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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. GRB 111005A: ATCA 18 GHz detection
  2. GRB 111005A: ATCA radio upper limit
  3. GRB 111005A : miniTAO/ANIR NIR observations
  4. GRB 111005A: GROND NIR observations
  5. GRB 111005A: Swift-BAT refined analysis
  6. GRB 111005A: Swift detection of a burst
  7. GRB 111003A: Fermi GBM detection
  8. GRB 110928A: Swift-XRT refined Analysis
  9. GRB 110825A: GROND Observations
  10. GRB 110928A: Enhanced Swift-XRT position
  11. GRB 110928A: Swift-BAT refined analysis
  12. GRB 110928A: Swift detection of a burst
  13. GRB 110924A: Swift detection of a possible burst
  14. GCN for GRB 110921B
  15. GRB 110921A: NOT observations
  16. GRB 110921A: Fermi GBM observation
  17. GRB 110921A: Swift-XRT refined Analysis
  18. GRB 110921A, Swift-BAT refined analysis
  19. GRB 110921A: Enhanced Swift-XRT position
  20. GRB 110918A: Swift-XRT refined Analysis
  21. GRB 110918A: Spectroscopy from GTC
  22. GRB 110921A: Swift detection of a burst
  23. GRB 110918A: rest-frame energetics in gamma-gays
  24. GRB 110918A optical observation
  25. GRB 110918A: Gemini-N redshift
  26. GRB 110918A: Afterglow Confirmation from PTF
  27. GRB 110918A: GROND detection of the afterglow candidate
  28. GRB 110918A: INT optical detection of Swift candidate afterglow
  29. GRB 110918A: pseudo-z= from prompt emission spectrum
  30. Konus-Wind observation of GRB 110918A
  31. GRB110918A: BOOTES-1 optical limit
  32. GRB 110915A: Konus-Wind and Swift/BAT joint spectral analysis
  33. IPN triangulation of GRB 110918A (long duration, extremely intense)
  34. GRB 110915B: GROND Observations of the Optical/NIR Afterglow Candidate
  35. GRB 110915A: GROND Upper limits
  36. GRB 110915A, Swift-BAT refined analysis
  37. GRB 110915A: Swift-XRT refined Analysis
  38. GRB 110903A: Suzaku WAM observation of the prompt emission
  39. GRB 110915A: Deep Gemini-South i/z-band imaging
  40. GRB 110915A: NOT observations
  41. GRB 110915A: Enhanced Swift-XRT position
  42. GRB 110915A: Prompt enhanced Swift-XRT position
  43. GRB 110915A: Swift detection of a burst
  44. GRB 110825A: Further Swift/XRT Observations
  45. GRB 110906A(?): Burst detection (unconfirmed) from Swift-BAT slew data
  46. MAXI J1836-194 (originally GRB 110905A): Swift-BAT refined analysis
  47. GRB 110905A / X-ray transient MAXI J1836-194: TNT optical observation
  48. GRB 110905A: Potential BAT trigger on MAXI J1836-194
  49. GRB 110905A: Swift detection of a burst
  50. GRB 110903A: Fermi GBM observation
  51. GRB 110903A: Swift-XRT observations
  52. Konus-Wind observation of GRB 110903A
  53. GRB 110903A: a long GRB detected by INTEGRAL
  54. SGR Swift J1834.9-0846: Correction to the Swift-BAT refined spectral analysis
  55. GRB110825A: Fermi GBM observation
  56. SGR Swift J1834.9-0846: Swift-BAT refined analysis of trigger 501752
  57. Swift detection of an SGR burst from Swift J1834.9-0846
  58. GRB 110825A: Suzaku WAM observation of the prompt emission
  59. GRB 110827A, Swift-BAT refined analysis
  60. GRB 110827A: Swift detection of a burst
  61. GRB110825A: Swift target of opportunity observation
  62. IPN triangulation of GRB110825A (very intense, long-duration)
  63. Swift-BAT Trigger 501485 is noise
  64. Swift-BAT refined analysis of SFXT IGR J08408-4503 (trigger 501368)
  65. Konus-Wind observation of GRB 110820B
  66. IPN triangulation of GRB 110820B (very long duration, extremely intense)
  67. GRB 110820A: Swift-XRT refined Analysis
  68. GRB 110820A: Swift-BAT refined analysis
  69. GRB 110820A: Enhanced Swift-XRT position
  70. GRB 110820A: Swift detection of a burst
  71. GRB 110818A: Fermi GBM observation
  72. GRB 110818A: Enhanced Swift-XRT position
  73. GRB 110818A, Swift-BAT refined analysis
  74. GRB 110815A : Suzaku WAM observation of the prompt emission
  75. GRB 110818A: Swift detection of a burst
  76. Konus-Wind observation of GRB 110815A
  77. IPN triangulation of GRB110815A (long, intense)
  78. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  79. SGR 1834.9-0846/ GRB 110807A, I-band observations
  80. Konus-Wind observation of GRB 110808B
  81. Konus-Wind observation of GRB 110808A
  82. IPN triangulation of GRB 110808B (short/hard/intense)
  83. A new photometric resource for GRB observers
  84. GRB 110808A: Swift-BAT refined analysis
  85. GRB 110808A: Swift-XRT refined Analysis
  86. SGR J1834.9-0846: A Neutron Star in W41?
  87. Swift SGR 1834.9-0846: Swift-BAT refined analysis
  88. GRB 110808A: Enhanced Swift-XRT position
  89. GRB 110808A: Swift detection of a burst with optical counterpart
  90. Fermi GBM detection of a SGR-like burst
  91. GRB 110807A: Swift detection of a burst or a posible new SGR
  92. GRB 110726A: two epochs of SAO RAS optical observations
  93. Reprocessed enhanced Swift-XRT positions and GRB products
  94. Konus-Wind observation of GRB 110802A
  95. IPN triangulation of GRB110802A (short/hard burst)
  96. EVLA observation for Fermi burst GRB 110721A
  97. GRB 110731A : Suzaku WAM observation of the prompt emission
  98. GRB 110726A: Swift-XRT refined Analysis
  99. GRB110731A: MOA optical observations of the steeply fading afterglow
  100. GRB 110801A: SAO RAS optical observations

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