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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"

23686 results found.

  1. GRB 060512: Swift detection of a burst with an optical afterglow
  2. GRB 060505: X-ray afterglow - Correction -
  3. GRB 060505: X-ray afterglow
  4. Konus-Wind observation of GRB 060510A
  5. GRB060418: optical observations
  6. GRB060510B: Swift XRT refined analysis
  7. GRB 060510A: Refined analysis of the Swift-BAT burst
  8. GRB 060510B: Swift-BAT Refined Analysis
  9. GRB060510A: XRT refined analysis
  10. GRB060510 - SDSS Pre-Burst Observations
  11. GRB060510B : Faulkes North Telescope detection
  12. GRB 060510B: Super-LOTIS Observations
  13. GRB 060510B: Swift detection of a burst
  14. GRB 060510: Swift detection of a burst with optical transient
  15. GRB 060507: Final Refined analysis of the Swift-BAT burst
  16. GRB 060507: Swift-BAT Refined Analysis
  17. GRB 060505: PROMPT Observations
  18. GRB 060507: Swift/UVOT Upper Limits
  19. GRB 060507: Swift XRT Team Refined Analysis
  20. GRB060507: Swift XRT position
  21. GRB 060507: Swift detection of a burst
  22. GRB 060429: Suzaku WAM observation
  23. GRB060505: Swift/UVOT Observations
  24. GRB 060505: Swift XRT Team Refined Analysis
  25. GRB060425: new MASTER survey method
  26. GRB 060306: Further Analysis of SOAR and APO NIR Observations
  27. GRB 060505: Swift XRT afterglow canditate position
  28. GRB 060505: Swift-BAT detection of a weak burst
  29. GRB 060428B: spectroscopy
  30. GRB060502A, optical observation
  31. GRB 060502B: Swift/UVOT upper limits
  32. GRB 060502A: Swift/UVOT source detection
  33. GRB 060429: Refined IPN error box and Konus-Wind spectrum
  34. GRB 060502B: Refined analysis of the Swift-BAT short burst
  35. GRB 060427B Milagro GeV/TeV Observations
  36. GRB 060502A: TTT Observations
  37. GRB 060502B: Swift detection of a short burst
  38. GRB 060502: Swift-BAT refined analysis
  39. GRB 060502: APO Spectroscopic Observations
  40. GRB060502: Super-LOTIS Observations
  41. GRB 060502: Swift detection of a burst with an optical counterpart
  42. GRB 060501: Refined analysis of the Swift-BAT burst
  43. GRB 060501: Swift detection of a burst
  44. IPN triangulation of GRB060429 (short/hard)
  45. Konus-Wind observation of GRB 060427B
  46. GRB060428B - SDSS Pre-Burst Observations
  47. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  48. GRB 060428A: PROMPT Observations
  49. GRB 060427B: MASTER optical observations
  50. GRB 060427B: IPN localization of a short hard burst
  51. GRB 060428B: Refined analysis of the Swift-BAT burst
  52. GRB 060428B: KAIT observations
  53. GRB060428A: Swift/UVOT observations.
  54. GRB 060428A: Refined analysis of the Swift-BAT burst
  55. GRB060428A: Swift XRT Team refined analysis
  56. GRB 060428B: Swift detection of a burst
  57. GRB 060428: Swift detection of a burst
  58. GRB 060427: NOT observations
  59. GRB 060427: Swift/UVOT upper limits.
  60. GRB 060427: Swift detection of a burst
  61. GRB 060425: IPN localization and KW spectrum of a short, hard burst
  62. GRB 060424: Swift detection of a burst
  63. GRB 060421: TTT Observations
  64. Swift-BAT detection of Mrk 421
  65. GRB060421: Swift/UVOT observations
  66. GRB 060421: Swift-BAT Refined Analysis
  67. GRB060418: optical observations
  68. Konus-Wind observation of GRB 060418
  69. GRB(?)060421:MASTER optical limit
  70. GRB(?) 060421: Swift detection of a burst
  71. GRB 060418: JHKs PAIRITEL Observations of Afterglow
  72. GRB 060418: Radio Observations
  73. GRB060418: Optical Observations
  74. GRB 060418: Refined Analysis of the Swift-BAT burst
  75. GRB 060418: PROMPT Detections
  76. GRB060418 : LT optical afterglow observation
  77. GRB 060418: Swift detection of a burst with bright x-ray and optical afterglow
  78. SGR 1900+14: Swift detection of an outburst
  79. GRB 060413: Refined analysis of the Swift-BAT burst
  80. GRB 060413: Watcher UBVR observations
  81. GRB 060413: XRT refined analysis
  82. GRB 060413: Swift detection of a burst
  83. GRB060403: optical observations
  84. GRB 060403: Swift/UVOT upper limits
  85. HETE Triggers H4043 and H4044 Not Due to New Cosmic Source
  86. Konus-Wind observation of the recent SGR 1900+14 activity. Will
  87. GRB 060403: Swift detection of a burst
  88. HETE trigger H4044: RTT150 optical observations
  89. H4044, a Repeat Outburst From The Source of H4043 (="GRB060331")
  90. H4043, an unusual high-energy transient observed by HETE
  91. GRB 060322: LNA optical limit
  92. SGR 1900+14: bright burst detected by Konus-Wind on March 28
  93. SGR 1900+14: Swift-BAT detection of a cluster of outbursts
  94. SGR 1900+14: Swift-BAT detection of a bright outburst
  95. GRB 060323 : WIDGET simultaneous optical observations
  96. GRB 060322: Confirmation of Swift XRT afterglow
  97. GRB 060211A: optical observation
  98. GRB060211B: optical observation
  99. SGR 1900+14: Swift detection of renewed activity
  100. GRB060323: NOT optical observations

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