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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"

37676 results found.

  1. INTEGRAL results on GRB 061122
  2. Swift-BAT trigger 239987 is not a GRB
  3. GRB 061122A: a long GRB detected by INTEGRAL
  4. GRB 061121: Swift/UVOT Observations
  5. GRB 061121: Swift-XRT Team Refined Analysis
  6. GRB 061121, Swift-BAT refined analysis
  7. GRB 061121 : Planned XMM-Newton observation
  8. GRB 061121: Optical observation at the KANATA 1.5m telescope
  9. GRB 061121: Faulkes Telescope North Optical Observation
  10. GRB061121: Spectroscopic Redshift
  11. GRB 061121: ROTSE-III Confirmation of Optical Counterpart
  12. GRB 061121: Swift detection of a bright burst with an 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 TOO observations of GRB061110A
  20. Swift/UVOT Upper Limits for GRB061110b
  21. Swift/UVOT Upper Limits for GRB061110a
  22. GRB 061110A - VLT tentative redshift
  23. GRB 061110B: Swift XRT refined analysis
  24. GRB 061110B, Swift-BAT refined analysis
  25. GRB 061110B: VLT redshift
  26. GRB061110B: Optical observations at Crni Vrh
  27. GRB 061110B: NOT optical observations
  28. GRB 061110A: Swift XRT refined analysis
  29. GRB 061110B: Swift/XRT position
  30. GRB 061110B : Liverpool Telescope Optical Afterglow Detection
  31. GRB 061110B: Swift-UVOT Initial Observation
  32. GRB 061110A, Swift-BAT refined analysis
  33. GRB 061110B: TAROT Calern observatory optical observations
  34. GRB 061110B: Swift detection of a burst
  35. GRB 061110: NOT observations
  36. GRB 061110: Candidate confirmed
  37. GRB 061110 : Optical afterglow candidate
  38. GRB 061110: ROTSE-III Optical Limits
  39. GRB 061110: Swift detection of a burst
  40. Swift-BAT Trigger 237821 is a Cosmic Ray Shower event
  41. GRB 061109: optical observation
  42. GRB 061109: TAROT Calern observatory optical observations
  43. GRB 061109: Swift detection of a possible burst
  44. GRB061028: MAGIC telescope GeV observation
  45. GRB 061027: TAROT La Silla observatory optical observations
  46. GRB 061007: Third Epoch ATCA Radio Observations
  47. GRB061019: second epoch CrAO observations
  48. GRB 061028: Swift/XRT Astrometry Correction
  49. GRB 061102: Swift/UVOT Magnitude Upper Limits
  50. GRB 061102, XRT refined analysis
  51. GRB 061004: Further VLT/NTT observations
  52. Swift-BAT Trigger 236481 is a Cosmic Ray Shower event
  53. GRB061102B: Super-LOTIS observations
  54. GRB 061028: Optical R passband observations
  55. GRB 061102B: Swift detection of a possible burst
  56. GRB 061102, Swift-BAT refined analysis
  57. GRB 061102: Swift detection of a burst
  58. GRB 061028: VLA Observation
  59. GRB 061004: Swift/XRT Astrometry Correction
  60. GRB 060801: Swift/XRT Astrometry Correction
  61. GRB 061028: Futher P200 Observations
  62. GRB 061028: MDM Observations
  63. GRB 061028: P200 Observations
  64. GRB 061028: SARA upper limit
  65. GRB 061028: z band imaging
  66. GRB061028: XRT refined analysis
  67. GRB 061028: Swift/UVOT Observations
  68. GRB 061028, Swift-BAT refined analysis
  69. GRB 061028: TAROT Calern observatory late optical observations
  70. GRB 061028: TAROT Calern observatory optical observations
  71. GRB 061028: Swift detection of a burst
  72. GRB 061027, Swift refined analysis of a possible burst
  73. GRB 061027: Swift detection of a possible burst
  74. GRB061025: Swift/UVOT observations
  75. GRB 061019: MITSuME upper limits
  76. GRB 061025: REM observations
  77. GRB 061025: Gemini-S observations
  78. GRB061025: Swift XRT position
  79. GRB 061025: ROTSE-III Optical Limits
  80. GRB 061025: a long GRB detected by INTEGRAL
  81. GRB 061021, Swift-BAT Lag analysis
  82. Konus-Wind observation of GRB 061021
  83. GRB 061021 - VLT spectrum without lines
  84. GRB 061021: Swift-XRT refined analysis
  85. GRB 061021: Swift/UVOT Observation
  86. GRB 061021, Swift-BAT refined analysis
  87. GRB 061021: Swift detection of a burst
  88. GRB 061019: Super-LOTIS upper limit
  89. GRB060904b: optical observations
  90. GRB061019: optical observations
  91. GRB061019: optical observations
  92. GRB 061019: SARA upper limit
  93. GRB 061019: dust-scattered X-ray halo detected in Swift/XRT
  94. GRB 060930: MARGE Optical Limits
  95. GRB 061019: Swift/UVOT upper limit
  96. GRB 061019: SMARTS afterglow confirmation
  97. GRB061019: Swift XRT refined analysis
  98. GRB 061019, Swift-BAT refined analysis
  99. GRB 061019: TAROT La Silla observatory optical observations
  100. GRB 061019: REM K-band candidate afterglow

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