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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"

24519 results found.

  1. GRB 140506A: Swift-XRT refined Analysis
  2. Konus-Wind observation of GRB 140423A
  3. GRB 140502A: MITSuME Okayama upper limits
  4. GRB 140502A: Swift-BAT refined analysis
  5. GRB 140502A: Fermi GBM observation
  6. GRB 140430A: Swift-BAT refined analysis
  7. GRB 140501A: Fermi GBM detection
  8. GRB 140430A: Swift-XRT refined Analysis
  9. GRB 140430A : Liverpool Telescope optical afterglow observations
  10. GRB 140428A: GROND observations
  11. GRB 140428B: Fermi GBM observation
  12. Konus-Wind observation of GRB 140428B
  13. GRB 140428A: Swift-BAT refined analysis
  14. GRB 140423A: RTT150 optical observations
  15. IPN Triangulation of GRB 140428B (short/hard)
  16. GRB 140428A: Keck detection of a red optical afterglow candidate
  17. GRB 140428A: Swift-XRT detection of a source
  18. GRB 140428A: Swift Detection of a Possible Burst
  19. GRB 140423A: MITSuME Akeno upper limits
  20. GRB 140423A: MITSuME Akeno Optical observation
  21. DG CVn: optical observations
  22. GRB 140423A: Nishi-Harima NIR Observations
  23. GRB 140423A pODI/WIYN afterglow photometry
  24. GRB 140423A, Optical Observations
  25. GRB 140423A: Swift-BAT refined analysis
  26. GRB 140423A: MITSuME Okayama Optical Observation
  27. GRB 140423A: KAIT Optical Detection
  28. GRB 140423A: Nanshan optical upper limit
  29. GRB 140423A: Fermi GBM observation
  30. GRB 140423A: KWFC z-band photometry
  31. GRB 140419A, LOAO R-band observations
  32. GRB 140423A: ISON-MN early photometry and correction to the GCN circ. 16143
  33. GRB 140423A: ROTSE-III Detection of Optical Counterpart
  34. GRB 140423A optical observations with pODI/WIYN at KPNO
  35. GRB 140423A: Swift detection of a burst
  36. GRB 140419A: KAIT Refined Analysis
  37. Swift Trigger 596641 is not a GRB
  38. Konus-Wind observation of GRB 140419A
  39. GRB 140419A, Optical Observations
  40. GRB 140419A: MITSuME Ishigakijima Optical Observation
  41. GRB 140419A: MITSuME Okayama Optical Observation
  42. GRB 140419A: Swift-XRT refined Analysis
  43. GRB 140419A: Swift-BAT refined analysis
  44. GRB 140419A: T24 optical observations
  45. GRB 140419A: ROTSE-III Detection of Optical Counterpart
  46. GRB 140419A: Swift detection of a burst with optical afterglow
  47. Konus-Wind observation of GRB 140416A
  48. GRB 140416A: Fermi GBM detection
  49. GRB 140414A: Short burst found in ground analysis of BAT slew data
  50. Konus-Wind observation of GRB 140413A
  51. GRB 140413A: Swift-XRT refined Analysis
  52. GRB 140413A: Swift-BAT refined analysis
  53. GRB 140412A: Swift-BAT refined analysis
  54. Swift Trigger 595616: a possible GRB
  55. GRB 140408A: MITSuME Akeno Optical observation
  56. Fermi418277210: iPTF optical observations
  57. GRB 140408A: Swift-BAT refined analysis
  58. GRB 140408A: MITSuME Okayama upper limits
  59. GRB 140408A: Fermi GBM detection
  60. Swift Trigger 595162: a possible GRB
  61. GRB 140406A: Fermi GBM observation
  62. GRB 111225A: Archeological redshift of the Christmas Burst 2011 from GTC
  63. GRB 140331A: Continued RATIR Optical and NIR Observations
  64. GRB 140402A: MASTER optical observations
  65. GRB 140402A: Fermi GBM detection
  66. GRB 140402A: Fermi-LAT detection of a burst
  67. Swift trigger 594286: Is likely a noise trigger
  68. GRB 140330A: Fermi GBM observation
  69. GRB 140331A: Swift-BAT refined analysis
  70. Retraction of the Fermi/LAT high-energy counterpart for GRB 140330A
  71. GRB 140330A: intense and persistent gamma-ray emission detected by AGILE
  72. Konus-Wind observation of GRB 140330A
  73. GRB 140331A: MITSuME Okayama upper limits
  74. GRB 140330A: Fermi-LAT Detection
  75. GRB 140329A: Fermi-LAT detection
  76. Konus-Wind observation of GRB 140329A
  77. GRB 140329A: Fermi GBM observation of a bright burst
  78. Swift trigger 593744: detection of a flare from UV Cet
  79. GRB 140320D: Suzaku WAM observation of the prompt emission
  80. GRB 140323A : Suzaku WAM observation of the prompt emission
  81. GRB 140320C: Mondy optical observations and afterglow confirmation
  82. Konus-Wind observation of GRB 140323A
  83. GRB 140323A: Fermi-LAT detection
  84. GRB 140323A: Swift-XRT refined Analysis
  85. GRB 140323A: Fermi GBM observation
  86. GRB 140323A: Swift-BAT refined analysis
  87. GRB 140323A: Swift detection of a burst
  88. Konus-Wind observation of GRB 140320D
  89. GRB 140320B: P60 detection of a very red afterglow
  90. IPN Triangulation of very intense GRB 140320D
  91. GRB 140320C: Mini-GWAC prompt observation
  92. GRB 140320A: Swift-BAT refined analysis
  93. GRB 140320A: Fermi GBM detection
  94. GRB 140320C: Mondy optical observations
  95. GRB 140320A: Swift-XRT detection of an afterglow candidate
  96. GRB 140320C: MASTER optical observations
  97. GRB 140320C: A long GRB detected by INTEGRAL
  98. GRB 140320B: Xinglong TNT upper limit
  99. GRB 140320B: A long GRB detected by INTEGRAL
  100. GRB 140320A: Swift detection of a burst

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