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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"

43683 results found.

  1. GRB 140209A: Swift-BAT Spectral lag analysis
  2. GRB 140206A: Bassano Bresciano Observatory optical upper limit
  3. GRB 140209A, Swift-BAT refined analysis
  4. GRB 140209A: Fermi GBM observation
  5. GRB 140209A: optical observations
  6. GRB 140209A: P60 optical afterglow detection
  7. GRB 140209A: Swift detection of a burst
  8. GRB 140206A: Mondy optical observations
  9. GRB 140206A: Liverpool Telescope optical afterglow observations
  10. GRB 140206A, Swift-BAT refined analysis
  11. Konus-Wind observation of GRB 140206B
  12. GRB 140206A: MITSuME Akeno detection of the optical counterpart
  13. GRB 140206A: TNG redshift confirmation
  14. GRB 140206A: Optical Observations via Virtual Telescope
  15. GRB 140206A: NOT redshift
  16. GRB 140206A: TNG optical observations
  17. GRB 140206A: Swift-XRT refined Analysis
  18. GRB 140206A: T100 observations
  19. GRB 140206A: Fermi GBM detection
  20. GRB 140206A: Swift/UVOT Detection
  21. GRB 140206A: theoretical prediction of redshift and of supernova occurrence
  22. GRB 140206A: Enhanced Swift-XRT position
  23. GRB 140206A: ISON-Ussuriysk optical observations
  24. GRB 140206B: Fermi-LAT detection
  25. GRB 140206B: Fermi GBM detection
  26. GRB 140206A: Nanshan optical observations
  27. GRB 140206A: MASTER OT detection
  28. GRB 140206A: Swift/UVOT optical detection
  29. GRB140206A - Optical afterglow candidate
  30. GRB140206A: a long GRB detected by INTEGRAL
  31. GRB 140206A: Swift detection of a burst
  32. GRB 140129A: 5 GHz VLA observations
  33. GRB 140129A: Continued RATIR Optical and NIR Observations
  34. GRB 140129A: Khureltogot optical limit
  35. GRB 140129B: Swift/UVOT Detection
  36. GRB 140129A: Continued RATIR Optical and NIR Observations
  37. GRB 140129B: Swift-XRT refined Analysis
  38. GRB 140129B: MASTER OT early light curve
  39. GRB 140129A: CARMA early observations
  40. GRB 140129B, Swift-BAT refined analysis (probably not a short burst)
  41. GRB 140129A: P200 spectroscopy
  42. GRB 140129B: Enhanced Swift-XRT position
  43. GRB 140129A, Swift-BAT refined analysis
  44. GRB 140129A: Swift/UVOT Observations
  45. GRB 140129A: Swift-XRT refined Analysis
  46. GRB 140129B: MASTER OT confirmation
  47. GRB 140129B: Swift detection of a burst with an optical afterglow
  48. GRB 140129A: Enhanced Swift-XRT position
  49. GRB 140129A: ROTSE-III Detection of Optical Counterpart
  50. GRB 140129A: RATIR Optical and NIR Observations
  51. GRB 140129A: P60 optical afterglow detection
  52. GRB 140129A: Swift detection of a burst with an optical afterglow
  53. GRB 140122A/Fermi412093190: MASTER-Net early optical observations
  54. Fermi412093190: iPTF optical counterpart search
  55. GRB 140110A: Second Follow-up Swift-XRT Observation
  56. GRB 140114A: optical upper limit
  57. Correction: MAXI J1421-613: Skynet PROMPT/R-COP observations
  58. Konus-Wind observation of GRB 131215A
  59. GRB 140118A/MAXI J1421-613: Skynet PROMPT/R-COP observations
  60. GRB 140118A: RATIR Optical and NIR Observations
  61. GRB 140118A: Fermi GBM observation
  62. GRB 140118A, Swift-BAT refined analysis
  63. Swift Trigger 584155 is MAXI J1421-613
  64. GRB 140118A: Swift detection of a burst
  65. GRB 140110A: Further Swift-XRT Observation
  66. GRB 140103A: MASTER-Net early OT detection
  67. GRB 140103A: optical upper limit
  68. GRB 140108A: Mondy optical observations, refined analysis
  69. GRB 140114A: NOT afterglow observations
  70. GRB 140114A: Continued RATIR Optical and NIR Observations
  71. GRB 140114A: ROTSE-III Optical Limits
  72. GRB 140114A: Swift-XRT refined Analysis
  73. GRB 140114A: Swift-BAT refined analysis
  74. GRB 140114A: KAIT Optical Upper Limit
  75. GRB 140103A: AAO optical afterglow candidate
  76. GRB 140104B: Further Swift XRT observations
  77. GRB 140114A: Enhanced Swift-XRT position
  78. GRB 140114A: RATIR Optical and NIR Afterglow Detection
  79. Fermi Gamma-ray Burst Monitor trigger 411362827 is not a GRB
  80. GRB 140102A: AAO optical upper limits
  81. GRB 140114A: P60 Observations
  82. GRB 140114A: Swift detection of a burst
  83. GRB 140108A: Konkoly optical observations
  84. GRB 140110A: Swift/UVOT retraction of UVOT candidates
  85. IPN Triangulation of GRB 140110A
  86. GRB 140110A: Swift/UVOT Observations
  87. GRB 140108A: Suzaku WAM observation of the prompt emission
  88. GRB 140104B: Suzaku WAM observation of the prompt emission
  89. GRB 140110A: Swift XRT observations
  90. GRB 140110A: Reported UVOT OT not GRB afterglow
  91. GRB 140110A: OT detection in Swift/UVOT imaging
  92. GRB 140108A BAT refined analysis update *CORRECTION*
  93. GRB 140108A BAT refined analysis update
  94. GRB 140110A: Fermi GBM observation
  95. GRB 140110A Tiled Swift observations
  96. GRB 140110A: Fermi-LAT detection of a burst
  97. GRB 140108A: Mondy optical upper limit
  98. GRB 140105A: MASTER-Net early optical observations and time correction
  99. GRB 131231A: AAO optical observations
  100. GRB 140108A: Swift-BAT refined analysis

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