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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"

24509 results found.

  1. GRB 130420A: Swift detection of a burst with an optical counterpart
  2. GRB 130420A: Faulkes Telescope North candidate
  3. GRB 130418A: SMARTS optical/IR afterglow observations
  4. GRB 130418A: Submm observations from SMA
  5. GRB 130419A, Swift-BAT refined analysis
  6. GRB 130327B: Swift/XRT source is not the afterglow
  7. GRB 130419B (Swift trigger Trigger 553930): MASTER-Net optical observations
  8. Trigger 553930: Swift detection of a possible flare from HR 5110
  9. GRB 130418A: T21 optical observation
  10. GRB 130418A: T18 and T21 optical observations
  11. GRB 130418A, Swift-BAT refined analysis
  12. GRB 130419A: Swift detection of a burst
  13. GRB 130418A: CARMA 3mm detection
  14. GRB130418A: OSN 1.5m fading afterglow detection
  15. GRB 130418A: Swift/UVOT Detection and request for continuing coverage
  16. GRB 130418A: Swift detection of a burst with an optical counterpart
  17. GRB 130408A: Suzaku WAM observation of the prompt emission
  18. GRB 130408A: SMARTS optical/IR afterglow observations
  19. GRB 130408A, Swift-BAT refined analysis
  20. GRB 130408A: Zadko observatory - Gingin optical observations
  21. Konus-Wind observation of GRB 130408A
  22. GRB 130408A: GROND detection of the afterglow
  23. GRB 130408A: Liverpool Telescope Optical candidate detection
  24. GRB 130408A: Swift detection of a burst
  25. GRB 130211A: Retraction of afterglow candidate
  26. GRB 130327B: Suzaku WAM observation of the prompt emission
  27. Konus-Wind observation of GRB 130320B
  28. IPN Triangulation of GRB 130320B (very long/bright)
  29. Swift/XRT observation of GRB 130327B
  30. Konus-Wind observation of GRB 130327B
  31. GRB 130327B: Fermi-LAT detection of a burst
  32. GRB 130327B: Fermi GBM detection
  33. GRB 130327A: Swift-BAT refined analysis
  34. GRB 130327A: Weihai optical obsevations
  35. Konus-Wind observation of GRB 130325A
  36. GRB 130327A: PAIRITEL NIR Afterglow Candidate
  37. GRB 130325A: Fermi LAT detection
  38. GRB 130327A: Swift detection of a burst
  39. GRB 130325A: Fermi GBM detection
  40. Konus-Wind observation of GRB 130320A
  41. IPN Triangulation of GRB 130320A (long/very bright)
  42. GRB 130305A: Gemini follow-up observations
  43. GRB 130315A: GROND afterglow candidate
  44. GRB 130315A, Swift-BAT refined analysis
  45. GRB 130315A: Swift detection of a burst
  46. GRB 130310A : Suzaku WAM observation of the prompt emission
  47. GRB 130305A: TLS Tautenburg observations
  48. GRB 130313A: TNG optical observations
  49. GRB 130215A: Detection of the SN with the 10.4m GTC
  50. GRB 130313A: Swift-XRT refined Analysis
  51. GRB 130313A: Swift-XRT detection of a possible X-ray afterglow
  52. GRB 130313A: Swift-BAT refined analysis
  53. GRB 130313A: MASTER-Net optical observations
  54. GRB 100424A: Keck host detection and VLT/X-shooter redshift
  55. GRB 130310A: optical observations
  56. GRB 130306A: Swift Detection of a Possible Afterglow
  57. GRB 130131B: host detection and redshift
  58. Konus-Wind observation of GRB 130310A
  59. GRB 130310A: Fermi GBM detection
  60. GRB 130310A: Fermi-LAT detection and localization
  61. GRB 130306A: MITSuME Ishigakijima upper limits
  62. GRB 130306A: Swift-BAT refined analysis
  63. Konus-Wind observation of GRB 130306A
  64. GRB 111123A: Keck-I host detection and VLT/X-shooter redshift
  65. GRB 130305A: Gemini-North upper limit
  66. GRB 130307A: Fermi GBM detection
  67. GRB 130306A: MASTER-Net pre-Swift alert observation
  68. GRB 130306A: Swift detection of a burst
  69. GRB 130305A: P60 Observations
  70. GRB 100615A: HST host detection and X-shooter redshift
  71. Konus-Wind observation of GRB 130305A
  72. GRB 130305A: Fermi GBM observation
  73. GRB 130305A: Fermi LAT Detection
  74. GBM trigger 383712005 (GRB 130228A?) : Possible high-energy photon emission in Fermi/LAT data
  75. GRB 130219A: Suzaku WAM observation of the prompt emission
  76. SGR 1806-20 outburst (trigger 549841), Swift-BAT refined analysis
  77. Konus-Wind observation of GRB 130219A
  78. GRB 130216B: Suzaku WAM observation of the prompt emission
  79. GRB 130215A: Suzaku WAM observation of the prompt emission
  80. GRB 130219A: Fermi GBM detection
  81. GRB 130216A: Further Swift-BAT refined analysis
  82. GRB 130216B: MASTER-Net early observation
  83. GRB 130216A: MASTER-Net early observations
  84. GRB 130216A: Fermi GBM observation
  85. GRB 130216B: Fermi GBM observation
  86. GRB 130216A: MITSuME Ishigakijima upper limits
  87. GRB 130216B BAT refined analysis
  88. GRB 130216A: Swift-BAT refined analysis
  89. GRB 130216B: Burst found in ground analysis of BAT data
  90. GRB 120118B: host observations and redshift determination
  91. GRB 130216A: Swift detection of a burst
  92. GRB 130215A: MITSuME Okayama Optical Observation
  93. GRB 130215A: Fermi GBM detection
  94. GRB 130215A: RAPTOR Measurements
  95. GRB 130215A: Xinglong optical observations
  96. GRB 130215A: Swift-BAT refined analysis
  97. GRB 130215A: CARMA 3mm detection
  98. GRB 130215A: P60 Observations
  99. Skynet Observations of GRB130215
  100. GRB 130215: ROTSE-III Detection of Optical Counterpart

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