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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"

32721 results found.

  1. GRB 061028: Swift/UVOT Observations
  2. GRB 061028, Swift-BAT refined analysis
  3. GRB 061027, Swift refined analysis of a possible burst
  4. GRB061025: ROTSE-III Confirmation of Optical Counterpart
  5. GRB061025: Swift XRT refined analysis
  6. GRB061025: Swift/UVOT observations
  7. GRB 061019: MITSuME upper limits
  8. GRB 061025: REM observations
  9. GRB 061025: Gemini-S observations
  10. GRB061025: Swift XRT position
  11. GRB 061025: ROTSE-III Optical Limits
  12. Swift XRT boresight update
  13. GRB 061021, Swift-BAT Lag analysis
  14. Konus-Wind observation of GRB 061021
  15. GRB 061021 - VLT spectrum without lines
  16. GRB 061021: Swift-XRT refined analysis
  17. GRB 061021: Swift/UVOT Observation
  18. GRB 061021, Swift-BAT refined analysis
  19. GRB 061019: Super-LOTIS upper limit
  20. GRB060904b: optical observations
  21. GRB061019: optical observations
  22. GRB061019: optical observations
  23. GRB 061019: SARA upper limit
  24. GRB 060930: MARGE Optical Limits
  25. GRB 061019: Swift/UVOT upper limit
  26. GRB 061019: SMARTS afterglow confirmation
  27. GRB061019: Swift XRT refined analysis
  28. GRB 061019, Swift-BAT refined analysis
  29. GRB 061019: REM K-band candidate afterglow
  30. GRB061019: Swift/XRT position
  31. GRB 060825: GORT Observations
  32. GRB 061007: Second Epoch ATCA Radio Observations
  33. GRB 061007: RHESSI Spectral Fit
  34. GRB 061007: Suzaku/WAM observation of the prompt emission
  35. GRB 061006: astrometry-corrected XRT position
  36. Konus-Wind observation of GRB 061007
  37. GRB 060928: Confirmation of the X-ray afterglow detected by Swift
  38. GRB 061007: ATCA Radio Observations
  39. GRB061007: Swift UVOT followup observations
  40. GRB 061006: optical afterglow
  41. GRB 061007: OA fading and VLT redshift
  42. GRB 061007: Magellan Spectroscopy
  43. GRB 061007: Correction to GCN 5712
  44. GRB 061007: Swift-BAT refined analysis
  45. GRB 061007: Swift XRT refined analysis
  46. GRB 061006: Swift/UVOT optical observations
  47. Konus-Wind observation of the short hard GRB 061006
  48. GRB 061007 - FTS early brightening and power law decay
  49. GRB 061007 - Faulkes Telescope South Afterglow Confirmation
  50. GRB 061007: ROTSE-III Detection of Optical Counterpart
  51. GRB 061006: VLT observation
  52. GRB 061006: Swift-BAT refined analysis of the short-hard burst
  53. GRB 061006: Swift-XRT Team Refined Analysis
  54. GRB061006 (Swift 232585) might be a short-hard GRB
  55. GRB061006: Faulkes Telescope South Observations
  56. GRB 061004: Optical afterglow candidate and redshift
  57. GRB 061004: Las Campanas Optical/NIR Observations
  58. GRB061004: Swift/UVOT optical observations
  59. GRB 061004: Swift-XRT Team Refined Analysis
  60. GRB 061004, Swift BAT refined analysis
  61. GRB 061004: Nearby 2MASS Galaxy
  62. GRB 060928: Correction to GCN 5690
  63. Konus-Wind observation of GRB 060928
  64. GRB 060928: Suzaku/WAM observation of the prompt emission
  65. GRB 060928: Swift observations
  66. GRB 060928: RHESSI Spectral Fit
  67. IPN triangulation of GRB060928 (long, exceptionally bright)
  68. GRB061002: Swift UVOT followup observations
  69. GRB 060930: near-IR afterglow candidate
  70. GRB 061002: Swift-XRT Team Refined Analysis
  71. VLA observations of GRB 060926
  72. GRB 061002, Swift-BAT refined analysis
  73. GRB 060908: Detection of a possible host
  74. GRB 060923A: Probable host galaxy in the R-band
  75. GRB 060807: Detection of a possible host galaxy
  76. GRB 060923A: VLA K-band Observations
  77. GRB060930: Faulkes Telescope South observation
  78. GRB 060929: Further XRT Refined Analysis
  79. GRB 060929: Swift/UVOT Optical Observations
  80. GRB 060930: ROTSE-III Optical Limits
  81. GRB 060927 : GAO 150cm telescope optical observation
  82. GRB060929: Swift-XRT refined analysis.
  83. GRB 060929, Swift-BAT further refined analysis - late-time flare
  84. GRB 060929: TNG K-band observations
  85. GRB 060929, Swift-BAT refined analysis
  86. GRB060929: Optical limit
  87. GRB 060929: BART observation
  88. GRB 060929: BOOTES-IR & OSN observations
  89. GRB060908: optical observations
  90. GRB 060729: An update on the late-time Swift observations
  91. GRB060923C: optical limit
  92. GRB060927: optical observations
  93. test of new software, grb
  94. GRB 060926: Swift-UVOT UVW1 Detection Retraction
  95. GRB 060927: Swift/UVOT Optical Observations
  96. GRB 060927: Early color
  97. GRB 060927: Swift XRT Team refined analysis
  98. GRB 060927 optical limit
  99. GRB 060927, Swift-BAT refined analysis
  100. GRB060926: improved redshift

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