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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"

32767 results found.

  1. GRB061006: Faulkes Telescope South Observations
  2. GRB 061004: Optical afterglow candidate and redshift
  3. GRB 061004: Las Campanas Optical/NIR Observations
  4. GRB061004: Swift/UVOT optical observations
  5. GRB 061004: Swift-XRT Team Refined Analysis
  6. GRB 061004, Swift BAT refined analysis
  7. GRB 061004: Nearby 2MASS Galaxy
  8. GRB 060928: Correction to GCN 5690
  9. Konus-Wind observation of GRB 060928
  10. GRB 060928: Suzaku/WAM observation of the prompt emission
  11. GRB 060928: Swift observations
  12. GRB 060928: RHESSI Spectral Fit
  13. IPN triangulation of GRB060928 (long, exceptionally bright)
  14. GRB061002: Swift UVOT followup observations
  15. GRB 060930: near-IR afterglow candidate
  16. GRB 061002: Swift-XRT Team Refined Analysis
  17. VLA observations of GRB 060926
  18. GRB 061002, Swift-BAT refined analysis
  19. GRB 060908: Detection of a possible host
  20. GRB 060923A: Probable host galaxy in the R-band
  21. GRB 060807: Detection of a possible host galaxy
  22. GRB 060923A: VLA K-band Observations
  23. GRB060930: Faulkes Telescope South observation
  24. GRB 060929: Further XRT Refined Analysis
  25. GRB 060929: Swift/UVOT Optical Observations
  26. GRB 060930: ROTSE-III Optical Limits
  27. GRB 060927 : GAO 150cm telescope optical observation
  28. GRB060929: Swift-XRT refined analysis.
  29. GRB 060929, Swift-BAT further refined analysis - late-time flare
  30. GRB 060929: TNG K-band observations
  31. GRB 060929, Swift-BAT refined analysis
  32. GRB060929: Optical limit
  33. GRB 060929: BART observation
  34. GRB 060929: BOOTES-IR & OSN observations
  35. GRB060908: optical observations
  36. GRB 060729: An update on the late-time Swift observations
  37. GRB060923C: optical limit
  38. GRB060927: optical observations
  39. test of new software, grb
  40. GRB 060926: Swift-UVOT UVW1 Detection Retraction
  41. GRB 060927: Swift/UVOT Optical Observations
  42. GRB 060927: Early color
  43. GRB 060927: Swift XRT Team refined analysis
  44. GRB 060927 optical limit
  45. GRB 060927, Swift-BAT refined analysis
  46. GRB060926: improved redshift
  47. GRB 060927, optical observation
  48. GRB 060927: Possible host galaxy (star?) in the SDSS
  49. GRB060927: Faulkes Telescope South observation
  50. GRB 060926: MASTER: first minutes decay
  51. GRB 060927: optical afterglow confirmation
  52. GRB 060927A: ROTSE-III Detection of Optical Counterpart
  53. GRB060926: VLT redshift
  54. GRB 060926: Swift-UVOT Detections
  55. GRB 060923A: Schedule of Spitzer Space Telescope Observations
  56. GRB 060926: OPTIMA-Burst -- further observations
  57. GRB 060926: Swift XRT refined analysis
  58. GRB 060926, Swift-BAT refined analysis
  59. GRB 060923A: Radio Observations
  60. GRB 060926: MASTER OT alert observation
  61. GRB 060912A: Redshift of probable host galaxy
  62. GRB 060926: BOOTES-IR observations
  63. GRB060926 OPTIMA-Burst optical observation
  64. GRB 060926: MASTER optical observation
  65. GRB 060923C, Swift-BAT refined analysis
  66. GRB 060923C: VLA Observation
  67. GRB 060923C: NIR afterglow confirmed
  68. GRB060923C: AROMA optical obsevation
  69. GRB 060923C: Gemini Observations and Afterglow Candidate
  70. GRB 060923C, optical observation
  71. GRB 060923A: Gemini Second Epoch and Afterglow Confirmation
  72. GRB 060923C: VLT J-band observations
  73. GRB060923B: Swift/UVOT upper limits
  74. GRB 060923B: Swift XRT Refined Analysis
  75. GRB 060923C: Swift XRT refined analysis
  76. GRB 060923C, Swift-BAT partial refined analysis
  77. GRB 060923A: Swift XRT refined analysis
  78. GRB 060923C: Keck Observations
  79. GRB 060923A: Keck and Gemini Observations
  80. GRB 060923B, Swift-BAT refined analysis
  81. GRB060923C : Faulkes Telescope South optical limits
  82. GRB060923C: Faulkes Telescope North optical observations
  83. GRB 060923C: optical observation
  84. GRB 060923, Swift-BAT refined analysis
  85. GRB 060923: Early Super-LOTIS Observations
  86. GRB 060923: UKIRT nIR observations - candidate afterglow
  87. GRB060923: Faulkes Telescope North optical observations
  88. GRB060923 - SDSS Pre-Burst Observations
  89. GRB 060923: KAIT observations
  90. Swift detects a hard X-ray burst from AXP CXOU J164710.2-455216
  91. GRB060919: Swift/UVOT optical observations
  92. GRB 060919 : Faulkes South Telescope Observations
  93. GRB 060919, Swift-BAT refined analysis
  94. GRB060919: XRT refined analysis
  95. GRB 060912A: VLA Observation
  96. GRB 060912A: Probable Host Galaxy
  97. GRB060825: MAGIC telescope GeV observation
  98. Konus-Wind observation of GRB 060912
  99. GRB 060912: Redshift of nearby 2MASS galaxy
  100. GRB060912: optical observations

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