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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"

32736 results found.

  1. GRB 061102, XRT refined analysis
  2. GRB 061004: Further VLT/NTT observations
  3. Swift-BAT Trigger 236481 is a Cosmic Ray Shower event
  4. GRB061102B: Super-LOTIS observations
  5. GRB 061028: Optical R passband observations
  6. GRB 061102, Swift-BAT refined analysis
  7. GRB 061028: VLA Observation
  8. GRB 061004: Swift/XRT Astrometry Correction
  9. GRB 060801: Swift/XRT Astrometry Correction
  10. GRB 061028: Futher P200 Observations
  11. GRB 061028: MDM Observations
  12. GRB 061028: P200 Observations
  13. GRB 061028: SARA upper limit
  14. GRB 061028: z band imaging
  15. GRB061028: XRT refined analysis
  16. GRB 061028: Swift/UVOT Observations
  17. GRB 061028, Swift-BAT refined analysis
  18. GRB 061027, Swift refined analysis of a possible burst
  19. GRB061025: ROTSE-III Confirmation of Optical Counterpart
  20. GRB061025: Swift XRT refined analysis
  21. GRB061025: Swift/UVOT observations
  22. GRB 061019: MITSuME upper limits
  23. GRB 061025: REM observations
  24. GRB 061025: Gemini-S observations
  25. GRB061025: Swift XRT position
  26. GRB 061025: ROTSE-III Optical Limits
  27. Swift XRT boresight update
  28. GRB 061021, Swift-BAT Lag analysis
  29. Konus-Wind observation of GRB 061021
  30. GRB 061021 - VLT spectrum without lines
  31. GRB 061021: Swift-XRT refined analysis
  32. GRB 061021: Swift/UVOT Observation
  33. GRB 061021, Swift-BAT refined analysis
  34. GRB 061019: Super-LOTIS upper limit
  35. GRB060904b: optical observations
  36. GRB061019: optical observations
  37. GRB061019: optical observations
  38. GRB 061019: SARA upper limit
  39. GRB 060930: MARGE Optical Limits
  40. GRB 061019: Swift/UVOT upper limit
  41. GRB 061019: SMARTS afterglow confirmation
  42. GRB061019: Swift XRT refined analysis
  43. GRB 061019, Swift-BAT refined analysis
  44. GRB 061019: REM K-band candidate afterglow
  45. GRB061019: Swift/XRT position
  46. GRB 060825: GORT Observations
  47. GRB 061007: Second Epoch ATCA Radio Observations
  48. GRB 061007: RHESSI Spectral Fit
  49. GRB 061007: Suzaku/WAM observation of the prompt emission
  50. GRB 061006: astrometry-corrected XRT position
  51. Konus-Wind observation of GRB 061007
  52. GRB 060928: Confirmation of the X-ray afterglow detected by Swift
  53. GRB 061007: ATCA Radio Observations
  54. GRB061007: Swift UVOT followup observations
  55. GRB 061006: optical afterglow
  56. GRB 061007: OA fading and VLT redshift
  57. GRB 061007: Magellan Spectroscopy
  58. GRB 061007: Correction to GCN 5712
  59. GRB 061007: Swift-BAT refined analysis
  60. GRB 061007: Swift XRT refined analysis
  61. GRB 061006: Swift/UVOT optical observations
  62. Konus-Wind observation of the short hard GRB 061006
  63. GRB 061007 - FTS early brightening and power law decay
  64. GRB 061007 - Faulkes Telescope South Afterglow Confirmation
  65. GRB 061007: ROTSE-III Detection of Optical Counterpart
  66. GRB 061006: VLT observation
  67. GRB 061006: Swift-BAT refined analysis of the short-hard burst
  68. GRB 061006: Swift-XRT Team Refined Analysis
  69. GRB061006 (Swift 232585) might be a short-hard GRB
  70. GRB061006: Faulkes Telescope South Observations
  71. GRB 061004: Optical afterglow candidate and redshift
  72. GRB 061004: Las Campanas Optical/NIR Observations
  73. GRB061004: Swift/UVOT optical observations
  74. GRB 061004: Swift-XRT Team Refined Analysis
  75. GRB 061004, Swift BAT refined analysis
  76. GRB 061004: Nearby 2MASS Galaxy
  77. GRB 060928: Correction to GCN 5690
  78. Konus-Wind observation of GRB 060928
  79. GRB 060928: Suzaku/WAM observation of the prompt emission
  80. GRB 060928: Swift observations
  81. GRB 060928: RHESSI Spectral Fit
  82. IPN triangulation of GRB060928 (long, exceptionally bright)
  83. GRB061002: Swift UVOT followup observations
  84. GRB 060930: near-IR afterglow candidate
  85. GRB 061002: Swift-XRT Team Refined Analysis
  86. VLA observations of GRB 060926
  87. GRB 061002, Swift-BAT refined analysis
  88. GRB 060908: Detection of a possible host
  89. GRB 060923A: Probable host galaxy in the R-band
  90. GRB 060807: Detection of a possible host galaxy
  91. GRB 060923A: VLA K-band Observations
  92. GRB060930: Faulkes Telescope South observation
  93. GRB 060929: Further XRT Refined Analysis
  94. GRB 060929: Swift/UVOT Optical Observations
  95. GRB 060930: ROTSE-III Optical Limits
  96. GRB 060927 : GAO 150cm telescope optical observation
  97. GRB060929: Swift-XRT refined analysis.
  98. GRB 060929, Swift-BAT further refined analysis - late-time flare
  99. GRB 060929: TNG K-band observations
  100. GRB 060929, Swift-BAT refined analysis

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