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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"

11789 results found.

  1. GRB 110928A: Swift-XRT refined Analysis
  2. GRB 110928A: Swift-XRT observations
  3. GRB 110928A: ROTSE-III Optical Limits
  4. GRB 110924A: Swift detection of a possible burst
  5. GRB 110921A: Swift detection of a burst
  6. GRB 110918A optical observation
  7. GRB 110918A: Gemini-N redshift
  8. GRB 110918A: GROND detection of the afterglow candidate
  9. GRB 110918A: INT optical detection of Swift candidate afterglow
  10. GRB 110918A: Swift-XRT observations
  11. Konus-Wind observation of GRB 110918A
  12. GRB110918A: BOOTES-1 optical limit
  13. MAXI/GSC detection of a short soft X-ray transient
  14. GRB 110915A: Konus-Wind and Swift/BAT joint spectral analysis
  15. IPN triangulation of GRB 110918A (long duration, extremely intense)
  16. GRB 110915A: Swift-XRT refined Analysis
  17. GRB 110915B: XRT afterglow candidate
  18. GRB 110915B: SuperAGILE localization of a long GRB
  19. GRB 110915A: Prompt enhanced Swift-XRT position
  20. GRB 110915A: Swift detection of a burst
  21. GRB 110903A: Swift-XRT observations
  22. Konus-Wind observation of GRB 110903A
  23. GRB 110820A: optical upper limit
  24. Trigger 502024: Swift detection of KS 1741-293
  25. GRB110825A: ROTSE early time optical limit
  26. GRB110825A: Swift target of opportunity observation
  27. IPN triangulation of GRB110825A (very intense, long-duration)
  28. Konus-Wind observation of GRB 110820B
  29. GRB 110820A: MASTER-NET first hour observations
  30. IPN triangulation of GRB 110820B (very long duration, extremely intense)
  31. GRB 110820A: CrAO optical upper limit
  32. GRB 110820A: MASTER-NET observations
  33. GRB 110820A: Swift detection of a burst
  34. GRB 110818A: Fermi GBM observation
  35. GRB 110818A: Swift-XRT refined Analysis
  36. GRB 110815A : Suzaku WAM observation of the prompt emission
  37. GRB 110818A: Swift detection of a burst
  38. Konus-Wind observation of GRB 110815A
  39. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  40. GRB 110812A: SuperAGILE localization of a long GRB.
  41. SGR 1834.9-0846/ GRB 110807A, I-band observations
  42. Konus-Wind observation of GRB 110808B
  43. Konus-Wind observation of GRB 110808A
  44. GRB 110808A: Swift/UVOT Detection
  45. GRB 110808A: Swift-XRT refined Analysis
  46. GRB 110808A: Swift detection of a burst with optical counterpart
  47. GRB 110807A: Swift detection of a burst or a posible new SGR
  48. GRB 110726A: two epochs of SAO RAS optical observations
  49. Konus-Wind observation of GRB 110802A
  50. GRB 110726A: Swift-XRT refined Analysis
  51. GRB 110801A: MASTER OT observations
  52. GRB 110801A: Swift-XRT refined Analysis
  53. GRB110801A: MITSuME Ishigakijima Optical Observation
  54. GRB 110801A: TLS Optical afterglow confirmation
  55. Konus-Wind observation of GRB 110731A
  56. Fermi-LAT Detection of GRB110731A
  57. GRB 110731A: Swift detection of a burst with an optical counterpart
  58. GRB 110726A: optical upper limit in CrAO
  59. Swift detection of a SGR-like burst from the AXP 4U 0142+61
  60. GRB 110726A: Swift detection of a burst
  61. Konus-Wind observation of GRB 110721A
  62. GRB 110721A: Fermi-LAT detection
  63. GRB110715A: spectral lag analysis
  64. GRB 110719A: optical limit by "Pi of the Sky"
  65. GRB 110719A: Swift-XRT refined Analysis
  66. GRB 110719A: Swift detection of a burst
  67. Konus-Wind observation of GRB 110715A
  68. GRB 110709A / EVLA upper limits
  69. Konus-Wind observation of GRB 110708B
  70. GRB 110709B BAT refined analysis
  71. GRB 110709B: Swift-XRT refined Analysis
  72. GRB 110709A: Swift-XRT refined Analysis
  73. Konus-Wind observation of GRB 110709A
  74. Konus-Wind observation of GRB 110709B
  75. GRB110709A: upper limits from CAHA 1.23m and OSN 1.5m
  76. GRB 110708A: Lick observations
  77. GRB 110708A: a long GRB detected by INTEGRAL
  78. Konus-Wind observation of GRB 110705A
  79. GRB 110625A: Fermi GBM and LAT observations
  80. Konus-Wind observation of GRB 110625A
  81. GRB 110625A: ROTSE-III Optical Limits
  82. GRB 110604A: final update on Swift-XRT observations
  83. Konus-Wind observation of GRB 110618A
  84. GRB 110610A: MASTER-NET optical observations
  85. Konus-Wind observation of GRB 110604A
  86. GRB 110530A: Swift-XRT refined Analysis
  87. GRB 110530A: MASTER OT observations
  88. GRB 110530A: Swift detection of a burst with an optical afterglow
  89. Konus-Wind observation of GRB 110529A
  90. Swift J1644+57/GRB 110328A, Additional HST Observations
  91. GRB 110521A: MASTER prompt optical limit
  92. GRB 110521A: Swift-XRT refined analysis
  93. GRB 110521A: Swift detection of a burst
  94. GRB 110520A: Swift-XRT refined Analysis
  95. GRB 110520A: WHT IR observations
  96. GRB 110520A - NOT optical observation
  97. GRB 110520A: MASTER-NET optical observations
  98. GRB 110520A: Swift detection of a burst
  99. Konus-Wind observation of GRB 110518A
  100. IPN localization of bright GRB 110518A

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