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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"

42868 results found.

  1. GRB 060912, Swift-BAT refined analysis
  2. GRB 060912: Correction to GCN 5559
  3. GRB 060912: Swift detection of a burst with an optical afterglow
  4. GRB060906: Danish/DFOSC optical observations
  5. VLA observations of GRB 060908
  6. GRB 060908: redshift
  7. GRB 060908, Swift/XRT refined analysis
  8. GRB 060908: Swift/UVOT Observations
  9. GRB 060908: Danish/DFOSC optical observations
  10. GRB 060908, Swift-BAT refined analysis
  11. GRB 060908 - SDSS Pre-burst Observations
  12. GRB 060904B : CFHT/WIRCam NIR afterglow observations
  13. GRB 060904B: Kiso Optical observation
  14. GRB 060904A : Optical limit
  15. GRB 060908: REM optical prompt observation
  16. GRB 060908: PROMPT Detection of a Bright Counterpart
  17. GRB 060908: Swift detection of a burst with a bright optical counterpart
  18. GRB 060904A: Suzaku/WAM observation of the prompt emission
  19. GRB060906 , optical observation
  20. GRB 060906: Early RAPTOR optical limits
  21. GRB 060906: Swift/XRT Refined Analysis
  22. GRB 060906: Swift-UVOT observations
  23. VLT redshift of GRB 060906
  24. GRB 060906, Swift-BAT refined analysis
  25. GRB 060906: FRAM observations - flash determination (airplane)
  26. GRB 060906: KAIT observations
  27. GRB 060906: Confirmation of P60 Optical Afterglow
  28. GRB 060906: observations with FRAM
  29. GRB 060906 (?): P60 Optical Afterglow Candidate
  30. GRB 060906: Swift detection of a probable burst
  31. GRB 060904A Milagro GeV/TeV Observations
  32. GRB060904b, optical observations
  33. GRB 060904b: SMARTS optical/IR afterglow observations
  34. GRB 060904B: RTT150 optical observations
  35. GRB 060904A: Subaru NIR observation
  36. GRB 060904B: Swift-BAT refined analysis
  37. GRB060904b: Optical observations with Swift/UVOT
  38. Konus-Wind observation of GRB 060904A
  39. GRB 060904B: Swift-XRT refined analysis
  40. GRB 060904A: Refined analysis of the Swift-BAT burst
  41. GRB 060904A: Swift-XRT refined analysis
  42. GRB 060904A: Suzaku-XIS and -HXD observation plan
  43. GRB 060904A: P60 Observations
  44. GRB 060904B: Optical observations at Crni Vrh
  45. GRB060904B: Watcher observations
  46. GRB 060904B BOOTES-IR and 1.5m OSN observations
  47. GRB 060904B: TAROT optical counterpart observations
  48. GRB060904B - SDSS Pre-Burst Observations
  49. GRB 060904: TAROT optical observations
  50. GRB 060904B: Swift detection of a burst with optical counterpart
  51. GRB060904 - SDSS Pre-Burst Observations
  52. GRB 060904: Swift detection of a bright burst
  53. GRB060901: Optical observations
  54. 060901: Swift UVOT followup observations
  55. Konus-Wind observation of GRB 060901
  56. GRB 060901: SMARTS optical/IR observations update
  57. GRB 060901: Swift/XRT Refined Analysis
  58. GRB 060901: SMARTS optical/IR observations
  59. GRB 060901: Swift/XRT Position
  60. GRB 060901: further INTEGRAL results
  61. GRB 060901: Watcher observations
  62. GRB 060901: a long GRB detected by INTEGRAL
  63. Two bright bursts from SGR 1806-20 detected with IBAS
  64. GRB 060605, observations using an Integral Field Unit
  65. GRB 060604: VLA Observation
  66. GRB 060814: Suzaku/WAM observation of the prompt emission
  67. GRB 060605: VLA Observation
  68. GRB 060707: VLA observation
  69. GRB 060825: VLA observations
  70. GRB060826 - SDSS Pre-Burst Observations
  71. GRB 060826(?): Swift detection of a possible burst
  72. GRB 060825: XRT Team Refined Analysis
  73. GRB 060825: Swift-BAT Refined Analysis
  74. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  75. GRB 060825: TNG optical observations
  76. GRB 060825: TAROT optical observations
  77. GRB 060825: P60 Observations
  78. GRB060825: BOOTES-IR optical observations
  79. GRB 060825: Swift detection of a burst
  80. GRB060801: host galaxy redshift
  81. GRB060729: analysis of XMM-Newton observation
  82. GRB 060814: pseudo-z from spectral parameters of the prompt
  83. IBAS Alerts No 3429 and 3430: not GRBs
  84. Radio observations of GRB 060719
  85. GRB 060729, SMARTS optical/IR observations
  86. GRB060814: Break in the XRT light curve
  87. GRB 060813: A long, bright GRB detected with Suzaku WAM
  88. GRB 060814: Confirmation of IR afterglow
  89. Konus-Wind observation of GRB 060814
  90. GRB 060814: Refined analysis of the Swift-BAT burst
  91. GRB 060814: P60 Observations
  92. GRB 060814: P200 NIR Observations
  93. GRB 060814: source inside revised XRT error box
  94. GRB060814: Swift/UVOT upper limits
  95. GRB 060814: Swift XRT refined analysis
  96. GRB 060814: VLT optical limits
  97. GRB 060814 - SDSS Pre-Burst Observations
  98. GRB 060814: TAROT optical observations
  99. GRB 060814: Swift detection of a bright burst
  100. Konus-Wind observation of GRB 060813

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