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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"

32764 results found.

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

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