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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"

26486 results found.

  1. GRB 111008A: IAC80 I-band observations
  2. GRB 111008A: VLT/X-shooter spectroscopy
  3. GRB 111008A: Swift-XRT refined Analysis
  4. GRB 111008A: Enhanced Swift-XRT position
  5. GRB 111008A, Swift-BAT refined analysis,
  6. GRB 111008A: Swift detection of a burst
  7. GRB 111005A: ATCA 18 GHz detection
  8. GRB 111005A: ATCA radio upper limit
  9. GRB 111005A : miniTAO/ANIR NIR observations
  10. GRB 111005A: GROND NIR observations
  11. GRB 111005A: Swift-BAT refined analysis
  12. GRB 111005A: Swift detection of a burst
  13. GRB 111003A: Fermi GBM detection
  14. GRB 110928A: Swift-XRT refined Analysis
  15. GRB 110825A: GROND Observations
  16. GRB 110928A: Enhanced Swift-XRT position
  17. GRB 110928A: Swift-BAT refined analysis
  18. GRB 110928A: Swift detection of a burst
  19. GRB 110924A: Swift detection of a possible burst
  20. GCN for GRB 110921B
  21. GRB 110921A: NOT observations
  22. GRB 110921A: Fermi GBM observation
  23. GRB 110921A: Swift-XRT refined Analysis
  24. GRB 110921A, Swift-BAT refined analysis
  25. GRB 110921A: Enhanced Swift-XRT position
  26. GRB 110918A: Swift-XRT refined Analysis
  27. GRB 110918A: Spectroscopy from GTC
  28. GRB 110921A: Swift detection of a burst
  29. GRB 110918A: rest-frame energetics in gamma-gays
  30. GRB 110918A optical observation
  31. GRB 110918A: Gemini-N redshift
  32. GRB 110918A: Afterglow Confirmation from PTF
  33. GRB 110918A: GROND detection of the afterglow candidate
  34. GRB 110918A: INT optical detection of Swift candidate afterglow
  35. GRB 110918A: pseudo-z= from prompt emission spectrum
  36. Konus-Wind observation of GRB 110918A
  37. GRB110918A: BOOTES-1 optical limit
  38. GRB 110915A: Konus-Wind and Swift/BAT joint spectral analysis
  39. IPN triangulation of GRB 110918A (long duration, extremely intense)
  40. GRB 110915B: GROND Observations of the Optical/NIR Afterglow Candidate
  41. GRB 110915A: GROND Upper limits
  42. GRB 110915A, Swift-BAT refined analysis
  43. GRB 110915A: Swift-XRT refined Analysis
  44. GRB 110903A: Suzaku WAM observation of the prompt emission
  45. GRB 110915A: Deep Gemini-South i/z-band imaging
  46. GRB 110915A: NOT observations
  47. GRB 110915A: Enhanced Swift-XRT position
  48. GRB 110915A: Prompt enhanced Swift-XRT position
  49. GRB 110915A: Swift detection of a burst
  50. GRB 110825A: Further Swift/XRT Observations
  51. GRB 110906A(?): Burst detection (unconfirmed) from Swift-BAT slew data
  52. MAXI J1836-194 (originally GRB 110905A): Swift-BAT refined analysis
  53. GRB 110905A / X-ray transient MAXI J1836-194: TNT optical observation
  54. GRB 110905A: Potential BAT trigger on MAXI J1836-194
  55. GRB 110905A: Swift detection of a burst
  56. GRB 110903A: Fermi GBM observation
  57. GRB 110903A: Swift-XRT observations
  58. Konus-Wind observation of GRB 110903A
  59. GRB 110903A: a long GRB detected by INTEGRAL
  60. SGR Swift J1834.9-0846: Correction to the Swift-BAT refined spectral analysis
  61. GRB110825A: Fermi GBM observation
  62. SGR Swift J1834.9-0846: Swift-BAT refined analysis of trigger 501752
  63. Swift detection of an SGR burst from Swift J1834.9-0846
  64. GRB 110825A: Suzaku WAM observation of the prompt emission
  65. GRB 110827A, Swift-BAT refined analysis
  66. GRB 110827A: Swift detection of a burst
  67. GRB110825A: Swift target of opportunity observation
  68. IPN triangulation of GRB110825A (very intense, long-duration)
  69. Swift-BAT Trigger 501485 is noise
  70. Swift-BAT refined analysis of SFXT IGR J08408-4503 (trigger 501368)
  71. Konus-Wind observation of GRB 110820B
  72. IPN triangulation of GRB 110820B (very long duration, extremely intense)
  73. GRB 110820A: Swift-XRT refined Analysis
  74. GRB 110820A: Swift-BAT refined analysis
  75. GRB 110820A: Enhanced Swift-XRT position
  76. GRB 110820A: Swift detection of a burst
  77. GRB 110818A: Fermi GBM observation
  78. GRB 110818A: Enhanced Swift-XRT position
  79. GRB 110818A, Swift-BAT refined analysis
  80. GRB 110815A : Suzaku WAM observation of the prompt emission
  81. GRB 110818A: Swift detection of a burst
  82. Konus-Wind observation of GRB 110815A
  83. IPN triangulation of GRB110815A (long, intense)
  84. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  85. SGR 1834.9-0846/ GRB 110807A, I-band observations
  86. Konus-Wind observation of GRB 110808B
  87. Konus-Wind observation of GRB 110808A
  88. IPN triangulation of GRB 110808B (short/hard/intense)
  89. A new photometric resource for GRB observers
  90. GRB 110808A: Swift-BAT refined analysis
  91. GRB 110808A: Swift-XRT refined Analysis
  92. SGR J1834.9-0846: A Neutron Star in W41?
  93. Swift SGR 1834.9-0846: Swift-BAT refined analysis
  94. GRB 110808A: Enhanced Swift-XRT position
  95. GRB 110808A: Swift detection of a burst with optical counterpart
  96. Fermi GBM detection of a SGR-like burst
  97. GRB 110807A: Swift detection of a burst or a posible new SGR
  98. GRB 110726A: two epochs of SAO RAS optical observations
  99. Reprocessed enhanced Swift-XRT positions and GRB products
  100. Konus-Wind observation of GRB 110802A

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