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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"

24514 results found.

  1. GRB 130806A: MITSuME Akeno Optical observation
  2. GRB 130806A: MITSuME Okayama upper limits
  3. GRB 130806A, Swift-BAT refined analysis
  4. IPN localization of GRB 130804A
  5. SGR 1745-29 (Swift trigger 565443), Swift-BAT refined analysis
  6. GRB 130806A: Swift detection of a burst
  7. GRB 130804A; Fermi GBM observation
  8. GRB 130803A: Swift-XRT refined Analysis
  9. GRB 130803A; Fermi GBM observation
  10. GRB 130803A, Swift-BAT refined analysis
  11. GRB 130803A: Swift detection of a burst
  12. GRB 130727A: Watcher optical limit
  13. Konus-Wind observation of GRB 130727A
  14. GRB 130727A: Fermi GBM detection
  15. GRB 130727A: Faulkes Telescope South optical afterglow
  16. GRB 130727A: Swift-BAT refined analysis
  17. GRB 130727A: Swift detection of a burst
  18. GRB 130725B: Swift trigger time correction
  19. GRB 130725B, Swift-BAT refined analysis
  20. GRB 130725A - Faulkes Telescope South Observations
  21. GRB 130725A: MITSuME Ishigakijima Optical Observation
  22. GRB 130725A, Swift-BAT refined analysis
  23. GRB 130719A: Skynet/PROMPT observations
  24. GRB 130725B: Swift detection of a burst
  25. Swift Trigger 563980 is GRB 130725A
  26. Swift Trigger 563980 cannot be identified at this time.
  27. Konus-Wind observation of GRB 130722A
  28. GRB 130722A: MITSuME Okayama upper limits
  29. GRB 130722A: Swift-XRT refined Analysis
  30. GRB 130722A: Skynet/GORT observations
  31. GRB 130719A, Swift-BAT refined analysis
  32. GRB 130722A: Faulkes Telescope South optical candidate
  33. GRB 130715A: Suzaku WAM observation of the prompt emission
  34. GRB 130719A: Swift detection of a burst
  35. GRB 130716A: Fermi GBM observation
  36. GRB 130702A : Xinglong TNT continue optical observation
  37. GRB 130715A: Fermi GBM detection
  38. GRB 130626A: Retraction of possible X-ray afterglow
  39. GRB 130708A: Fermi GBM observation
  40. GRB 130628A: Suzaku WAM observation of the prompt emission
  41. GRB130702A: NOT observation - the detection of an emerging supernova
  42. GRB 130702A: Xinglong TNT optical observation
  43. Konus-Wind observation of GRB 130702A
  44. GRB 130702A: Continued P60 observations
  45. GRB 130702A: NOT optical observations
  46. IPN localization of GRB 130702A (= Fermi 394416326)
  47. GRB 130702A / Fermi394416326: Fermi GBM detection
  48. GRB 130702A / Fermi394416326 : Fermi-LAT detection of a burst
  49. Fermi GBM trigger 394416326: MASTER early optical limit
  50. GRB 130628A: Fermi GBM detection
  51. Fermi394416326: FTN detection
  52. Fermi394416326: iPTF detection of a possible optical afterglow
  53. GRB 130701A: MITSuME Akeno Optical observation
  54. GRB 130701B: Fermi GBM detection
  55. GRB 130701A: P60 Observations
  56. GRB 130701A, Swift-BAT refined analysis
  57. Konus-Wind observation of GRB 130701A
  58. GRB 130627B, Swift-BAT refined analysis
  59. GRB 130627A, Swift-BAT refined analysis
  60. GRB 130627B: Possible Swift-XRT afterglow detection
  61. Swift trigger 559221 is likely a false trigger coincident with IGR J17544-2619
  62. GRB 130626A, Swift-BAT refined analysis
  63. GRB 130627A: Fermi GBM detection
  64. GRB 130623A: Fermi GBM detection
  65. GRB 130627B: Swift detection of a burst
  66. GRB 130627A: Swift detection of a burst
  67. GRB 130626A: Swift detection of a short burst
  68. GRB 130625A: MASTER afterglow limit
  69. GRB 130625A: Nanshan optical upper limit
  70. GRB 130623A: Swift-XRT and UVOT observations
  71. GRB 130625A: Swift-BAT refined analysis
  72. GRB 130623A detected in ground analysis of Swift-BAT data
  73. Swift Trigger 558631: AAO optical observations
  74. GRB 130614A: Suzaku WAM observation of the prompt emission
  75. Swift Trigger 558631 is not a real source
  76. GRB 130612A: Swift-BAT refined analysis
  77. GRB 130609B: Suzaku WAM observation of the prompt emission
  78. GRB 130612A: Continued Skynet/PROMPT/GORT/DSO observations
  79. GRB 130603B: Analogy with GRB 090510A and possible connection with a supernova
  80. Fermi/GBM observation of the Soft Gamma Repeater SGR J1550-5418
  81. GRB 130615A: Continued Skynet/PROMPT Observations
  82. GRB 130615A: Swift-XRT refined Analysis
  83. GRB 130614A: Fermi GBM detection
  84. GRB 130615A: Skynet/PROMPT Observations
  85. GRB 130615A: Swift-BAT refined analysis
  86. GRB 130615A: GROND afterglow candidate
  87. GRB 130615A: Swift detection of a burst
  88. GRB 130612A: Fermi GBM observation
  89. GRB 130603B: Detection of possible afterglow/kilonova in HST observations
  90. GRB 130612A: iTelescope T21 optical observations
  91. GRB 130606B: Suzaku WAM observation of the prompt emission
  92. GRB 130610A: iTelescope T21 optical observations
  93. GRB 130612A: MITSuME Okayama upper limits
  94. GRB130612A OSN I-band observations
  95. GRB 130612A: P60 Observations
  96. GRB 130612A: NOT optical observations
  97. GRB 130612A: Skynet/PROMPT detection of the optical afterglow
  98. GRB 130612A: PAIRITEL NIR Afterglow Observations
  99. GRB 130612A: Liverpool Telescope Afterglow detection
  100. GRB 130612A: Swift detection of a burst with an optical counterpart

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