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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"

12170 results found.

  1. Konus-Wind observation of GRB 130702A
  2. GRB 130702A: NOT spectroscopy and redshift of the nearby bright galaxy
  3. Fermi GRB 130702A: Swift XRT and UVOT observations
  4. GRB 130702A / Fermi394416326 : Fermi-LAT detection of a burst
  5. GRB 130701B: Fermi GBM detection
  6. GRB 130701A: Swift-XRT refined Analysis
  7. Konus-Wind observation of GRB 130701A
  8. GRB 130627A, Swift-BAT refined analysis
  9. GRB 130627A: Swift-XRT refined Analysis
  10. GRB 130626A: KAIT Optical Observations
  11. GRB 130627A: Swift-XRT observations
  12. Fermi/GBM observation of the Soft Gamma Repeater SGR J1550-5418
  13. Trigger 558399: Swift detection of the Soft Gamma Repeater AXP 1E1547.0-5408
  14. GRB 130615A: Swift-XRT refined Analysis
  15. GRB 130615A: Swift detection of a burst
  16. GRB 130612A: Swift-XRT refined Analysis
  17. GRB 130612A: Zadko observatory - Gingin optical observations
  18. GRB 130612A: P60 Observations
  19. GRB 130612A: Swift detection of a burst with an optical counterpart
  20. Konus-Wind observation of GRB 130610B
  21. GRB 130609B: Fermi GBM observation
  22. IPN Triangulation of GRB 130610B (long/multipeaked)
  23. GRB 130609B: GROND observations
  24. GMRT radio observation of GRB 130603B
  25. Konus-Wind observation of GRB 130609B
  26. GRB 130610A: Swift-XRT refined Analysis
  27. GRB 130609B: Swift-XRT refined Analysis
  28. GRB 130608A: Swift-XRT refined Analysis
  29. GRB 130609A: Swift-XRT refined Analysis
  30. GRB 130609A: P60 nondetection
  31. GRB 130609A: Swift detection of a burst
  32. GRB 130608A: Swift detection of a burst
  33. GRB 130606B: AGILE-MCAL observation
  34. GRB 130606B: Swift-XRT observations
  35. GRB 130603A: AAO optical observations
  36. GRB 130606A: Swift-XRT refined Analysis
  37. Konus-Wind observation of GRB 130605A
  38. Konus-Wind observation of GRB 130606A
  39. Trigger 557640: Swift detection of burst from SGR J1745-29
  40. Konus-Wind observation of GRB 130606B
  41. GRB 130606B: Fermi-LAT detection of a bright hard burst
  42. GRB 130606A: Swift detection of a burst
  43. GRB 130605A: Swift detection of a burst
  44. Konus-Wind observation of GRB 130603B
  45. GRB 130603B: MASTER-Net early observations and optical sloap limit
  46. GRB 130604A: Swift-XRT refined Analysis
  47. GRB 130604A: KAIT optical upper limit
  48. GRB 130604A: P60 optical afterglow candidate
  49. GRB 130604A: Swift detection of a burst
  50. GRB 130603B: Swift-XRT refined Analysis
  51. GRB 130603A: Swift-XRT refined Analysis
  52. GRB 130603B: Swift detection of a bright short burst
  53. GRB 130603A: Swift-XRT observations
  54. GRB 130529A: GROND upper limits
  55. GRB 130529A: Swift-BAT refined analysis
  56. GRB 130529A: Swift-XRT refined Analysis
  57. Konus-Wind observation of GRB 130528A
  58. Konus-Wind observation of GRB 130527A
  59. GRB 130528A: Swift-XRT refined Analysis
  60. GRB 130528A: optical upper limit
  61. GRB 130528A: Swift detection of a burst
  62. GRB 130527A: Swift-XRT refined Analysis
  63. GRB 130527A: BOOTES-2 & 3.5m CAHA opt/nIR observations
  64. GRB 130527A: Prompt enhanced Swift-XRT position
  65. GRB 130527A: Swift detection of a bright burst
  66. GRB 130514A: Konus-Wind and Swift/BAT joint spectral analysis
  67. Konus-Wind observation of GRB 130521B
  68. Swift XRT observation of GRB 130518B
  69. GRB 130427A / SN 2013cq: Hubble Space Telescope Observations
  70. Konus-Wind observation of GRB 130518A
  71. GRB 130518A: Fermi LAT detection
  72. Konus-Wind observation of GRB 130515A
  73. GRB 130514B: Swift-XRT Observations
  74. GRB 130515A: Swift detection of a short burst
  75. GRB 130514A: Swift-XRT refined Analysis
  76. GRB 130427A: optical observations
  77. GRB 130514A: RATIR Optical and NIR Observations
  78. GRB 130514B: a long GRB detected by INTEGRAL
  79. GRB 130514A: Swift-BAT refined analysis
  80. GRB 130514A: Swift detection of a burst
  81. GRB 130513A: a long GRB detected by INTEGRAL
  82. GRB 130511A: Swift-XRT refined Analysis
  83. GRB 130511A: Swift detection of a burst with an optical counterpart
  84. GRB 130508A: Refined Swift-XRT analysis: Correction to GCN 14612
  85. Fermi Trigger 130507.091 - Detection of a SGR-like Burst
  86. GRB 130505B: Further Swift observations
  87. Refined IPN Triangulation of GRB 130502B
  88. Konus-Wind observation of GRB 130504C
  89. GRB 130505B: MAXI/GSC detection
  90. GRB 130505A: optical observations
  91. GRB 130502A: optical upper limit
  92. GRB 130427A: correction to GCN 14487
  93. GRB 130505A: correction to GCN 14575
  94. GRB 130505A: Swift-XRT refined Analysis
  95. Konus-Wind observation of GRB 130505A
  96. GRB 130504C: Fermi-LAT detection of a burst
  97. GRB 130505A: MAXI/GSC detection
  98. Konus-Wind observation of GRB 130504B
  99. GRB 130505A: Swift detection of a burst with optical afterglow
  100. IPN Triangulation of GRB 130504B

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