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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"

21923 results found.

  1. GRB 140311B: Enhanced Swift-XRT position
  2. GRB 140311B: TAROT Calern observatory optical observations
  3. GRB 140311A: NOT observations of the optical afterglow
  4. GRB 140311A: Zadko observatory - Gingin optical observations
  5. GRB 140311B: Swift-XRT observations
  6. GRB 140311B: Nanshan afterglow detection
  7. GRB 140311B: MASTER early optical observations
  8. GRB 140311A: MASTER early optical observations
  9. GRB 140304A: Suzaku WAM observation of the prompt emission
  10. IPN Triangulation of GRB 140308A
  11. GRB 140306A: Suzaku WAM observation of the prompt emission
  12. Konus-Wind observation of GRB 140306A
  13. IPN Triangulation of GRB 140306A
  14. GRB 140304A: Continued RATIR Optical and NIR Observations
  15. Trigger 590503: Swift-BAT triggered on noise
  16. GRB 140304A: MASTER OT light curve
  17. GRB 140304A: RATIR g-band Dropout
  18. GRB 140304A: Enhanced Swift-XRT position
  19. GRB 140304A: Fermi GBM detection
  20. GRB 140304A: 10.4m GTC redshift z = 5.39
  21. GRB 140304A: NOT observations and redshift estimate
  22. GRB 140304A: Swift/UVOT Upper Limits
  23. GRB 140304A: Khureltogot optical observations
  24. GRB 140304A: Mondy optical observations
  25. GRB 140304A: Afterglow decay from Nanshan observations
  26. GRB 140304A: Swift detection of a burst
  27. GRB 140301A: Swift/UVOT Upper Limits
  28. GRB 140302A: Swift/UVOT Upper Limits
  29. GRB 140302A: MITSuME Okayama upper limits
  30. GRB 140302A: Enhanced Swift-XRT position
  31. GRB 140301A: GROND Detection of the Optical/NIR Afterglow
  32. GRB 140302A: GROND afterglow candidate
  33. GRB 140302A: Swift detection of a burst
  34. GRB 140301A: NOT afterglow candidate
  35. GRB 140301A: Enhanced Swift-XRT position
  36. GRB 140301A: Skynet R-COP Observations
  37. GRB 140301A: Swift detection of a burst
  38. GRB 140226A/iPTF14yb: 1.23m CAHA observations
  39. GRB 140226A/iPTF14yb: Mondy optical observations
  40. GRB 140226A/iPTF14yb: RATIR Optical and NIR Observations
  41. GRB 140219A: Mondy optical observations of XRT source #5
  42. PTF14yb: GROND Transient Detection
  43. iPTF14yb: RATIR Optical and NIR Observations of the optical transient
  44. GRB 140219A: Suzaku WAM observation of the prompt emission
  45. GRB 140219A: MAXI/GSC detection
  46. GRB 140219A: the confirmation of the brightening SDSS J102406.41+062937.6 star
  47. GRB 140219A: MASTER optical brightening inside XRT-5 error box detection
  48. GRB 140219A: iPTF optical observations
  49. GRB 140102A: TAOS early optical afterglow detection
  50. GRB 140219A: optical observations of XRT source #5
  51. GRB 140219A: XRT afterglow candidate
  52. GRB 140221A: Results from Swift XRT tiled observations
  53. GRB 140219A: Xuyi and Nanshan upper limits
  54. GRB 140219A: MASTER before and after GRB observational arguments of the exceptionally Dark GRB
  55. GRB 140221A: MAXI/GSC detection
  56. GRB 140219A: Fermi-LAT detection of a burst
  57. Swift follow-up of an Integral weak transient
  58. GRB 140213A: Continued Skynet R-COP/PROMPT Observations of the Optical Afterglow
  59. GRB 140215A: RAPTOR Observations During Gamma-Ray Emitting Interval
  60. GRB 140213A: Continued Skynet R-COP/PROMPT Detections of a Rebrightening Optical Afterglow
  61. GRB 140215A: Continued Skynet PROMPT Observations of the Optical Afterglow
  62. GRB 140211A: Khureltogot optical upper limits
  63. GRB 140215A: Continued RATIR Optical and NIR Observations
  64. Konus-Wind observation of GRB 140213A
  65. Konus-Wind observation of GRB 140215A
  66. GRB 140215A: Swift/UVOT Detection
  67. GRB 140215A: Continued RATIR Optical and NIR Observations
  68. GRB 140215A: MITSuME Okayama Optical Observation
  69. GRB 140215A: ISON-NM optical observations
  70. GRB 140215A: Enhanced Swift-XRT position
  71. GRB 140215A: RATIR Optical and NIR Observations
  72. GRB 140215A: Swift detection of a burst with optical counterpart
  73. GRB 140213A: Swift-BAT refined analysis
  74. GRB140206A: Discovery Channel Telescope Optical Detection
  75. GRB 140213A: Enhanced Swift-XRT position
  76. GRB 140213A: GROND Detection of the Optical/NIR Afterglow
  77. GRB 140213A: Skynet R-COP Detection of Optical Afterglow
  78. GRB 140213A: Swift-XRT observations
  79. GRB 140213A: Swift detection of a burst
  80. Trigger 586482: Swift detection of GROJ1744-28
  81. GRB 140211A: Swift-BAT refined analysis
  82. GRB 140209A: Swift-XRT observations
  83. Konus-Wind observation of GRB 140209A
  84. GRB 140211A: MITSuME Okayama upper limits
  85. GRB 140209A: Early RAPTOR Optical Detection
  86. GRB 140209A: Swift-BAT Spectral lag analysis
  87. GRB 140206A: Bassano Bresciano Observatory optical upper limit
  88. GRB 140209A: optical observations
  89. GRB 140209A: Swift detection of a burst
  90. GRB 140206A: Mondy optical observations
  91. GRB 140206A, Swift-BAT refined analysis
  92. Konus-Wind observation of GRB 140206B
  93. GRB 140206A: MITSuME Akeno detection of the optical counterpart
  94. GRB 140206A: TNG redshift confirmation
  95. GRB 140206A: Optical Observations via Virtual Telescope
  96. GRB 140206A: NOT redshift
  97. GRB 140206A: TNG optical observations
  98. GRB 140206A: T100 observations
  99. GRB 140206A: Swift/UVOT Detection
  100. GRB 140206A: theoretical prediction of redshift and of supernova occurrence

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