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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"

28292 results found.

  1. GRB 130609A, Swift-BAT refined analysis
  2. GRB 130608A: Swift-BAT refined analysis
  3. GRB 130608A: Enhanced Swift-XRT position
  4. GRB 130609A: RATIR Optical and NIR Observations
  5. GRB130608A: BOOTES-2/TELMA upper limits
  6. GRB 130609A: Swift detection of a burst
  7. GRB 130608A: Swift detection of a burst
  8. GRB 130606A: Continued Skynet/PROMPT observations
  9. GRB 130606A: Continued RATIR Optical and NIR Monitoring
  10. GRB 130606B: AGILE-MCAL observation
  11. GRB 130606B: RATIR Optical and NIR Observations
  12. GRB 130606B: Swift-XRT observations
  13. GRB 130606A, Swift-BAT refined analysis
  14. GRB 130606A: TAROT Calern observatory early optical observations
  15. GRB 130606A: Skynet/PROMPT detection of the optical afterglow
  16. GRB 130606A: Swift/UVOT Upper Limits
  17. GRB 130603A: AAO optical observations
  18. GRB 130606A: Swift-XRT refined Analysis
  19. GRB 130606A: Enhanced Swift-XRT position
  20. Konus-Wind observation of GRB 130605A
  21. Konus-Wind observation of GRB 130606A
  22. GRB 130606A: GROND Detection of the Optical/NIR Afterglow
  23. GRB 130606A: AAO optical observations
  24. GRB 130606A: P60 Observations
  25. GRB 130606A: PAIRITEL NIR Afterglow Observations
  26. GRB 130606A: LOAO IZY Observation
  27. GRB 130606A: RATIR r'-band Dropout
  28. GRB 130606A:T100 observations
  29. GRB 130606B: Fermi-LAT detection of a bright hard burst
  30. GRB130606A: Montarrenti Observatory afterglow detection
  31. Virtual Telescope observations of GRB 130606A
  32. GRB 130605A: Swift-XRT refined Analysis
  33. GRB 130605A: Swift-BAT refined analysis
  34. Swift Trigger 557466 is not astrophysical
  35. GRB 130606A - Liverpool Telescope Optical Afterglow Confirmation
  36. GRB 130606A: IRSF NIR Observation
  37. GRB 130606A: NOT afterglow detection
  38. GRB 130606A: Swift detection of a burst
  39. GRB 130605A: Swift/UVOT Detection
  40. GRB 130604A: Swift-BAT refined analysis
  41. GRB 130605A: Continued Skynet/PROMPT observations
  42. GRB 130605A: TAROT La Silla observatory optical decay
  43. GRB 130605A: Skynet/PROMPT detection of a fading afterglow
  44. GRB 130605A: TAROT La Silla observatory optical detection of the afterglow
  45. GRB 130605A: GROND afterglow candidate
  46. GRB 130605A: Swift detection of a burst
  47. GRB 130603B: AMI-LA 15GHz observations
  48. GRB 130604A: Swift/UVOT Upper Limits
  49. Swift Trigger 557466 is probably not real.
  50. GRB 130604A: Swift-XRT refined Analysis
  51. GRB 130604B: Fermi GBM detection
  52. GRB 130603B: RATIR Optical and NIR Observations
  53. GRB 130604A: Enhanced Swift-XRT position
  54. GRB 130603B: P60 Observations
  55. GRB 130604A: MITSuME Okayama upper limits
  56. GRB130603B: Swift/UVOT detection
  57. GRB 130604A: ISON-NM optical upper limit
  58. GRB 130603A: MITSuME Akeno Optical observation
  59. GRB 130604A: Swift detection of a burst
  60. GRB 130603B: 5.8 GHz VLA detection
  61. GRB 130603A: SON optical observations
  62. GRB 130603B: Swift-XRT refined Analysis
  63. GRB 130603B: Gemini Observations
  64. GRB 130603B: optical follow-up and independent GTC redshift determination and afterglow spectrum
  65. GRB 130603B: Magellan redshift confirmation
  66. GRB 130603B: Afterglow detection from NOT
  67. GRB 130603B: WHT optical afterglow candidate
  68. GRB 130603B: Swift-BAT refined analysis
  69. GRB 130603A: Swift-XRT refined Analysis
  70. GRB 130603B: Enhanced Swift-XRT position
  71. Swift/UVOT observations of GRB130603A
  72. GRB 130603A: Enhanced Swift-XRT position
  73. GRB 130603A: Swift-BAT refined analysis
  74. GRB 130603B: Swift detection of a bright short burst
  75. GRB 130603A: MITSuME Okayama Optical Observation
  76. GRB 130603A: Swift-XRT observations
  77. GRB 130603A: Swift-XRT and Swift-UVOT detections
  78. GRB 130603A: Swift detection of a burst
  79. GRB 130529A: GROND upper limits
  80. GRB 130529A: Swift/UVOT Upper Limits
  81. GRB 130527A: Suzaku WAM observation of the prompt emission
  82. GRB 130529A: Swift-BAT refined analysis
  83. GRB 130518A: Suzaku WAM observation of the prompt emission
  84. GRB 130529A: Swift-XRT refined Analysis
  85. GRB 130529A: Enhanced Swift-XRT position
  86. GRB 130528A: Swift/UVOT Upper Limits
  87. GRB 130528A: Swift-BAT refined analysis
  88. GRB 130529A: Swift detection of a burst
  89. GRB 130528A: Swift-XRT refined Analysis
  90. GRB 130527A: Swift/UVOT Upper Limits
  91. GRB 130528A: Enhanced Swift-XRT position
  92. GRB 130521A: Skynet/PROMPT detection of an extremely red afterglow
  93. GRB 130528A: optical upper limit
  94. GRB 130528A: Swift detection of a burst
  95. GRB 130527A: NOT optical counterpart
  96. GRB 130527A: RATIR Optical and NIR Observations
  97. GRB 130527A: Swift-BAT refined analysis
  98. GRB 130527A: Swift-XRT refined Analysis
  99. GRB 130527A: Enhanced Swift-XRT position
  100. GRB 130527A: Swift detection of a bright burst

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