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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"

11781 results found.

  1. GRB 110918A: INT optical detection of Swift candidate afterglow
  2. GRB 110918A: Swift-XRT observations
  3. Konus-Wind observation of GRB 110918A
  4. GRB110918A: BOOTES-1 optical limit
  5. MAXI/GSC detection of a short soft X-ray transient
  6. GRB 110915A: Konus-Wind and Swift/BAT joint spectral analysis
  7. IPN triangulation of GRB 110918A (long duration, extremely intense)
  8. GRB 110915A: Swift-XRT refined Analysis
  9. GRB 110915B: XRT afterglow candidate
  10. GRB 110915B: SuperAGILE localization of a long GRB
  11. GRB 110915A: Prompt enhanced Swift-XRT position
  12. GRB 110915A: Swift detection of a burst
  13. GRB 110903A: Swift-XRT observations
  14. Konus-Wind observation of GRB 110903A
  15. GRB 110820A: optical upper limit
  16. Trigger 502024: Swift detection of KS 1741-293
  17. GRB110825A: ROTSE early time optical limit
  18. GRB110825A: Swift target of opportunity observation
  19. IPN triangulation of GRB110825A (very intense, long-duration)
  20. Konus-Wind observation of GRB 110820B
  21. GRB 110820A: MASTER-NET first hour observations
  22. IPN triangulation of GRB 110820B (very long duration, extremely intense)
  23. GRB 110820A: CrAO optical upper limit
  24. GRB 110820A: MASTER-NET observations
  25. GRB 110820A: Swift detection of a burst
  26. GRB 110818A: Fermi GBM observation
  27. GRB 110818A: Swift-XRT refined Analysis
  28. GRB 110815A : Suzaku WAM observation of the prompt emission
  29. GRB 110818A: Swift detection of a burst
  30. Konus-Wind observation of GRB 110815A
  31. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  32. GRB 110812A: SuperAGILE localization of a long GRB.
  33. SGR 1834.9-0846/ GRB 110807A, I-band observations
  34. Konus-Wind observation of GRB 110808B
  35. Konus-Wind observation of GRB 110808A
  36. GRB 110808A: Swift/UVOT Detection
  37. GRB 110808A: Swift-XRT refined Analysis
  38. GRB 110808A: Swift detection of a burst with optical counterpart
  39. GRB 110807A: Swift detection of a burst or a posible new SGR
  40. GRB 110726A: two epochs of SAO RAS optical observations
  41. Konus-Wind observation of GRB 110802A
  42. GRB 110726A: Swift-XRT refined Analysis
  43. GRB 110801A: MASTER OT observations
  44. GRB 110801A: Swift-XRT refined Analysis
  45. GRB110801A: MITSuME Ishigakijima Optical Observation
  46. GRB 110801A: TLS Optical afterglow confirmation
  47. Konus-Wind observation of GRB 110731A
  48. Fermi-LAT Detection of GRB110731A
  49. GRB 110731A: Swift detection of a burst with an optical counterpart
  50. GRB 110726A: optical upper limit in CrAO
  51. Swift detection of a SGR-like burst from the AXP 4U 0142+61
  52. GRB 110726A: Swift detection of a burst
  53. Konus-Wind observation of GRB 110721A
  54. GRB 110721A: Fermi-LAT detection
  55. GRB110715A: spectral lag analysis
  56. GRB 110719A: optical limit by "Pi of the Sky"
  57. GRB 110719A: Swift-XRT refined Analysis
  58. GRB 110719A: Swift detection of a burst
  59. Konus-Wind observation of GRB 110715A
  60. GRB 110709A / EVLA upper limits
  61. Konus-Wind observation of GRB 110708B
  62. GRB 110709B BAT refined analysis
  63. GRB 110709B: Swift-XRT refined Analysis
  64. GRB 110709A: Swift-XRT refined Analysis
  65. Konus-Wind observation of GRB 110709A
  66. Konus-Wind observation of GRB 110709B
  67. GRB110709A: upper limits from CAHA 1.23m and OSN 1.5m
  68. GRB 110708A: Lick observations
  69. GRB 110708A: a long GRB detected by INTEGRAL
  70. Konus-Wind observation of GRB 110705A
  71. GRB 110625A: Fermi GBM and LAT observations
  72. Konus-Wind observation of GRB 110625A
  73. GRB 110625A: ROTSE-III Optical Limits
  74. GRB 110604A: final update on Swift-XRT observations
  75. Konus-Wind observation of GRB 110618A
  76. GRB 110610A: MASTER-NET optical observations
  77. Konus-Wind observation of GRB 110604A
  78. GRB 110530A: Swift-XRT refined Analysis
  79. GRB 110530A: MASTER OT observations
  80. GRB 110530A: Swift detection of a burst with an optical afterglow
  81. Konus-Wind observation of GRB 110529A
  82. Swift J1644+57/GRB 110328A, Additional HST Observations
  83. GRB 110521A: MASTER prompt optical limit
  84. GRB 110521A: Swift-XRT refined analysis
  85. GRB 110521A: Swift detection of a burst
  86. GRB 110520A: Swift-XRT refined Analysis
  87. GRB 110520A: WHT IR observations
  88. GRB 110520A - NOT optical observation
  89. GRB 110520A: MASTER-NET optical observations
  90. GRB 110520A: Swift detection of a burst
  91. Konus-Wind observation of GRB 110518A
  92. IPN localization of bright GRB 110518A
  93. GRB 110519A: Swift detection of a burst
  94. Konus-Wind observation of GRB 110503A
  95. GRB 110422A: MASTER first 30 min OT light curve
  96. GRB 110503A: SARA-N Observations and Photometric Calibration
  97. GRB 110503A: Swift/UVOT Observations
  98. GRB 110503A: Swift-XRT refined Analysis
  99. GRB 110503A: Swift-BAT refined analysis
  100. GRB 110428A: Suzaku WAM observation of the prompt emission

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