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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"

32740 results found.

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

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