis
  43. GRB110731A: MOA optical observations of the steeply fading afterglow
  44. GRB 110801A: SAO RAS optical observations
  45. GRB 110801A: Evidence for a jet break
  46. GRB 110801A: MASTER OT observations
  47. GRB 110801A: Swift-BAT refined analysis
  48. Swift/UVOT observations of GRB110801A
  49. GRB 110801A: Swift-XRT refined Analysis
  50. GRB 110801A: Afterglow redshift from 10.4m GTC
  51. GRB 110801A: Enhanced Swift-XRT position
  52. AXP 4U 0142+61: Fermi GBM detection
  53. GRB 110801A: TLS Optical afterglow confirmation
  54. GRB 110801A: Swift detection of a burst with an optical counterpart
  55. GRB 110731A / EVLA upper limits
  56. GRB 110731A Gemini-N redshift
  57. GRB 110731A: Swift-XRT refined Analysis
  58. Konus-Wind observation of GRB 110731A
  59. GRB110731A: Swift/UVOT Observations
  60. GRB 110731A: Fermi GBM observation
  61. GRB 110731A: NOT photometry
  62. GRB 110731A: Enhanced Swift-XRT position
  63. Fermi-LAT Detection of GRB110731A
  64. GRB 110731A: Swift-BAT refined analysis
  65. GRB 110731A: FTN+FTS afterglow observations
  66. GRB 110731A: Swift detection of a burst with an optical counterpart
  67. Sw J1644+57 (GRB 110328A): Continued VLBA Observations
  68. INTEGRAL Weak trigger #6331: GRT Optical Observation
  69. GRB 110721A: Swift observations of afterglow candidate
  70. AXP 4U 0142+61: Swift-BAT refined analysis
  71. GRB 110726A: optical upper limit in CrAO
  72. Swift detection of a SGR-like burst from the AXP 4U 0142+61
  73. GRB 110726A: EVLA observations
  74. GRB 110726A: IAC80 R-band observations
  75. GRB 110726A: ROTSE-III refined analysis, fast decay in early phase
  76. GRB 110726A: Further Swift/UVOT Observations
  77. GRB110726A: Gemini-N tentative redshift
  78. GRB 110726A: Swift-BAT refined analysis
  79. GRB 110726A: Enhanced Swift-XRT position
  80. GRB 110726A: Swift/UVOT Detection
  81. GRB 110726A: Liverpool Telescope observations
  82. GRB 110726: ROTSE-III Detection of Optical Counterpart
  83. GRB 110726A: Swift detection of a burst
  84. IPN triangulation of GRB 110721A
  85. GRB 110721A: Preliminary Swift/UVOT Upper Limits
  86. GRB 110721A: Gemini-South spectroscopy of the potential optical counterpart
  87. GRB 110721A: potential counterpart candidate
  88. Konus-Wind observation of GRB 110721A
  89. GRB 110709B / EVLA detection of radio counterpart
  90. GRB 110719A / SMA 345 GHz upper limits
  91. GRB 110721A: Fermi-LAT detection
  92. GRB 110721A: Fermi GBM detection
  93. Recent GCN/Swift-BAT Slew Burst Position notices are due to playback debugging
  94. GRB110715A: spectral lag analysis
  95. GRB 110715A : Suzaku WAM observation of the prompt emission
  96. GRB 110719A: GRT Optical Observation
  97. GRB 110719A: z-band upper limit
  98. Swift J1822.3-1606 : Fermi GBM observation
  99. GRB 110719A: Swift-XRT refined Analysis
  100. GRB 110719A: optical upper limit

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