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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"

45628 results found.

  1. Swift/UVOT Upper Limits for GRB061110b
  2. Swift/UVOT Upper Limits for GRB061110a
  3. GRB 061110A - VLT tentative redshift
  4. GRB 061110B: Swift XRT refined analysis
  5. GRB 061110B, Swift-BAT refined analysis
  6. GRB 061110B: VLT redshift
  7. GRB061110B: Optical observations at Crni Vrh
  8. GRB 061110B: NOT optical observations
  9. GRB 061110A: Swift XRT refined analysis
  10. GRB 061110B: Swift/XRT position
  11. GRB 061110B : Liverpool Telescope Optical Afterglow Detection
  12. GRB 061110B: Swift-UVOT Initial Observation
  13. GRB 061110A, Swift-BAT refined analysis
  14. GRB 061110B: TAROT Calern observatory optical observations
  15. GRB 061110B: Swift detection of a burst
  16. GRB 061110: NOT observations
  17. GRB 061110: Candidate confirmed
  18. GRB 061110 : Optical afterglow candidate
  19. GRB 061110: ROTSE-III Optical Limits
  20. GRB 061110: Swift detection of a burst
  21. GRB061110A - Optical Non-detection
  22. Swift-BAT Trigger 237821 is a Cosmic Ray Shower event
  23. GRB 061109: optical observation
  24. GRB 061109: TAROT Calern observatory optical observations
  25. GRB 061109: Swift detection of a possible burst
  26. GRB061028: MAGIC telescope GeV observation
  27. GRB 061027: TAROT La Silla observatory optical observations
  28. GRB 061007: Third Epoch ATCA Radio Observations
  29. GRB061019: second epoch CrAO observations
  30. GRB 061028: Swift/XRT Astrometry Correction
  31. GRB 061102: Swift/UVOT Magnitude Upper Limits
  32. GRB 061102, XRT refined analysis
  33. GRB 061004: Further VLT/NTT observations
  34. Swift-BAT Trigger 236481 is a Cosmic Ray Shower event
  35. GRB061102B: Super-LOTIS observations
  36. GRB 061028: Optical R passband observations
  37. GRB 061102B: Swift detection of a possible burst
  38. GRB 061102, Swift-BAT refined analysis
  39. GRB 061102: Swift detection of a burst
  40. GRB 061028: VLA Observation
  41. GRB 061004: Swift/XRT Astrometry Correction
  42. GRB 060801: Swift/XRT Astrometry Correction
  43. GRB 061028: Futher P200 Observations
  44. GRB 061028: MDM Observations
  45. GRB 061028: P200 Observations
  46. GRB 061028: SARA upper limit
  47. GRB 061028: z band imaging
  48. GRB061028: XRT refined analysis
  49. GRB 061028: Swift/UVOT Observations
  50. GRB 061028, Swift-BAT refined analysis
  51. GRB 061028: TAROT Calern observatory late optical observations
  52. GRB 061028: TAROT Calern observatory optical observations
  53. GRB 061028: Swift detection of a burst
  54. GRB 061027, Swift refined analysis of a possible burst
  55. GRB 061027: Swift detection of a possible burst
  56. GRB061025: ROTSE-III Confirmation of Optical Counterpart
  57. GRB061025: Swift XRT refined analysis
  58. GRB061025: Swift/UVOT observations
  59. GRB 061019: MITSuME upper limits
  60. GRB 061025: REM observations
  61. GRB 061025: Gemini-S observations
  62. GRB061025: Swift XRT position
  63. GRB 061025: ROTSE-III Optical Limits
  64. GRB 061025: a long GRB detected by INTEGRAL
  65. Swift XRT boresight update
  66. GRB 061021, Swift-BAT Lag analysis
  67. Konus-Wind observation of GRB 061021
  68. GRB 061021 - VLT spectrum without lines
  69. GRB 061021: Swift-XRT refined analysis
  70. GRB 061021: Swift/UVOT Observation
  71. GRB 061021, Swift-BAT refined analysis
  72. GRB 061021: Swift detection of a burst
  73. GRB 061019: Super-LOTIS upper limit
  74. GRB060904b: optical observations
  75. GRB061019: optical observations
  76. GRB061019: optical observations
  77. GRB 061019: SARA upper limit
  78. GRB 061019: dust-scattered X-ray halo detected in Swift/XRT
  79. GRB 060930: MARGE Optical Limits
  80. GRB 061019: Swift/UVOT upper limit
  81. GRB 061019: SMARTS afterglow confirmation
  82. GRB061019: Swift XRT refined analysis
  83. GRB 061019, Swift-BAT refined analysis
  84. GRB 061019: TAROT La Silla observatory optical observations
  85. GRB 061019: REM K-band candidate afterglow
  86. GRB061019: Swift/XRT position
  87. GRB 061019: Swift-BAT detection of a burst
  88. GRB 060825: GORT Observations
  89. GRB 061007: Second Epoch ATCA Radio Observations
  90. GRB 061007: RHESSI Spectral Fit
  91. GRB 061007: Suzaku/WAM observation of the prompt emission
  92. GRB 061006: astrometry-corrected XRT position
  93. Konus-Wind observation of GRB 061007
  94. GRB 060928: Confirmation of the X-ray afterglow detected by Swift
  95. GRB 061007: ATCA Radio Observations
  96. GRB061007: Swift UVOT followup observations
  97. GRB 061006: optical afterglow
  98. GRB 061006 : Suzaku/WAM observation of the prompt emission
  99. GRB 061007: OA fading and VLT redshift
  100. GRB 061007: Magellan Spectroscopy

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