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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"

45702 results found.

  1. GRB 140301A: Enhanced Swift-XRT position
  2. GRB 140301A: Skynet R-COP Observations
  3. GRB 140301A: Swift detection of a burst
  4. GRB 140226A/iPTF14yb: 1.23m CAHA observations
  5. GRB 140226A/iPTF14yb: Swift/UVOT Observations
  6. GRB 140226A/iPTF14yb: Mondy optical observations
  7. GRB 140226A/iPTF14yb: RATIR Optical and NIR Observations
  8. GRB 140226A / iPTF14yb: Swift-XRT confirms a fading X-ray source
  9. GRB 140219A: Mondy optical observations of XRT source #5
  10. Konus-Wind observation of GRB 140226A
  11. IPN triangulation of GRB 140226A, a possible GRB counterpart to iPTF14yb
  12. PTF14yb: GROND Transient Detection
  13. iPTF14yb: RATIR Optical and NIR Observations of the optical transient
  14. GRB 140219A: Suzaku WAM observation of the prompt emission
  15. iPTF14yb: Swift-XRT detection
  16. iPTF14yb: iPTF Discovery of an Optical Afterglow-like Transient
  17. GRB 140219A: MAXI/GSC detection
  18. GRB 140219A: the confirmation of the brightening SDSS J102406.41+062937.6 star
  19. GRB 140219A: Retraction of X-ray afterglow
  20. GRB 140219A: MASTER optical brightening inside XRT-5 error box detection
  21. GRB 140219A: iPTF optical observations
  22. GRB 140102A: TAOS early optical afterglow detection
  23. GRB 140219A: optical observations of XRT source #5
  24. GRB 140219A: XRT afterglow candidate
  25. GRB 140221A: Results from Swift XRT tiled observations
  26. GRB 140219A: Xuyi and Nanshan upper limits
  27. GRB 140219A: results from Swift XRT and UVOT tiled observations
  28. GRB 140219A: MASTER before and after GRB observational arguments of the exceptionally Dark GRB
  29. Konus-Wind observation of exceptionally bright GRB 140219A
  30. GRB 140221A Tiled Swift observations
  31. GRB 140221A: MAXI/GSC detection
  32. GRB 140219A: Fermi-LAT detection of a burst
  33. GRB 140219A: Fermi GBM Detection
  34. GRB 140219A Tiled Swift observations
  35. IPN Triangulation of extremely bright long GRB 140219A
  36. Swift follow-up of an Integral weak transient
  37. GRB 140213A: Continued Skynet R-COP/PROMPT Observations of the Optical Afterglow
  38. GRB 140215A: RAPTOR Observations During Gamma-Ray Emitting Interval
  39. Fermi GBM trigger 140214230 is not a GRB
  40. GRB 140213A: Continued Skynet R-COP/PROMPT Detections of a Rebrightening Optical Afterglow
  41. GRB 140215A: Continued Skynet PROMPT Observations of the Optical Afterglow
  42. GRB 140215A: WSRT radio observation
  43. GRB 140211A: Khureltogot optical upper limits
  44. GRB 140215A: Continued RATIR Optical and NIR Observations
  45. Konus-Wind observation of GRB 140213A
  46. Konus-Wind observation of GRB 140215A
  47. GRB 140215A: Swift/UVOT Detection
  48. GRB 140211A: Swift-XRT and UVOT observations
  49. GRB140215A: Continued Discovery Channel Telescope Observations
  50. GRB 140215A: Continued RATIR Optical and NIR Observations
  51. GRB 140215A: MITSuME Okayama Optical Observation
  52. GRB 140215A: Swift-BAT refined analysis
  53. GRB 140215A: ISON-NM optical observations
  54. GRB 140215A: Swift-XRT refined Analysis
  55. GRB 140215A: P60 observations
  56. GRB 140215A: Enhanced Swift-XRT position
  57. GRB 140215A: RATIR Optical and NIR Observations
  58. GRB140215A: Skynet PROMPT Optical Observations
  59. GRB 140215A: KAIT Optical Detection
  60. GRB140215A: Prompt Observations with Discovery Channel Telescope
  61. GRB 140215A: Swift detection of a burst with optical counterpart
  62. GRB 140213A: Swift-BAT refined analysis
  63. GRB140206A: Discovery Channel Telescope Optical Detection
  64. GRB 140213A: Swift/UVOT Observations
  65. GRB 140213A: Fermi GBM Detection
  66. GRB 140213A: Swift-XRT refined Analysis
  67. GRB140213A: VLT/X-shooter redshift
  68. GRB 140213A: Enhanced Swift-XRT position
  69. GRB 140213A: GROND Detection of the Optical/NIR Afterglow
  70. GRB 140213A: Skynet R-COP Detection of Optical Afterglow
  71. GRB 140213A: Swift-XRT observations
  72. GRB 140213A: Swift/UVOT Detection
  73. GRB 140213A: Swift detection of a burst
  74. GRB140211A : Xinglong TNT upper limit
  75. Trigger 586482: Swift detection of GROJ1744-28
  76. Correction to GCN 18521 "GRB140209A: Swift/UVOT observations"
  77. GRB140209A: Swift/UVOT observations.
  78. GRB 140211A: Swift-BAT refined analysis
  79. GRB 140209A: Swift-XRT observations
  80. Konus-Wind observation of GRB 140209A
  81. GRB 140211A: MITSuME Okayama upper limits
  82. GRB 140211A: Swift detection of a burst
  83. GRB 140209A: Early RAPTOR Optical Detection
  84. GRB 140209A: Swift-BAT Spectral lag analysis
  85. GRB 140206A: Bassano Bresciano Observatory optical upper limit
  86. GRB 140209A, Swift-BAT refined analysis
  87. GRB 140209A: Fermi GBM observation
  88. GRB 140209A: optical observations
  89. GRB 140209A: P60 optical afterglow detection
  90. GRB 140209A: Swift detection of a burst
  91. GRB 140206A: Mondy optical observations
  92. GRB 140206A: Liverpool Telescope optical afterglow observations
  93. GRB 140206A, Swift-BAT refined analysis
  94. Konus-Wind observation of GRB 140206B
  95. GRB 140206A: MITSuME Akeno detection of the optical counterpart
  96. GRB 140206A: TNG redshift confirmation
  97. GRB 140206A: Optical Observations via Virtual Telescope
  98. GRB 140206A: NOT redshift
  99. GRB 140206A: TNG optical observations
  100. GRB 140206A: Swift-XRT refined Analysis

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