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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"

3047 results found.

  1. GRB 130131A: Swift detection of a burst
  2. GRB 130122A: RTT150 optical observations
  3. GRB 130122A: Swift/UVOT Detection
  4. GRB 130122A: T100 observations
  5. GRB 130122A: Swift detection of a burst with an optical counterpart
  6. Swift-BAT refined analysis of SGR 1E 1841-045 (Trigger=543763)
  7. GRB 121212A: Swift detection of a burst
  8. GRB 121202A: Swift detection of a burst
  9. GRB 121201A: a GRB with an optical counterpart
  10. GRB 121128A, Swift-BAT refined analysis
  11. GRB 121123A: Swift-BAT refined analysis
  12. GRB 121117A: Swift/UVOT Observations
  13. GRB 121117A: ROTSE-III Optical Limits
  14. GRB 121102A: Enhanced Swift-XRT position
  15. GRB 121102A: Swift-XRT refined Analysis
  16. GRB 121102A: Swift-BAT refined analysis
  17. GRB 121102A: Swift detection of a burst
  18. GRB 121027A: sub-mm upper limit
  19. GRB 121029A: Fermi GBM detection
  20. GRB 121027A: Swift-XRT refined Analysis
  21. GRB 121027A: Brightening IR counterpart
  22. GRB 121024A: Swift detection of a burst with an optical counterpart
  23. IPN Triangulation of short hard GRB 121011B
  24. GRB 121011A, Swift-BAT refined analysis
  25. Swift-BAT refined analysis of the SGR 1806-20 outburst (trigger 535747)
  26. Trigger 535733: Swift possible detection of SAX J1828.5-1037
  27. GRB 120927A, Swift-BAT refined analysis
  28. GRB 120923A: Swift-BAT refined analysis
  29. GRB 120922A: Swift-BAT refined analysis
  30. GRB 120919A: Swift-XRT observations
  31. GRB 120918A: Swift-BAT refined analysis
  32. GRB 120913A: Swift-BAT refined analysis
  33. GRB 120913B: Swift detection of a burst
  34. GRB 120817A: FTN and FTS observations
  35. GRB 120811C: Swift-BAT refined analysis
  36. GRB 120811C: MASTER-Amur observations of fading OT
  37. GRB 120803B: Swift-BAT refined analysis
  38. GRB 120803B: MITSuME Akeno Optical upper limits
  39. GRB 120803B: Swift detection of a burst
  40. GRB 120802A: Swift-BAT refined analysis
  41. Konus-Wind observation of GRB 120728B
  42. GRB 120729A: Swift detection of a burst with an optical afterglow
  43. GRB 120716A: optical observation in Maidanak observatory
  44. GRB 120724A, Swift-BAT refined analysis
  45. Fermi GBM trigger 120716.498 is not a GRB
  46. Swift-BAT refined analysis of 1E 1841-045 (Trigger=526660)
  47. Trigger 526660: Swift detection of 1 E 1841-045 (aka Kes 73)
  48. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  49. GRB 120707A: Fermi GBM Detection of a Bright Burst
  50. Trigger 524584: Swift detection of Algol
  51. GRB 120528C: MAXI/GSC detection
  52. GRB 120528B: MAXI/GSC detection
  53. GRB 120521C: MASTER optical limit
  54. Fermi GBM Trigger 358364818 is not a GRB
  55. GRB 120510A: MAXI/GSC detection of a burst
  56. IPN Triangulation of GRB 120427A
  57. Swift detection of 4U 1630-47
  58. GRB 120422A: MITSuME Ishigakijima upper limit
  59. GRB 120422A: 272 GHz observations from SMA
  60. GRB 120402A: optical upper limit
  61. GRB 120402A: MASTER follow up observations
  62. GRB 120403A: Swift detection of a burst
  63. GRB 120327A: MITSuME Ishigakijima Optical Upper Limits at 1 day afterthe burst
  64. GRB 120326A: Swift-BAT refined analysis
  65. GRB 120320A, Swift-BAT refined analysis
  66. GRB 120305A: MASTER-NET early optical observations
  67. GRB 120226A: Fermi-GBM and Fermi-LAT detections; LAT position retraction
  68. GRB 120219A: Swift-BAT refined analysis
  69. GRB 120211A: MITSuME Okayama and Ishigakijima Optical upper limits
  70. GRB 120211A: Swift detection of a burst
  71. LS I +61 303: Swift-BAT refined analysis
  72. GRB 120121A: Swift-BAT refined analysis
  73. GRB 120121A: Enhanced Swift-XRT position
  74. GRB 120121A: Swift-XRT position
  75. GRB 120121A: Swift detection of a burst
  76. GRB 120116A: Swift-BAT refined analysis
  77. GRB 111228A: GMG optical observation
  78. GRB 111228A: Fermi GBM observation
  79. Konus-Wind observation of GRB 111215B
  80. GRB 111212A: GROND observations
  81. GRB 111209A: Swift UVOT refined analysis
  82. GRB 111209A: Swift Burst of Interest
  83. GRB 111209A: REM NIR detection
  84. Konus-Wind observation of GRB 111205A
  85. IPN Triangulation of GRB 111205A (long/hard/intense)
  86. GRB 111126A found in ground analysis of BAT data
  87. IPN Triangulation of GRB 111113A (short/hard/intense)
  88. GRB 111109A: Swift detection of a burst
  89. GRB 111029A: SAO RAS optical limits
  90. GRB 111029A: Swift-BAT refined analysis
  91. GRB 111029A: Enhanced Swift-XRT position
  92. GRB 111024A: MAXI/GSC detection of a burst
  93. GRB 111022B: MITSuME Akeno Optical upper limits
  94. GRB 111022A: Swift-BAT refined analysis
  95. GRB 110915A: Konus-Wind and Swift/BAT joint spectral analysis
  96. IPN triangulation of GRB 110918A (long duration, extremely intense)
  97. GRB 110915A, Swift-BAT refined analysis
  98. GRB 110903A: Suzaku WAM observation of the prompt emission
  99. Konus-Wind observation of GRB 110903A
  100. SGR Swift J1834.9-0846: Swift-BAT refined analysis of trigger 501752

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