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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"

32772 results found.

  1. GRB 061121 declared "Burst of Interest" by Swift team
  2. RHESSI Spectrum of GRB061121
  3. Konus-Wind and Konus-A observations of GRB 061121
  4. INTEGRAL results on GRB 061122
  5. GRB 061121: Swift/UVOT Observations
  6. GRB 061121: Swift-XRT Team Refined Analysis
  7. GRB 061121, Swift-BAT refined analysis
  8. GRB061121, optical observation
  9. GRB 061121: Optical observation at the KANATA 1.5m telescope
  10. GRB 061121: Faulkes Telescope North Optical Observation
  11. GRB061121: Spectroscopic Redshift
  12. GRB 061121: ROTSE-III Confirmation of Optical Counterpart
  13. GRB 060605: NIR Observations
  14. GRB 050915B: optical afterglow
  15. GRB 060111B: Swift UVOT Refined Magnitudes
  16. GRB061110A: Correction to GCN5817
  17. GRB 061110A: refined R-band analysis
  18. GRB 061110B: NIR Observations
  19. Swift/UVOT Upper Limits for GRB061110b
  20. Swift/UVOT Upper Limits for GRB061110a
  21. GRB 061110B: Swift XRT refined analysis
  22. GRB 061110B, Swift-BAT refined analysis
  23. GRB 061110B: VLT redshift
  24. GRB 061110B: NOT optical observations
  25. GRB 061110A: Swift XRT refined analysis
  26. GRB 061110B: Swift/XRT position
  27. GRB 061110B : Liverpool Telescope Optical Afterglow Detection
  28. GRB 061110A, Swift-BAT refined analysis
  29. GRB 061110: ROTSE-III Optical Limits
  30. Swift-BAT Trigger 237821 is a Cosmic Ray Shower event
  31. GRB 061109: optical observation
  32. GRB061028: MAGIC telescope GeV observation
  33. GRB 061007: Third Epoch ATCA Radio Observations
  34. GRB061019: second epoch CrAO observations
  35. GRB 061028: Swift/XRT Astrometry Correction
  36. GRB 061102: Swift/UVOT Magnitude Upper Limits
  37. GRB 061102, XRT refined analysis
  38. GRB 061004: Further VLT/NTT observations
  39. Swift-BAT Trigger 236481 is a Cosmic Ray Shower event
  40. GRB061102B: Super-LOTIS observations
  41. GRB 061028: Optical R passband observations
  42. GRB 061102, Swift-BAT refined analysis
  43. GRB 061028: VLA Observation
  44. GRB 061004: Swift/XRT Astrometry Correction
  45. GRB 060801: Swift/XRT Astrometry Correction
  46. GRB 061028: Futher P200 Observations
  47. GRB 061028: MDM Observations
  48. GRB 061028: P200 Observations
  49. GRB 061028: SARA upper limit
  50. GRB 061028: z band imaging
  51. GRB061028: XRT refined analysis
  52. GRB 061028: Swift/UVOT Observations
  53. GRB 061028, Swift-BAT refined analysis
  54. GRB 061027, Swift refined analysis of a possible burst
  55. GRB061025: ROTSE-III Confirmation of Optical Counterpart
  56. GRB061025: Swift XRT refined analysis
  57. GRB061025: Swift/UVOT observations
  58. GRB 061019: MITSuME upper limits
  59. GRB 061025: REM observations
  60. GRB 061025: Gemini-S observations
  61. GRB061025: Swift XRT position
  62. GRB 061025: ROTSE-III Optical Limits
  63. Swift XRT boresight update
  64. GRB 061021, Swift-BAT Lag analysis
  65. Konus-Wind observation of GRB 061021
  66. GRB 061021 - VLT spectrum without lines
  67. GRB 061021: Swift-XRT refined analysis
  68. GRB 061021: Swift/UVOT Observation
  69. GRB 061021, Swift-BAT refined analysis
  70. GRB 061019: Super-LOTIS upper limit
  71. GRB060904b: optical observations
  72. GRB061019: optical observations
  73. GRB061019: optical observations
  74. GRB 061019: SARA upper limit
  75. GRB 060930: MARGE Optical Limits
  76. GRB 061019: Swift/UVOT upper limit
  77. GRB 061019: SMARTS afterglow confirmation
  78. GRB061019: Swift XRT refined analysis
  79. GRB 061019, Swift-BAT refined analysis
  80. GRB 061019: REM K-band candidate afterglow
  81. GRB061019: Swift/XRT position
  82. GRB 060825: GORT Observations
  83. GRB 061007: Second Epoch ATCA Radio Observations
  84. GRB 061007: RHESSI Spectral Fit
  85. GRB 061007: Suzaku/WAM observation of the prompt emission
  86. GRB 061006: astrometry-corrected XRT position
  87. Konus-Wind observation of GRB 061007
  88. GRB 060928: Confirmation of the X-ray afterglow detected by Swift
  89. GRB 061007: ATCA Radio Observations
  90. GRB061007: Swift UVOT followup observations
  91. GRB 061006: optical afterglow
  92. GRB 061007: OA fading and VLT redshift
  93. GRB 061007: Magellan Spectroscopy
  94. GRB 061007: Correction to GCN 5712
  95. GRB 061007: Swift-BAT refined analysis
  96. GRB 061007: Swift XRT refined analysis
  97. GRB 061006: Swift/UVOT optical observations
  98. Konus-Wind observation of the short hard GRB 061006
  99. GRB 061007 - FTS early brightening and power law decay
  100. GRB 061007 - Faulkes Telescope South Afterglow Confirmation

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