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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"

45746 results found.

  1. GRB 130722C Tiled Swift observations
  2. GRB 130722A: Enhanced Swift-XRT position
  3. GRB 130722A: Swift-XRT refined Analysis
  4. GRB 130722A: Skynet/GORT observations
  5. GRB 130719A, Swift-BAT refined analysis
  6. GRB 130722A: Faulkes Telescope South optical candidate
  7. GRB 130715A: Suzaku WAM observation of the prompt emission
  8. GRB 130722A: Swift detection of a burst
  9. GRB 130719A: Swift detection of a burst
  10. GRB 130716A: Fermi GBM observation
  11. GRB 130702A : Xinglong TNT continue optical observation
  12. GRB 130716A: Gemini-North imaging
  13. GRB 130716A: UVOT Upper Limits
  14. GRB 130716A: Probable short-hard burst with delayed Swift data
  15. GRB 130715A: Fermi GBM detection
  16. GRB 130626A: Retraction of possible X-ray afterglow
  17. GRB 130702A: Maidanak optical observations
  18. GMRT radio detection of GRB 130702A
  19. GRB 130708A: Swift XRT and UVOT Observations
  20. GRB 130702A: TNG spectroscopic observations of the emerging supernova
  21. GRB 130708A: Fermi GBM observation
  22. GRB 130702A: P200 Spectroscopic Confirmation of Associated Supernova
  23. GRB 130708A found in ground analysis of Swift-BAT data
  24. GRB 130702A: Maidanak optical observations
  25. GRB 130628A: Suzaku WAM observation of the prompt emission
  26. GRB130702A: NOT observation - the detection of an emerging supernova
  27. GRB 130702A: Continued RATIR Optical and NIR Observations
  28. GRB 130702A: Xinglong TNT optical observation
  29. GRB 130702A: Continued UVOT Observations
  30. GRB 130702A: VLA detection
  31. GRB 130702A (= Fermi 394416326): correction of the GCN #14988 title
  32. GRB 130702Ð
  33. GRB 130702A: WSRT radio detection
  34. Konus-Wind observation of GRB 130702A
  35. GRB130702A: Redshift of Afterglow Candidate iPTF13bxl
  36. GRB 130702A: further TNG observations
  37. GRB 130702A: NOT spectroscopy and redshift of the nearby bright galaxy
  38. GRB 130702A: further Swift-XRT observations
  39. GRB 130702A: Continued P60 observations
  40. GRB 130702A: RATIR Optical and NIR Observations
  41. GRB 130702A: CARMA 3mm detection
  42. GRB 130702A: NOT optical observations
  43. GRB 130702A: TNG optical observations
  44. GRB 130702A / Fermi394416326 : Nanshan optical observations
  45. IPN localization of GRB 130702A (= Fermi 394416326)
  46. Fermi GRB 130702A: Swift XRT and UVOT observations
  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 130627B: Swift afterglow confirmation
  54. Fermi GBM trigger 394325281 / 130630950 is not a GRB
  55. GRB 130623A: Second Swift-XRT observation
  56. GRB 130701A: MITSuME Akeno Optical observation
  57. GRB 130701B: Fermi GBM detection
  58. GRB 130701A: Swift-XRT refined Analysis
  59. GRB 130701A: P60 Observations
  60. GRB 130701A, Swift-BAT refined analysis
  61. Konus-Wind observation of GRB 130701A
  62. GRB 130701A: Swift/UVOT Detection
  63. GRB 130701A: VLT/X-shooter redshift
  64. GRB 130701A: Enhanced Swift-XRT position
  65. GRB 130701A: optical afterglow from the NOT
  66. GRB 130701A: Swift detection of a burst
  67. GRB 130627B, Swift-BAT refined analysis
  68. GRB 130627A, Swift-BAT refined analysis
  69. GRB 130627B: Swift/UVOT Upper Limits
  70. GRB 130627A: Swift/UVOT Upper Limits
  71. GRB 130627A: Swift-XRT refined Analysis
  72. GRB 130627B: Possible Swift-XRT afterglow detection
  73. Swift trigger 559221 is likely a false trigger coincident with IGR J17544-2619
  74. GRB 130627A: Enhanced Swift-XRT position
  75. GRB 130626A: KAIT Optical Observations
  76. GRB 130626A: RATIR Optical Observations
  77. GRB 130626A, Swift-BAT refined analysis
  78. GRB 130627A: Fermi GBM detection
  79. GRB 130623A: Fermi GBM detection
  80. GRB130627B: Swift/UVOT Observations
  81. GRB 130627B: Swift-XRT observations
  82. GRB 130626A: Swift-XRT possible detection and UVOT upper limits
  83. GRB 130627B: Swift detection of a burst
  84. GRB 130627A: Swift-XRT observations
  85. GRB 130627A: Swift/UVOT Observation
  86. GRB 130627A: Swift detection of a burst
  87. Swift Trigger 559108 is not astrophysical
  88. GRB 130626A: Swift detection of a short burst
  89. GRB 130625A: Swift-XRT refined Analysis
  90. GRB 130625A: MASTER afterglow limit
  91. GRB 130625A: Swift/UVOT Upper Limits
  92. GRB 130625A: Nanshan optical upper limit
  93. GRB 130623A: Swift-XRT and UVOT observations
  94. GRB 130625A: Swift-BAT refined analysis
  95. GRB 130625A: Enhanced Swift-XRT position
  96. GRB 130625A: Swift detection of a burst
  97. GRB 130603B: First epoch of XMM-Newton observations
  98. GRB 130623A detected in ground analysis of Swift-BAT data
  99. Swift Trigger 558828 is not an interesting event
  100. Swift Trigger 558631: AAO optical observations

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