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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"

19290 results found.

  1. GRB 061019: TAROT La Silla observatory optical observations
  2. GRB 061007: Second Epoch ATCA Radio Observations
  3. GRB 061007: Suzaku/WAM observation of the prompt emission
  4. GRB 060928: Confirmation of the X-ray afterglow detected by Swift
  5. GRB 061007: ATCA Radio Observations
  6. GRB 061007: Correction to GCN 5712
  7. GRB 061007: Swift-BAT refined analysis
  8. GRB 061007: Swift XRT refined analysis
  9. GRB 061007: Swift detection of a burst with an optical counterpart
  10. GRB 061007: ROTSE-III Detection of Optical Counterpart
  11. GRB 061006: Swift-BAT refined analysis of the short-hard burst
  12. GRB 061006: Swift-XRT Team Refined Analysis
  13. GRB061006 (Swift 232585) might be a short-hard GRB
  14. GRB 061004: Swift-XRT Team Refined Analysis
  15. GRB 061004, Swift BAT refined analysis
  16. GRB 060928: Suzaku/WAM observation of the prompt emission
  17. GRB 060928: Swift observations
  18. GRB 060930: near-IR afterglow candidate
  19. GRB 061002: Swift-XRT Team Refined Analysis
  20. GRB 061002, Swift-BAT refined analysis
  21. GRB 060929: Further XRT Refined Analysis
  22. GRB 060930: A long X-ray rich GRB detected by INTEGRAL
  23. GRB060929: Swift-XRT refined analysis.
  24. GRB 060929, Swift-BAT refined analysis
  25. GRB 060927: Swift XRT Team refined analysis
  26. GRB 060927, Swift-BAT refined analysis
  27. GRB 060927, optical observation
  28. Swift XRT boresight
  29. GRB060926: VLT redshift
  30. GRB 060923A: Schedule of Spitzer Space Telescope Observations
  31. GRB 060926, Swift-BAT refined analysis
  32. GRB 060926: RTT150, UVOT afterglow candidate confirmation
  33. GRB 060926: Swift detection of a burst
  34. GRB 060923C, Swift-BAT refined analysis
  35. GRB 060923C: NIR afterglow confirmed
  36. GRB 060923A: Gemini Second Epoch and Afterglow Confirmation
  37. GRB 060923B: Swift XRT Refined Analysis
  38. GRB 060923A: Swift XRT refined analysis
  39. GRB 060923A: Keck and Gemini Observations
  40. GRB 060923B, Swift-BAT refined analysis
  41. GRB 060923, Swift-BAT refined analysis
  42. Swift detects a hard X-ray burst from AXP CXOU J164710.2-455216
  43. GRB 060919, Swift-BAT refined analysis
  44. GRB060919: XRT refined analysis
  45. GRB 060919: Swift detection of a burst
  46. GRB 060912B: a long GRB detected with INTEGRAL
  47. GRB 060912, Swift-BAT refined analysis
  48. GRB 060912: Swift detection of a burst with an optical afterglow
  49. GRB060906: Danish/DFOSC optical observations
  50. GRB 060908, Swift-BAT refined analysis
  51. GRB 060908 - SDSS Pre-burst Observations
  52. GRB 060908: REM optical prompt observation
  53. GRB 060908: Swift detection of a burst with a bright optical counterpart
  54. GRB 060904A: Suzaku/WAM observation of the prompt emission
  55. GRB060906 , optical observation
  56. GRB 060906, Swift-BAT refined spectral analysis
  57. GRB 060906: Swift/XRT Refined Analysis
  58. VLT redshift of GRB 060906
  59. GRB 060906, Swift-BAT refined analysis
  60. GRB 060904A Milagro GeV/TeV Observations
  61. GRB060904b, optical observations
  62. GRB 060904A: Subaru NIR observation
  63. GRB 060904B: Swift-BAT refined analysis
  64. GRB 060904B: Swift-XRT refined analysis
  65. GRB 060904A: Refined analysis of the Swift-BAT burst
  66. GRB 060904B: Optical observations at Crni Vrh
  67. GRB060904B - SDSS Pre-Burst Observations
  68. GRB 060904B: Swift detection of a burst with optical counterpart
  69. GRB060904 - SDSS Pre-Burst Observations
  70. GRB060901: Optical observations
  71. GRB 060901: Swift/XRT Refined Analysis
  72. GRB 060901: Swift/XRT Position
  73. GRB 060901: further INTEGRAL results
  74. GRB 060901: a long GRB detected by INTEGRAL
  75. Two bright bursts from SGR 1806-20 detected with IBAS
  76. GRB 060814: Suzaku/WAM observation of the prompt emission
  77. GRB060826 - SDSS Pre-Burst Observations
  78. GRB 060825: XRT Team Refined Analysis
  79. GRB 060825: Swift-BAT Refined Analysis
  80. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  81. GRB 060825: Swift detection of a burst
  82. GRB060801: host galaxy redshift
  83. GRB060729: analysis of XMM-Newton observation
  84. GRB 060813: A long, bright GRB detected with Suzaku WAM
  85. Konus-Wind observation of GRB 060814
  86. GRB 060814: Refined analysis of the Swift-BAT burst
  87. GRB 060814: Possible IR counterpart
  88. GRB060805B: optical observations
  89. GRB 060814: Swift XRT refined analysis
  90. Konus-Wind observation of GRB 060813
  91. GRB 060813: Swift XRT refined analysis
  92. GRB 060813: Refined analysis of the Swift-BAT burst
  93. GRB 060813: Swift detection of a burst
  94. GRB060807: Possible Highly Significant X-ray Emission Lines
  95. GRB 060729: An update on the Swift XRT and UVOT observations
  96. GRB060807: Optical limiting magnitudes
  97. GRB 060805B: XRT Team Analysis
  98. GRB060806 is similar to previous activity of SGR1806-20
  99. GRB 060807: XRT Team refined analysis
  100. GRB 060807: Refined analysis of the Swift-BAT burst

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