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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"

32693 results found.

  1. GRB 061126 : SDSS Pre-Burst Observations
  2. GRB 061126: Swift-XRT refined analysis
  3. GRB 061126: Swift/UVOT Observations
  4. GRB 061126, Swift-BAT refined analysis
  5. GRB 061126: SARA Observations
  6. GRB 061126: Early Detection of the IR Afterglow
  7. GRB 061126: Faulkes Telescope North Optical Observations
  8. GRB 061121: MDM Continued Monitoring
  9. GRB 061122: Confirmation of X-ray/Optical Afterglow
  10. GRB 061121: MDM Continuing Optical Decay
  11. GRB061121: optical observations
  12. GRB 061122: Candidate Optical Afterglow
  13. GRB 061121: Ep,i - Eiso correlation
  14. GRB 061121: MDM Optical Decay
  15. GRB061122: Swift/UVOT Optical Observations
  16. GRB 061121: ART detection in Ic
  17. GRB061121: P60 Observations
  18. Radio detection of GRB 061121
  19. GRB061122: Swift-XRT position
  20. Konus-Wind observation of GRB 061122
  21. GRB 061121: MDM Optical Observations
  22. GRB 061121 declared "Burst of Interest" by Swift team
  23. RHESSI Spectrum of GRB061121
  24. Konus-Wind and Konus-A observations of GRB 061121
  25. INTEGRAL results on GRB 061122
  26. GRB 061121: Swift/UVOT Observations
  27. GRB 061121: Swift-XRT Team Refined Analysis
  28. GRB 061121, Swift-BAT refined analysis
  29. GRB061121, optical observation
  30. GRB 061121: Optical observation at the KANATA 1.5m telescope
  31. GRB 061121: Faulkes Telescope North Optical Observation
  32. GRB061121: Spectroscopic Redshift
  33. GRB 061121: ROTSE-III Confirmation of Optical Counterpart
  34. GRB 060605: NIR Observations
  35. GRB 050915B: optical afterglow
  36. GRB 060111B: Swift UVOT Refined Magnitudes
  37. GRB061110A: Correction to GCN5817
  38. GRB 061110A: refined R-band analysis
  39. GRB 061110B: NIR Observations
  40. Swift/UVOT Upper Limits for GRB061110b
  41. Swift/UVOT Upper Limits for GRB061110a
  42. GRB 061110B: Swift XRT refined analysis
  43. GRB 061110B, Swift-BAT refined analysis
  44. GRB 061110B: VLT redshift
  45. GRB 061110B: NOT optical observations
  46. GRB 061110A: Swift XRT refined analysis
  47. GRB 061110B: Swift/XRT position
  48. GRB 061110B : Liverpool Telescope Optical Afterglow Detection
  49. GRB 061110A, Swift-BAT refined analysis
  50. GRB 061110: ROTSE-III Optical Limits
  51. Swift-BAT Trigger 237821 is a Cosmic Ray Shower event
  52. GRB 061109: optical observation
  53. GRB061028: MAGIC telescope GeV observation
  54. GRB 061007: Third Epoch ATCA Radio Observations
  55. GRB061019: second epoch CrAO observations
  56. GRB 061028: Swift/XRT Astrometry Correction
  57. GRB 061102: Swift/UVOT Magnitude Upper Limits
  58. GRB 061102, XRT refined analysis
  59. GRB 061004: Further VLT/NTT observations
  60. Swift-BAT Trigger 236481 is a Cosmic Ray Shower event
  61. GRB061102B: Super-LOTIS observations
  62. GRB 061028: Optical R passband observations
  63. GRB 061102, Swift-BAT refined analysis
  64. GRB 061028: VLA Observation
  65. GRB 061004: Swift/XRT Astrometry Correction
  66. GRB 060801: Swift/XRT Astrometry Correction
  67. GRB 061028: Futher P200 Observations
  68. GRB 061028: MDM Observations
  69. GRB 061028: P200 Observations
  70. GRB 061028: SARA upper limit
  71. GRB 061028: z band imaging
  72. GRB061028: XRT refined analysis
  73. GRB 061028: Swift/UVOT Observations
  74. GRB 061028, Swift-BAT refined analysis
  75. GRB 061027, Swift refined analysis of a possible burst
  76. GRB061025: ROTSE-III Confirmation of Optical Counterpart
  77. GRB061025: Swift XRT refined analysis
  78. GRB061025: Swift/UVOT observations
  79. GRB 061019: MITSuME upper limits
  80. GRB 061025: REM observations
  81. GRB 061025: Gemini-S observations
  82. GRB061025: Swift XRT position
  83. GRB 061025: ROTSE-III Optical Limits
  84. Swift XRT boresight update
  85. GRB 061021, Swift-BAT Lag analysis
  86. Konus-Wind observation of GRB 061021
  87. GRB 061021 - VLT spectrum without lines
  88. GRB 061021: Swift-XRT refined analysis
  89. GRB 061021: Swift/UVOT Observation
  90. GRB 061021, Swift-BAT refined analysis
  91. GRB 061019: Super-LOTIS upper limit
  92. GRB060904b: optical observations
  93. GRB061019: optical observations
  94. GRB061019: optical observations
  95. GRB 061019: SARA upper limit
  96. GRB 060930: MARGE Optical Limits
  97. GRB 061019: Swift/UVOT upper limit
  98. GRB 061019: SMARTS afterglow confirmation
  99. GRB061019: Swift XRT refined analysis
  100. GRB 061019, Swift-BAT refined analysis

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