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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"

42546 results found.

  1. GRB 140219A: Mondy optical observations of XRT source #5
  2. Konus-Wind observation of GRB 140226A
  3. IPN triangulation of GRB 140226A, a possible GRB counterpart to iPTF14yb
  4. PTF14yb: GROND Transient Detection
  5. iPTF14yb: RATIR Optical and NIR Observations of the optical transient
  6. GRB 140219A: Suzaku WAM observation of the prompt emission
  7. iPTF14yb: Swift-XRT detection
  8. iPTF14yb: iPTF Discovery of an Optical Afterglow-like Transient
  9. GRB 140219A: MAXI/GSC detection
  10. GRB 140219A: the confirmation of the brightening SDSS J102406.41+062937.6 star
  11. GRB 140219A: Retraction of X-ray afterglow
  12. GRB 140219A: MASTER optical brightening inside XRT-5 error box detection
  13. GRB 140219A: iPTF optical observations
  14. GRB 140102A: TAOS early optical afterglow detection
  15. GRB 140219A: optical observations of XRT source #5
  16. GRB 140219A: XRT afterglow candidate
  17. GRB 140221A: Results from Swift XRT tiled observations
  18. GRB 140219A: Xuyi and Nanshan upper limits
  19. GRB 140219A: results from Swift XRT and UVOT tiled observations
  20. GRB 140219A: MASTER before and after GRB observational arguments of the exceptionally Dark GRB
  21. Konus-Wind observation of exceptionally bright GRB 140219A
  22. GRB 140221A Tiled Swift observations
  23. GRB 140221A: MAXI/GSC detection
  24. GRB 140219A: Fermi-LAT detection of a burst
  25. GRB 140219A: Fermi GBM Detection
  26. GRB 140219A Tiled Swift observations
  27. Swift follow-up of an Integral weak transient
  28. GRB 140213A: Continued Skynet R-COP/PROMPT Observations of the Optical Afterglow
  29. GRB 140215A: RAPTOR Observations During Gamma-Ray Emitting Interval
  30. GRB 140213A: Continued Skynet R-COP/PROMPT Detections of a Rebrightening Optical Afterglow
  31. GRB 140215A: Continued Skynet PROMPT Observations of the Optical Afterglow
  32. GRB 140215A: WSRT radio observation
  33. GRB 140211A: Khureltogot optical upper limits
  34. GRB 140215A: Continued RATIR Optical and NIR Observations
  35. Konus-Wind observation of GRB 140213A
  36. Konus-Wind observation of GRB 140215A
  37. GRB 140215A: Swift/UVOT Detection
  38. GRB 140211A: Swift-XRT and UVOT observations
  39. GRB140215A: Continued Discovery Channel Telescope Observations
  40. GRB 140215A: Continued RATIR Optical and NIR Observations
  41. GRB 140215A: MITSuME Okayama Optical Observation
  42. GRB 140215A: Swift-BAT refined analysis
  43. GRB 140215A: ISON-NM optical observations
  44. GRB 140215A: Swift-XRT refined Analysis
  45. GRB 140215A: P60 observations
  46. GRB 140215A: T24 optical observations
  47. GRB 140215A: Enhanced Swift-XRT position
  48. GRB 140215A: RATIR Optical and NIR Observations
  49. GRB140215A: Skynet PROMPT Optical Observations
  50. GRB 140215A: KAIT Optical Detection
  51. GRB140215A: Prompt Observations with Discovery Channel Telescope
  52. GRB 140215A: Swift detection of a burst with optical counterpart
  53. GRB 140213A: Swift-BAT refined analysis
  54. GRB140206A: Discovery Channel Telescope Optical Detection
  55. GRB 140213A: Swift/UVOT Observations
  56. GRB 140213A: Fermi GBM Detection
  57. GRB 140213A: Swift-XRT refined Analysis
  58. GRB140213A: VLT/X-shooter redshift
  59. GRB 140213A: Enhanced Swift-XRT position
  60. GRB 140213A: GROND Detection of the Optical/NIR Afterglow
  61. GRB 140213A: Skynet R-COP Detection of Optical Afterglow
  62. GRB 140213A: Swift-XRT observations
  63. GRB 140213A: Swift/UVOT Detection
  64. GRB 140213A: Swift detection of a burst
  65. GRB140211A : Xinglong TNT upper limit
  66. Trigger 586482: Swift detection of GROJ1744-28
  67. GRB140209A: Swift/UVOT observations.
  68. GRB 140211A: Swift-BAT refined analysis
  69. GRB 140209A: Swift-XRT observations
  70. Konus-Wind observation of GRB 140209A
  71. GRB 140211A: MITSuME Okayama upper limits
  72. GRB 140211A: Swift detection of a burst
  73. GRB 140209A: Early RAPTOR Optical Detection
  74. GRB 140209A: Swift-BAT Spectral lag analysis
  75. GRB 140206A: Bassano Bresciano Observatory optical upper limit
  76. GRB 140209A, Swift-BAT refined analysis
  77. GRB 140209A: Fermi GBM observation
  78. GRB 140209A: optical observations
  79. GRB 140209A: P60 optical afterglow detection
  80. GRB 140209A: Swift detection of a burst
  81. GRB 140206A: Mondy optical observations
  82. GRB 140206A: Liverpool Telescope optical afterglow observations
  83. GRB 140206A, Swift-BAT refined analysis
  84. Konus-Wind observation of GRB 140206B
  85. GRB 140206A: MITSuME Akeno detection of the optical counterpart
  86. GRB 140206A: TNG redshift confirmation
  87. GRB 140206A: Optical Observations via Virtual Telescope
  88. GRB 140206A: NOT redshift
  89. GRB 140206A: TNG optical observations
  90. GRB 140206A: Swift-XRT refined Analysis
  91. GRB 140206A: T100 observations
  92. GRB 140206A: Fermi GBM detection
  93. GRB 140206A: Swift/UVOT Detection
  94. GRB 140206A: theoretical prediction of redshift and of supernova occurrence
  95. GRB 140206A: Enhanced Swift-XRT position
  96. GRB 140206A: ISON-Ussuriysk optical observations
  97. GRB 140206B: Fermi-LAT detection
  98. GRB 140206B: Fermi GBM detection
  99. GRB 140206A: Nanshan optical observations
  100. GRB 140206A: MASTER OT detection

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