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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"

23619 results found.

  1. Swift-BAT Trigger 237821 is a Cosmic Ray Shower event
  2. GRB 061109: TAROT Calern observatory optical observations
  3. GRB 061109: Swift detection of a possible burst
  4. GRB061028: MAGIC telescope GeV observation
  5. GRB 061027: TAROT La Silla observatory optical observations
  6. GRB 061007: Third Epoch ATCA Radio Observations
  7. Swift-BAT Trigger 236481 is a Cosmic Ray Shower event
  8. GRB 061028: Optical R passband observations
  9. GRB 061102B: Swift detection of a possible burst
  10. GRB 061102, Swift-BAT refined analysis
  11. GRB 061102: Swift detection of a burst
  12. GRB 061028: Futher P200 Observations
  13. GRB 061028: P200 Observations
  14. GRB 061028: SARA upper limit
  15. GRB 061028: z band imaging
  16. GRB 061028, Swift-BAT refined analysis
  17. GRB 061028: TAROT Calern observatory late optical observations
  18. GRB 061028: TAROT Calern observatory optical observations
  19. GRB 061028: Swift detection of a burst
  20. GRB 061027, Swift refined analysis of a possible burst
  21. GRB 061027: Swift detection of a possible burst
  22. GRB061025: Swift/UVOT observations
  23. Swift XRT boresight update
  24. Konus-Wind observation of GRB 061021
  25. GRB 061021, Swift-BAT refined analysis
  26. GRB 061021: Swift detection of a burst
  27. GRB 061019: Super-LOTIS upper limit
  28. GRB060904b: optical observations
  29. GRB 060930: MARGE Optical Limits
  30. GRB 061019, Swift-BAT refined analysis
  31. GRB 061019: TAROT La Silla observatory optical observations
  32. GRB 061019: Swift-BAT detection of a burst
  33. GRB 060825: GORT Observations
  34. GRB 061007: RHESSI Spectral Fit
  35. GRB 061007: Suzaku/WAM observation of the prompt emission
  36. GRB 061006: astrometry-corrected XRT position
  37. GRB 060928: Confirmation of the X-ray afterglow detected by Swift
  38. GRB 061006 : Suzaku/WAM observation of the prompt emission
  39. GRB 061007: Swift-BAT refined analysis
  40. Konus-Wind observation of the short hard GRB 061006
  41. GRB 061007 - FTS early brightening and power law decay
  42. GRB 061007 - Faulkes Telescope South Afterglow Confirmation
  43. GRB 061007: Swift detection of a burst with an optical counterpart
  44. GRB 061006: Swift-BAT refined analysis of the short-hard burst
  45. GRB 061006: Swift-XRT Team Refined Analysis
  46. GRB061006 (Swift 232585) might be a short-hard GRB
  47. GRB 060930: near-IR afterglow candidate retraction
  48. GRB 061006: Swift detection of a burst
  49. GRB 061004, Swift BAT refined analysis
  50. GRB 061004: Nearby 2MASS Galaxy
  51. GRB 061004: Swift detection of a burst
  52. GRB 060928: Suzaku/WAM observation of the prompt emission
  53. IGR J08408-4503 (= V* LM Vel): Swift detection of a transient
  54. GRB 060928: Swift observations
  55. GRB 060928: RHESSI Spectral Fit
  56. IPN triangulation of GRB060928 (long, exceptionally bright)
  57. GRB 060930: near-IR afterglow candidate
  58. GRB061002 - SDSS Pre-Burst Observations
  59. GRB 061002, Swift-BAT refined analysis
  60. GRB 061002: Swift detection of a burst: CORRECTED CONTENT
  61. GRB 061002: Swift detection of a burst
  62. GRB060930: Faulkes Telescope South observation
  63. GRB 060930: Xinglong TNT optical observations
  64. GRB 060930: A long X-ray rich GRB detected by INTEGRAL
  65. GRB 060929: TNG K-band observations
  66. GRB 060929, Swift-BAT refined analysis
  67. GRB 060929: BART observation
  68. GRB 060929: Swift detection of a burst
  69. GRB060908: optical observations
  70. GRB 060729: An update on the late-time Swift observations
  71. GRB 060927: Swift XRT Team refined analysis
  72. GRB 060927, Swift-BAT refined analysis
  73. GRB060927: Faulkes Telescope South observation
  74. GRB 060926: MASTER: first minutes decay
  75. GRB060927 - SDSS Pre-Burst Observations
  76. Swift XRT boresight
  77. GRB 060927: Swift detection of a burst
  78. GRB 060926: OPTIMA-Burst -- further observations
  79. GRB 060926: Swift XRT refined analysis
  80. GRB 060926, Swift-BAT refined analysis
  81. GRB 060926: MASTER OT alert observation
  82. GRB 060926: RTT150, UVOT afterglow candidate confirmation
  83. GRB 060912A: Redshift of probable host galaxy
  84. GRB 060926: Watcher observations
  85. GRB060926 OPTIMA-Burst optical observation
  86. GRB 060926: Swift detection of a burst
  87. GRB 060923C, Swift-BAT refined analysis
  88. GRB060923B: Swift/UVOT upper limits
  89. GRB 060923B: Swift XRT Refined Analysis
  90. GRB 060923C: Swift XRT refined analysis
  91. GRB 060923C, Swift-BAT partial refined analysis
  92. GRB 060923A: Swift XRT refined analysis
  93. GRB 060923B, Swift-BAT refined analysis
  94. GRB060923C : Faulkes Telescope South optical limits
  95. GRB060923C: Faulkes Telescope North optical observations
  96. GRB 060923C: optical observation
  97. GRB 060923C: Swift detection of a burst
  98. GRB 060923B: Swift detection of a burst
  99. GRB 060923, Swift-BAT refined analysis
  100. GRB 060923: Early Super-LOTIS Observations

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