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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"

38586 results found.

  1. GRB 050416b: Tentative Swift XRT Position
  2. GRB 050315: potential host galaxy
  3. GRB050326: analysis of the XMM-Newton observation
  4. GRB050418: Null Optical Observations
  5. GRB 050412: Chandra observations
  6. GRB050416A, optical observations
  7. GRB 050418: Swift-BAT refined analysis
  8. Swift-BAT detection of the bright and long GRB 050418
  9. GRB 050416: Mitsume optical observation
  10. GRB 050416 : optical observation at Xinglong observatory
  11. GRB 050416B: optical observations
  12. GRB 050416b: Swift-BAT refined analysis
  13. GRB 050416b: LCO observations
  14. GRB 050416b: LCO observations
  15. GRB050416B: IR observations
  16. GRB 050416: Swift/UVOT refined analysis
  17. Swift-BAT detection of GRB 050416b
  18. IBAS GRB Alert # 2463: not a GRB
  19. GRB050412: Radio Observations
  20. GRB 050416: Swift/UVOT detection of afterglow emission
  21. GRB050416: Maidanak optical observations
  22. GRB 050416: Swift-BAT refined analysis
  23. GRB 050416,optical observation
  24. GRB050416: P200 NIR Observations
  25. GRB 050416: Swift XRT Position
  26. GRB 050416: Radio observations
  27. Confirmation of OT for GRB050416
  28. GRB050416: P60 Afterglow Candidate
  29. Swift BAT/XRT Detection of GRB 050416
  30. GRB 050412: Subaru observations
  31. GRB 050408: RTT150 optical observations
  32. GRB050408: optical observation
  33. GRB 050412: PROMPT VRcIc Observations
  34. GRB 050408: Kuiper 1.5m observations
  35. GRB 050412: optical observations
  36. GRB 050408: refined XRT analysis, no jet break seen yet
  37. GRB 050412: early Swift XRT analysis results
  38. GRB 050412 : XingLong optical observation
  39. GRB 050412: Swift-BAT refined analysis
  40. GRB 050412: ANU 2.3m observations
  41. GRB 050412: Early Optical/Ultraviolet Observations with
  42. GRB 050408: SDSS Field Calibration
  43. GRB 050412: LCO Optical Observations
  44. GRB 050412: Optical observations
  45. GRB050412: P60 Observations
  46. GRB 050412: Swift XRT Position
  47. GRB050412: optical limit before and during GRB
  48. GRB 050412: LCO optical observations
  49. GRB050412: ROTSE-III Optical Limits
  50. Swift-BAT Detection of GRB 050412: A Bright, Long Burst
  51. GRB 050412: IR and Optical observations
  52. GRB 050412: IR Observations
  53. GRB050408: Radio Observations
  54. GRB050410: P60 Observations
  55. GRB 050410: Early Optical/Ultraviolet Observations with Swift/UVOT
  56. GRB 050410, optical observations
  57. GRB 050408: PROMPT VRcIc Observations
  58. GRB 050408: Early Optical/Ultraviolet Observations with Swift/UVOT
  59. GRB 050410 R band Optical Observations
  60. GRB 050410, optical observations
  61. GRB050410: Radio Observations
  62. GRB 050408: Swift XRT measurement of possible jet break
  63. GRB050410: MASTER optical observations
  64. GRB 050410: Early observations with Swift-UVOT
  65. Swift-BAT detection of GRB 050410
  66. GRB 050410: Swift XRT Position
  67. GRB 050408: Subaru Observations
  68. GRB 050408: WIDGET simultaneous optical observations
  69. GRB 050408: SOAR UBVRc Observations
  70. GRB 050408: Mercator Optical Observations
  71. GRB050408: Radio Observations
  72. GRB 050408: Swift XRT analysis
  73. GRB 050408, SMARTS optical/IR afterglow observations
  74. GRB 050408: Optical limit at 20 min after the burst
  75. GRB 050408, optical observations
  76. GRB050408: REM NIR and Optical observation
  77. GRB 050408: Moderate-resolution Gemini Spectroscopy
  78. GRB 050408,optical observation
  79. GRB 050408 Optical Observations
  80. GRB 050408: Emission and absorption redshift
  81. GRB 050408: Magellan astrometry and photometry
  82. GRB 050408: steepening of the optical decay
  83. GRB 050408: Optical afterglow confirmed
  84. GRB 050408: opitcal observation
  85. GRB 050408, optical observations
  86. GRB 050408: Swift XRT Position
  87. GRB 050408: ROTSE-III Optical Limits
  88. GRB 050408 (=H3711): A Long X-Ray-Rich GRB Detected by HETE
  89. GRB050408: MASTER optical observations
  90. GRB050401: Radio Detection
  91. Swift-UVOT Optical Counterpart Candidate to XRF 050406
  92. GRB 050406: Magellan optical observations
  93. GRB 050406: early Swift XRT analysis results
  94. GRB 050406 BAT refined analysis
  95. GRB 050406: Early observations with Swift-UVOT
  96. GRB 050406: Swift XRT Position
  97. Swift-BAT detection of GRB 050406
  98. Konus-Wind observation of GRB 050401
  99. GRB050401: Radio observation at 610 MHz with GMRT
  100. GRB050401, radio observation at 4.8 GHz and 8.64 GHz

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