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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"

37582 results found.

  1. GRB 130605A: TAROT La Silla observatory optical detection of the afterglow
  2. GRB 130605A: GROND afterglow candidate
  3. GRB 130605A: Swift detection of a burst
  4. GRB 130603B: rest-frame energetics in gamma-rays
  5. Konus-Wind observation of GRB 130603B
  6. GRB 130603B: MASTER-Net early observations and optical sloap limit
  7. GRB 130603B: AMI-LA 15GHz observations
  8. GRB 130604A: Swift/UVOT Upper Limits
  9. GRB 130604A: Swift-XRT refined Analysis
  10. GRB 130604B: Fermi GBM detection
  11. GRB 130603B: RATIR Optical and NIR Observations
  12. GRB 130604A: Enhanced Swift-XRT position
  13. GRB 130604A: Gemini North Spectroscopy
  14. GRB 130603B: P60 Observations
  15. GRB 130604A: MITSuME Okayama upper limits
  16. GRB130603B: Swift/UVOT detection
  17. GRB 130604A: further ISON-NM optical observation
  18. GRB 130603B: VLT/X-shooter redshift confirmation
  19. GRB 130604A: ISON-NM optical upper limit
  20. GRB 130603A: MITSuME Akeno Optical observation
  21. GRB 130604A: KAIT optical upper limit
  22. GRB 130604A: P60 optical afterglow candidate
  23. GRB 130604A: Swift detection of a burst
  24. GRB 130603B: 5.8 GHz VLA detection
  25. GRB 130603A: SON optical observations
  26. GRB 130603B: Swift-XRT refined Analysis
  27. GRB 130603B: Gemini Observations
  28. GRB 130603B: optical follow-up and independent GTC redshift determination and afterglow spectrum
  29. GRB 130603B: Swift-BAT Spectral lag analysis
  30. GRB 130603B: Magellan redshift confirmation
  31. GRB 130603B: Short GRB afterglow spectrum from GTC
  32. GRB 130603B: Afterglow detection from NOT
  33. GRB 130603B: WHT optical afterglow candidate
  34. GRB 130603B: Swift-BAT refined analysis
  35. GRB 130603A: Swift-XRT refined Analysis
  36. GRB 130603B: Enhanced Swift-XRT position
  37. Swift/UVOT observations of GRB130603A
  38. GRB 130603A: Enhanced Swift-XRT position
  39. GRB 130603A: Swift-BAT refined analysis
  40. GRB 130603B: Swift detection of a bright short burst
  41. GRB 130603A: MITSuME Okayama Optical Observation
  42. GRB 130603A: Swift-XRT observations
  43. GRB 130603A: Swift-XRT and Swift-UVOT detections
  44. GRB 130603A: Swift detection of a burst
  45. GRB 130529A: GROND upper limits
  46. GRB 130528A: Fermi GBM detection
  47. GRB 130529A: Swift/UVOT Upper Limits
  48. GRB 130527A: Suzaku WAM observation of the prompt emission
  49. GRB 130529A: Swift-BAT refined analysis
  50. GRB 130518A: Suzaku WAM observation of the prompt emission
  51. GRB 130529A: Swift-XRT refined Analysis
  52. GRB 130529A: Enhanced Swift-XRT position
  53. Konus-Wind observation of GRB 130528A
  54. GRB 130528A: Swift/UVOT Upper Limits
  55. Konus-Wind observation of GRB 130527A
  56. GRB 130529A: Prompt enhanced Swift-XRT position
  57. GRB 130528A: Swift-BAT refined analysis
  58. GRB 130529A: Swift detection of a burst
  59. GRB 130528A: Swift-XRT refined Analysis
  60. GRB 130527A: Swift/UVOT Upper Limits
  61. GRB 130528A: Enhanced Swift-XRT position
  62. GRB 130521A: Skynet/PROMPT detection of an extremely red afterglow
  63. GRB 130528A: optical upper limit
  64. GRB 130528A: Swift detection of a burst
  65. GRB 130527A: NOT optical counterpart
  66. GRB 130527A: RATIR Optical and NIR Observations
  67. GRB 130527A: Swift-BAT refined analysis
  68. GRB 130527A: Swift-XRT refined Analysis
  69. GRB 130527A: BOOTES-2 & 3.5m CAHA opt/nIR observations
  70. GRB 130527A: Enhanced Swift-XRT position
  71. GRB 130527A: Prompt enhanced Swift-XRT position
  72. GRB 130527A: Swift detection of a bright burst
  73. GRB 130514A: Konus-Wind and Swift/BAT joint spectral analysis
  74. Swift Trigger 556533 is not an astrophysical event
  75. GRB 130521B: Suzaku WAM observation of the prompt emission
  76. Konus-Wind observation of GRB 130521B
  77. GRB 130521A: Skynet/PROMPT observations
  78. IPN Triangulation of GRB 130521B
  79. GRB 130514B: Further Swift-XRT Observations
  80. GRB 130518B, Swift-BAT refined analysis
  81. GRB 130521A, Swift-BAT refined analysis
  82. GRB 130521A: TAROT La Silla observatory optical observations
  83. GRB 130521A: Swift detection of a burst
  84. Swift XRT observation of GRB 130518B
  85. GRB 130518A: mm detection at PdBI
  86. GRB 130515A: Suzaku WAM observation of the prompt emission
  87. GRB 130518A: Gemini Redshift confirmation
  88. GRB 130427A / SN 2013cq: Hubble Space Telescope Observations
  89. GRB 130518A: 10.4m GTC/OSIRIS redshift
  90. GRB 130518A: Continued RATIR Optical Observations - Fading
  91. Correction to GCN Circular 14682 (GRB 130518B)
  92. GRB 130518B found in ground analysis of Swift-BAT data
  93. GRB 130518A: Confirmation of the X-ray afterglow.
  94. GRB 130518A: P60 Afterglow Observations
  95. GRB 130518A: RATIR Optical and NIR Observations
  96. GRB 130518A: Swift XRT and UVOT possible afterglow
  97. Konus-Wind observation of GRB 130518A
  98. GRB 130518A Swift-BAT position from ground analysis
  99. GRB 130518A: Fermi LAT detection
  100. GRB 130518A: Fermi GBM detection

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