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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"

19294 results found.

  1. GRB061019: optical observations
  2. GRB 061019: SMARTS afterglow confirmation
  3. GRB061019: Swift XRT refined analysis
  4. GRB 061019, Swift-BAT refined analysis
  5. GRB 061019: TAROT La Silla observatory optical observations
  6. GRB 061007: Second Epoch ATCA Radio Observations
  7. GRB 061007: Suzaku/WAM observation of the prompt emission
  8. GRB 060928: Confirmation of the X-ray afterglow detected by Swift
  9. GRB 061007: ATCA Radio Observations
  10. GRB 061007: Correction to GCN 5712
  11. GRB 061007: Swift-BAT refined analysis
  12. GRB 061007: Swift XRT refined analysis
  13. GRB 061007: Swift detection of a burst with an optical counterpart
  14. GRB 061007: ROTSE-III Detection of Optical Counterpart
  15. GRB 061006: Swift-BAT refined analysis of the short-hard burst
  16. GRB 061006: Swift-XRT Team Refined Analysis
  17. GRB061006 (Swift 232585) might be a short-hard GRB
  18. GRB 061004: Swift-XRT Team Refined Analysis
  19. GRB 061004, Swift BAT refined analysis
  20. GRB 060928: Suzaku/WAM observation of the prompt emission
  21. GRB 060928: Swift observations
  22. GRB 060930: near-IR afterglow candidate
  23. GRB 061002: Swift-XRT Team Refined Analysis
  24. GRB 061002, Swift-BAT refined analysis
  25. GRB 060929: Further XRT Refined Analysis
  26. GRB 060930: A long X-ray rich GRB detected by INTEGRAL
  27. GRB060929: Swift-XRT refined analysis.
  28. GRB 060929, Swift-BAT refined analysis
  29. GRB 060927: Swift XRT Team refined analysis
  30. GRB 060927, Swift-BAT refined analysis
  31. GRB 060927, optical observation
  32. Swift XRT boresight
  33. GRB060926: VLT redshift
  34. GRB 060923A: Schedule of Spitzer Space Telescope Observations
  35. GRB 060926, Swift-BAT refined analysis
  36. GRB 060926: RTT150, UVOT afterglow candidate confirmation
  37. GRB 060926: Swift detection of a burst
  38. GRB 060923C, Swift-BAT refined analysis
  39. GRB 060923C: NIR afterglow confirmed
  40. GRB 060923A: Gemini Second Epoch and Afterglow Confirmation
  41. GRB 060923B: Swift XRT Refined Analysis
  42. GRB 060923A: Swift XRT refined analysis
  43. GRB 060923A: Keck and Gemini Observations
  44. GRB 060923B, Swift-BAT refined analysis
  45. GRB 060923, Swift-BAT refined analysis
  46. Swift detects a hard X-ray burst from AXP CXOU J164710.2-455216
  47. GRB 060919, Swift-BAT refined analysis
  48. GRB060919: XRT refined analysis
  49. GRB 060919: Swift detection of a burst
  50. GRB 060912B: a long GRB detected with INTEGRAL
  51. GRB 060912, Swift-BAT refined analysis
  52. GRB 060912: Swift detection of a burst with an optical afterglow
  53. GRB060906: Danish/DFOSC optical observations
  54. GRB 060908, Swift-BAT refined analysis
  55. GRB 060908 - SDSS Pre-burst Observations
  56. GRB 060908: REM optical prompt observation
  57. GRB 060908: Swift detection of a burst with a bright optical counterpart
  58. GRB 060904A: Suzaku/WAM observation of the prompt emission
  59. GRB060906 , optical observation
  60. GRB 060906, Swift-BAT refined spectral analysis
  61. GRB 060906: Swift/XRT Refined Analysis
  62. VLT redshift of GRB 060906
  63. GRB 060906, Swift-BAT refined analysis
  64. GRB 060904A Milagro GeV/TeV Observations
  65. GRB060904b, optical observations
  66. GRB 060904A: Subaru NIR observation
  67. GRB 060904B: Swift-BAT refined analysis
  68. GRB 060904B: Swift-XRT refined analysis
  69. GRB 060904A: Refined analysis of the Swift-BAT burst
  70. GRB 060904B: Optical observations at Crni Vrh
  71. GRB060904B - SDSS Pre-Burst Observations
  72. GRB 060904B: Swift detection of a burst with optical counterpart
  73. GRB060904 - SDSS Pre-Burst Observations
  74. GRB060901: Optical observations
  75. GRB 060901: Swift/XRT Refined Analysis
  76. GRB 060901: Swift/XRT Position
  77. GRB 060901: further INTEGRAL results
  78. GRB 060901: a long GRB detected by INTEGRAL
  79. Two bright bursts from SGR 1806-20 detected with IBAS
  80. GRB 060814: Suzaku/WAM observation of the prompt emission
  81. GRB060826 - SDSS Pre-Burst Observations
  82. GRB 060825: XRT Team Refined Analysis
  83. GRB 060825: Swift-BAT Refined Analysis
  84. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  85. GRB 060825: Swift detection of a burst
  86. GRB060801: host galaxy redshift
  87. GRB060729: analysis of XMM-Newton observation
  88. GRB 060813: A long, bright GRB detected with Suzaku WAM
  89. Konus-Wind observation of GRB 060814
  90. GRB 060814: Refined analysis of the Swift-BAT burst
  91. GRB 060814: Possible IR counterpart
  92. GRB060805B: optical observations
  93. GRB 060814: Swift XRT refined analysis
  94. Konus-Wind observation of GRB 060813
  95. GRB 060813: Swift XRT refined analysis
  96. GRB 060813: Refined analysis of the Swift-BAT burst
  97. GRB 060813: Swift detection of a burst
  98. GRB060807: Possible Highly Significant X-ray Emission Lines
  99. GRB 060729: An update on the Swift XRT and UVOT observations
  100. GRB060807: Optical limiting magnitudes

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