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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"

24441 results found.

  1. GRB060502A, optical observation
  2. GRB 060502B: Swift/UVOT upper limits
  3. GRB 060502A: Swift/UVOT source detection
  4. GRB 060429: Refined IPN error box and Konus-Wind spectrum
  5. GRB 060502B: AROMA optical observations
  6. GRB 060502B: Refined analysis of the Swift-BAT short burst
  7. Short GRB 060502B: Tautenburg Observation
  8. GRB 060502A: TTT Observations
  9. GRB 060501: P60 Observations and Candidate Retraction
  10. GRB 060502B: MASTER optical observations
  11. GRB 060502B: Swift detection of a short burst
  12. GRB 060502: Swift-BAT refined analysis
  13. GRB060501: P60 imaging and afterglow candidate
  14. GRB 060501: Refined analysis of the Swift-BAT burst
  15. GRB060501: Swift XRT position
  16. GRB 060501: ROTSE-III Optical Limits
  17. GRB 060428A: PROMPT Observations
  18. GRB 060427B: MASTER optical observations
  19. GRB060428B: Swift XRT Team refined analysis
  20. GRB 060427B: IPN localization of a short hard burst
  21. GRB 060428B: Refined analysis of the Swift-BAT burst
  22. GRB 060428B: KAIT observations
  23. GRB060425:MASTER optical limit
  24. GRB 051117A: Bright host galaxy not confirmed
  25. GRB060428B, optical observation
  26. GRB 060428A: Refined analysis of the Swift-BAT burst
  27. GRB060427:MASTER optical limit
  28. GRB 060428b: Optical afterglow candidate
  29. GRB060428A: Swift XRT Team refined analysis
  30. GRB 060427: Refined analysis of the Swift-BAT burst
  31. GRB060427: Swift XRT Team refined analysis
  32. GRB060418: Swift XRT Team Further Refined Analysis
  33. GRB060425:MASTER survey observations
  34. GRB 060425: IPN localization and KW spectrum of a short, hard burst
  35. GRB060424: optical afterglow detection
  36. GRB 060424: Refined analysis of the Swift-BAT burst
  37. GRB 060421: TTT Observations
  38. OT 060420: Likely Not a New Cosmic Transient
  39. Swift-BAT detection of Mrk 421
  40. OT 060420: CONCAM detection of a candidate new magnitude 5 optical
  41. GRB 060421: Swift-BAT Refined Analysis
  42. GRB 060421: Swift-XRT refined analysis
  43. Konus-Wind observation of GRB 060418
  44. GRB(?)060421:MASTER optical limit
  45. Possible GRB060421: BART limits
  46. GRB 060418: FRAM early afterglow observation
  47. GRB 060418: Refined Analysis of the Swift-BAT burst
  48. GRB060418: Swift XRT Team Refined Analysis
  49. GRB 060418, SMARTS continuing afterglow observations
  50. GRB 060418: PROMPT Detections
  51. GRB 060418, SMARTS optical/IR afterglow observations
  52. GRB 060413: Refined analysis of the Swift-BAT burst
  53. GRB 060413: XRT refined analysis
  54. GRB 060413: Swift detection of a burst
  55. GRB060403: optical observations
  56. GRB 060403: Swift/UVOT upper limits
  57. SGR 1900+14: BAT observations
  58. GRB 060403: Refined analysis of the Swift-BAT burst
  59. Konus-Wind observation of the recent SGR 1900+14 activity. Will
  60. GRB060331: Swift/UVOT upper limits
  61. HETE Trigger 4043: ROTSE-III Optical Limits
  62. H4043, an unusual high-energy transient observed by HETE
  63. SGR 1900+14: bright burst detected by Konus-Wind on March 28
  64. GRB 060322: Confirmation of Swift XRT afterglow
  65. GRB 060211A: optical observation
  66. GRB060323: optical limit
  67. GRB060211B: optical observation
  68. SGR 1900+14: Refined Swift-BAT analysis of the renewed activity
  69. GRB 060322: Swift XRT afterglow candidate
  70. GRB 060323: optical afterglow confirmed
  71. GRB 060323: Refined analysis of the Swift-BAT burst
  72. GRB 060323: optical observations at TNG
  73. GRB 060323: Swift XRT refined analysis
  74. GRB 060322: Refined analysis of the Swift-BAT burst
  75. GRB060219: optical observation
  76. GRB060206: optical observation
  77. GRB060218/SN2006aj: optical observations
  78. GRB 060319: IAC-80 optical observations
  79. GRB060319: Swift XRT refined analysis
  80. GRB060319: MASTER limit
  81. GRB 060319: Swift-BAT refined analysis
  82. GRB060319: MASTER optical observation
  83. GRB 060313: early afterglow NIR upper limits with REM
  84. IBAS Alert n. 3221: not a GRB
  85. Konus-Wind observation of GRB 060313
  86. GRB 060313: PROMPT Observations
  87. GRB060313: optical observations of the afterglow candidate
  88. GRB 060313: Refined analysis of the Swift-BAT bright short hard burst
  89. GRB060218: SARA Observations of SN2006aj
  90. GRB 060312: Refined analysis of the Swift-BAT burst
  91. GRB 060218/SN 2006aj, high resolution spectra
  92. GRB 060312: ROTSE-III Optical Limits
  93. IBAS Alert n. 3218 : not a real GRB
  94. GRB 060306: SOAR Ks Observations
  95. Bright short hard GRB 060303: IPN localization and Konus spectrum
  96. GRB060219: Liverpool Telescope observations
  97. GRB 060306: MAGNUM observations
  98. GRB060218: analysis of the XMM-Newton observation
  99. GRB 060306: Swift-BAT refined analysis
  100. GRB 060306: Swift-XRT team refined analysis

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