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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"

3059 results found.

  1. GRB130408A: Swift/UVOT followup observations
  2. GRB 130408A: Swift/UVOT Detection of the Optical Afterglow
  3. GRB 130408A: Liverpool Telescope Optical candidate detection
  4. Swift Trigger 552142: a possible GRB
  5. IPN triangulation of GRB 130228A
  6. SGR 1806-20 outburst (trigger 549841), Swift-BAT refined analysis
  7. GRB 130216A: Further Swift-BAT refined analysis
  8. GRB 130215A: Xinglong optical observations
  9. GRB 121123A: optical observations
  10. GRB 130131A: MITSuME Akeno Optical upper limits
  11. GRB 130131B: MITSuME Akeno Optical upper limits
  12. GRB 130131B: MITSuME Okayama optical upper limits
  13. GRB 130131A: Swift detection of a burst
  14. GRB 130122A: RTT150 optical observations
  15. GRB 130122A: Swift/UVOT Detection
  16. GRB 130122A: T100 observations
  17. GRB 130122A: Swift detection of a burst with an optical counterpart
  18. Swift-BAT refined analysis of SGR 1E 1841-045 (Trigger=543763)
  19. GRB 121212A: Swift detection of a burst
  20. GRB 121202A: Swift detection of a burst
  21. GRB 121201A: a GRB with an optical counterpart
  22. GRB 121128A, Swift-BAT refined analysis
  23. GRB 121123A: Swift-BAT refined analysis
  24. GRB 121117A: Swift/UVOT Observations
  25. GRB 121117A: ROTSE-III Optical Limits
  26. GRB 121102A: Enhanced Swift-XRT position
  27. GRB 121102A: Swift-XRT refined Analysis
  28. GRB 121102A: Swift-BAT refined analysis
  29. GRB 121102A: Swift detection of a burst
  30. GRB 121027A: sub-mm upper limit
  31. GRB 121029A: Fermi GBM detection
  32. GRB 121027A: Swift-XRT refined Analysis
  33. GRB 121027A: Brightening IR counterpart
  34. GRB 121024A: Swift detection of a burst with an optical counterpart
  35. IPN Triangulation of short hard GRB 121011B
  36. GRB 121011A, Swift-BAT refined analysis
  37. Swift-BAT refined analysis of the SGR 1806-20 outburst (trigger 535747)
  38. Trigger 535733: Swift possible detection of SAX J1828.5-1037
  39. GRB 120927A, Swift-BAT refined analysis
  40. GRB 120923A: Swift-BAT refined analysis
  41. GRB 120922A: Swift-BAT refined analysis
  42. GRB 120919A: Swift-XRT observations
  43. GRB 120918A: Swift-BAT refined analysis
  44. GRB 120913A: Swift-BAT refined analysis
  45. GRB 120913B: Swift detection of a burst
  46. GRB 120817A: FTN and FTS observations
  47. GRB 120811C: Swift-BAT refined analysis
  48. GRB 120811C: MASTER-Amur observations of fading OT
  49. GRB 120803B: Swift-BAT refined analysis
  50. GRB 120803B: MITSuME Akeno Optical upper limits
  51. GRB 120803B: Swift detection of a burst
  52. GRB 120802A: Swift-BAT refined analysis
  53. Konus-Wind observation of GRB 120728B
  54. GRB 120729A: Swift detection of a burst with an optical afterglow
  55. GRB 120716A: optical observation in Maidanak observatory
  56. GRB 120724A, Swift-BAT refined analysis
  57. Fermi GBM trigger 120716.498 is not a GRB
  58. Swift-BAT refined analysis of 1E 1841-045 (Trigger=526660)
  59. Trigger 526660: Swift detection of 1 E 1841-045 (aka Kes 73)
  60. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  61. GRB 120707A: Fermi GBM Detection of a Bright Burst
  62. Trigger 524584: Swift detection of Algol
  63. GRB 120528C: MAXI/GSC detection
  64. GRB 120528B: MAXI/GSC detection
  65. GRB 120521C: MASTER optical limit
  66. Fermi GBM Trigger 358364818 is not a GRB
  67. GRB 120510A: MAXI/GSC detection of a burst
  68. IPN Triangulation of GRB 120427A
  69. Swift detection of 4U 1630-47
  70. GRB 120422A: MITSuME Ishigakijima upper limit
  71. GRB 120422A: 272 GHz observations from SMA
  72. GRB 120402A: optical upper limit
  73. GRB 120402A: MASTER follow up observations
  74. GRB 120403A: Swift detection of a burst
  75. GRB 120327A: MITSuME Ishigakijima Optical Upper Limits at 1 day afterthe burst
  76. GRB 120326A: Swift-BAT refined analysis
  77. GRB 120320A, Swift-BAT refined analysis
  78. GRB 120305A: MASTER-NET early optical observations
  79. GRB 120226A: Fermi-GBM and Fermi-LAT detections; LAT position retraction
  80. GRB 120219A: Swift-BAT refined analysis
  81. GRB 120211A: MITSuME Okayama and Ishigakijima Optical upper limits
  82. GRB 120211A: Swift detection of a burst
  83. LS I +61 303: Swift-BAT refined analysis
  84. GRB 120121A: Swift-BAT refined analysis
  85. GRB 120121A: Enhanced Swift-XRT position
  86. GRB 120121A: Swift-XRT position
  87. GRB 120121A: Swift detection of a burst
  88. GRB 120116A: Swift-BAT refined analysis
  89. GRB 111228A: GMG optical observation
  90. GRB 111228A: Fermi GBM observation
  91. Konus-Wind observation of GRB 111215B
  92. GRB 111212A: GROND observations
  93. GRB 111209A: Swift UVOT refined analysis
  94. GRB 111209A: Swift Burst of Interest
  95. GRB 111209A: REM NIR detection
  96. Konus-Wind observation of GRB 111205A
  97. IPN Triangulation of GRB 111205A (long/hard/intense)
  98. GRB 111126A found in ground analysis of BAT data
  99. IPN Triangulation of GRB 111113A (short/hard/intense)
  100. GRB 111109A: Swift detection of a burst

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