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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"

19607 results found.

  1. GRB 130606A: Continued Skynet/PROMPT observations
  2. Swift Trigger 557674 was due to an onboard position error
  3. Swift Trigger 557674 is a probable new Galactic transient
  4. GRB 130606B: Swift-XRT observations
  5. GRB 130606A, Swift-BAT refined analysis
  6. GRB 130606A: TAROT Calern observatory early optical observations
  7. GRB 130606A: Skynet/PROMPT detection of the optical afterglow
  8. GRB 130606A: Swift/UVOT Upper Limits
  9. GRB 130603A: AAO optical observations
  10. GRB 130606A: Swift-XRT refined Analysis
  11. GRB 130606A: Enhanced Swift-XRT position
  12. Konus-Wind observation of GRB 130605A
  13. Konus-Wind observation of GRB 130606A
  14. GRB 130606A: GROND Detection of the Optical/NIR Afterglow
  15. GRB 130606A: AAO optical observations
  16. Trigger 557640: Swift detection of burst from SGR J1745-29
  17. GRB 130606A: PAIRITEL NIR Afterglow Observations
  18. GRB 130606A:T100 observations
  19. GRB 130606B: Fermi-LAT detection of a bright hard burst
  20. GRB130606A: Montarrenti Observatory afterglow detection
  21. GRB 130605A: Swift-XRT refined Analysis
  22. GRB 130605A: Swift-BAT refined analysis
  23. Swift Trigger 557466 is not astrophysical
  24. GRB 130606A - Liverpool Telescope Optical Afterglow Confirmation
  25. GRB 130606A: optical afterglow with BOOTES-2/TELMA and 1.23m CAHA
  26. GRB 130606A: Swift detection of a burst
  27. GRB 130605A: Swift/UVOT Detection
  28. GRB 130604A: Swift-BAT refined analysis
  29. GRB 130605A: Continued Skynet/PROMPT observations
  30. GRB 130605A: Skynet/PROMPT detection of a fading afterglow
  31. GRB 130605A: TAROT La Silla observatory optical detection of the afterglow
  32. GRB 130605A: GROND afterglow candidate
  33. GRB 130605A: Swift detection of a burst
  34. Konus-Wind observation of GRB 130603B
  35. GRB 130603B: MASTER-Net early observations and optical sloap limit
  36. GRB 130604A: Swift/UVOT Upper Limits
  37. Swift Trigger 557466 is probably not real.
  38. GRB 130604A: Swift-XRT refined Analysis
  39. GRB 130604A: Enhanced Swift-XRT position
  40. GRB 130604A: Gemini North Spectroscopy
  41. GRB 130603B: P60 Observations
  42. GRB130603B: Swift/UVOT detection
  43. GRB 130604A: further ISON-NM optical observation
  44. GRB 130604A: ISON-NM optical upper limit
  45. GRB 130604A: Swift detection of a burst
  46. GRB 130603B: Swift-XRT refined Analysis
  47. GRB 130603B: Swift-BAT Spectral lag analysis
  48. GRB 130603B: Swift-BAT refined analysis
  49. GRB 130603A: Swift-XRT refined Analysis
  50. GRB 130603B: Enhanced Swift-XRT position
  51. Swift/UVOT observations of GRB130603A
  52. GRB 130603A: Enhanced Swift-XRT position
  53. GRB 130603A: Swift-BAT refined analysis
  54. GRB 130603B: Swift detection of a bright short burst
  55. GRB 130603A: Swift-XRT observations
  56. GRB 130603A: Swift-XRT and Swift-UVOT detections
  57. GRB 130603A: Swift detection of a burst
  58. GRB 130529A: GROND upper limits
  59. GRB 130528A: Fermi GBM detection
  60. GRB 130529A: Swift/UVOT Upper Limits
  61. GRB 130527A: Suzaku WAM observation of the prompt emission
  62. GRB 130529A: Swift-BAT refined analysis
  63. GRB 130518A: Suzaku WAM observation of the prompt emission
  64. GRB 130529A: Swift-XRT refined Analysis
  65. GRB 130529A: Enhanced Swift-XRT position
  66. Konus-Wind observation of GRB 130528A
  67. GRB 130528A: Swift/UVOT Upper Limits
  68. Konus-Wind observation of GRB 130527A
  69. GRB 130529A: Prompt enhanced Swift-XRT position
  70. GRB 130528A: Swift-BAT refined analysis
  71. GRB 130529A: Swift detection of a burst
  72. GRB 130528A: Swift-XRT refined Analysis
  73. GRB 130527A: Swift/UVOT Upper Limits
  74. GRB 130528A: Enhanced Swift-XRT position
  75. GRB 130521A: Skynet/PROMPT detection of an extremely red afterglow
  76. GRB 130528A: Swift detection of a burst
  77. GRB 130527A: RATIR Optical and NIR Observations
  78. GRB 130527A: Swift-BAT refined analysis
  79. GRB 130527A: Swift-XRT refined Analysis
  80. GRB 130527A: BOOTES-2 & 3.5m CAHA opt/nIR observations
  81. GRB 130527A: Enhanced Swift-XRT position
  82. GRB 130527A: Prompt enhanced Swift-XRT position
  83. GRB 130527A: Swift detection of a bright burst
  84. GRB 130514A: Konus-Wind and Swift/BAT joint spectral analysis
  85. Swift Trigger 556533 is not an astrophysical event
  86. Swift Trigger 556533 is probably not an astrophysical event
  87. GRB 130521A: Skynet/PROMPT observations
  88. GRB 130514B: Further Swift-XRT Observations
  89. GRB 130518B, Swift-BAT refined analysis
  90. GRB 130521A, Swift-BAT refined analysis
  91. GRB 130521A: TAROT La Silla observatory optical observations
  92. GRB 130521A: Swift detection of a burst
  93. Swift XRT observation of GRB 130518B
  94. GRB 130515A: Suzaku WAM observation of the prompt emission
  95. GRB 130518A: 10.4m GTC/OSIRIS redshift
  96. Correction to GCN Circular 14682 (GRB 130518B)
  97. GRB 130518B found in ground analysis of Swift-BAT data
  98. GRB 130518A: Confirmation of the X-ray afterglow.
  99. GRB 130518A: P60 Afterglow Observations
  100. GRB 130518A: Swift XRT and UVOT possible afterglow

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