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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"

45836 results found.

  1. GRB 130719A: Swift detection of a burst
  2. GRB 130716A: Fermi GBM observation
  3. GRB 130702A : Xinglong TNT continue optical observation
  4. GRB 130716A: Gemini-North imaging
  5. GRB 130716A: UVOT Upper Limits
  6. GRB 130716A: Probable short-hard burst with delayed Swift data
  7. GRB 130715A: Fermi GBM detection
  8. GRB 130626A: Retraction of possible X-ray afterglow
  9. GRB 130702A: Maidanak optical observations
  10. GMRT radio detection of GRB 130702A
  11. GRB 130708A: Swift XRT and UVOT Observations
  12. GRB 130702A: TNG spectroscopic observations of the emerging supernova
  13. GRB 130708A: Fermi GBM observation
  14. GRB 130702A: P200 Spectroscopic Confirmation of Associated Supernova
  15. GRB 130708A found in ground analysis of Swift-BAT data
  16. GRB 130702A: Maidanak optical observations
  17. GRB 130628A: Suzaku WAM observation of the prompt emission
  18. GRB130702A: NOT observation - the detection of an emerging supernova
  19. GRB 130702A: Continued RATIR Optical and NIR Observations
  20. GRB 130702A: Xinglong TNT optical observation
  21. GRB 130702A: Continued UVOT Observations
  22. GRB 130702A: VLA detection
  23. GRB 130702A (= Fermi 394416326): correction of the GCN #14988 title
  24. GRB 130702Ð
  25. GRB 130702A: WSRT radio detection
  26. Konus-Wind observation of GRB 130702A
  27. GRB130702A: Redshift of Afterglow Candidate iPTF13bxl
  28. GRB 130702A: further TNG observations
  29. GRB 130702A: NOT spectroscopy and redshift of the nearby bright galaxy
  30. GRB 130702A: further Swift-XRT observations
  31. GRB 130702A: Continued P60 observations
  32. GRB 130702A: RATIR Optical and NIR Observations
  33. GRB 130702A: CARMA 3mm detection
  34. GRB 130702A: NOT optical observations
  35. GRB 130702A: TNG optical observations
  36. GRB 130702A / Fermi394416326 : Nanshan optical observations
  37. IPN localization of GRB 130702A (= Fermi 394416326)
  38. Fermi GRB 130702A: Swift XRT and UVOT observations
  39. GRB 130702A / Fermi394416326: Fermi GBM detection
  40. GRB 130702A / Fermi394416326 : Fermi-LAT detection of a burst
  41. Fermi GBM trigger 394416326: MASTER early optical limit
  42. GRB 130628A: Fermi GBM detection
  43. Fermi394416326: FTN detection
  44. Fermi394416326: iPTF detection of a possible optical afterglow
  45. GRB 130627B: Swift afterglow confirmation
  46. Fermi GBM trigger 394325281 / 130630950 is not a GRB
  47. GRB 130623A: Second Swift-XRT observation
  48. GRB 130701A: MITSuME Akeno Optical observation
  49. GRB 130701B: Fermi GBM detection
  50. GRB 130701A: Swift-XRT refined Analysis
  51. GRB 130701A: P60 Observations
  52. GRB 130701A, Swift-BAT refined analysis
  53. Konus-Wind observation of GRB 130701A
  54. GRB 130701A: Swift/UVOT Detection
  55. GRB 130701A: VLT/X-shooter redshift
  56. GRB 130701A: Enhanced Swift-XRT position
  57. GRB 130701A: optical afterglow from the NOT
  58. GRB 130701A: Swift detection of a burst
  59. GRB 130627B, Swift-BAT refined analysis
  60. GRB 130627A, Swift-BAT refined analysis
  61. GRB 130627B: Swift/UVOT Upper Limits
  62. GRB 130627A: Swift/UVOT Upper Limits
  63. GRB 130627A: Swift-XRT refined Analysis
  64. GRB 130627B: Possible Swift-XRT afterglow detection
  65. Swift trigger 559221 is likely a false trigger coincident with IGR J17544-2619
  66. GRB 130627A: Enhanced Swift-XRT position
  67. GRB 130626A: KAIT Optical Observations
  68. GRB 130626A: RATIR Optical Observations
  69. GRB 130626A, Swift-BAT refined analysis
  70. GRB 130627A: Fermi GBM detection
  71. GRB 130623A: Fermi GBM detection
  72. GRB130627B: Swift/UVOT Observations
  73. GRB 130627B: Swift-XRT observations
  74. GRB 130626A: Swift-XRT possible detection and UVOT upper limits
  75. GRB 130627B: Swift detection of a burst
  76. GRB 130627A: Swift-XRT observations
  77. GRB 130627A: Swift/UVOT Observation
  78. GRB 130627A: Swift detection of a burst
  79. Swift Trigger 559108 is not astrophysical
  80. GRB 130626A: Swift detection of a short burst
  81. GRB 130625A: Swift-XRT refined Analysis
  82. GRB 130625A: MASTER afterglow limit
  83. GRB 130625A: Swift/UVOT Upper Limits
  84. GRB 130625A: Nanshan optical upper limit
  85. GRB 130623A: Swift-XRT and UVOT observations
  86. GRB 130625A: Swift-BAT refined analysis
  87. GRB 130625A: Enhanced Swift-XRT position
  88. GRB 130625A: Swift detection of a burst
  89. GRB 130603B: First epoch of XMM-Newton observations
  90. GRB 130623A detected in ground analysis of Swift-BAT data
  91. Swift Trigger 558828 is not an interesting event
  92. Swift Trigger 558631: AAO optical observations
  93. GRB 130614A: Suzaku WAM observation of the prompt emission
  94. Swift Trigger 558631 is not a real source
  95. GRB 130612A: Swift-BAT refined analysis
  96. GRB 130609B: Suzaku WAM observation of the prompt emission
  97. GRB 130612A: Continued Skynet/PROMPT/GORT/DSO observations
  98. GRB 130603B: Analogy with GRB 090510A and possible connection with a supernova
  99. Fermi/GBM observation of the Soft Gamma Repeater SGR J1550-5418
  100. Trigger 558399: Swift detection of the Soft Gamma Repeater AXP 1E1547.0-5408

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