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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"

32690 results found.

  1. Swift-BAT detection of GRB 050410
  2. GRB 050408: Retraction of Proposed Host Galaxy
  3. GRB 050408: Inconsistency of host galaxy identification
  4. GRB 050408: Subaru Observations
  5. GRB 050408: WIDGET simultaneous optical observations
  6. GRB 050408: SOAR UBVRc Observations
  7. GRB 050408: Properties of the Host Galaxy
  8. GRB 050408: Mercator Optical Observations
  9. GRB050408: Radio Observations
  10. GRB 050408: Swift XRT analysis
  11. GRB 050408, SMARTS optical/IR afterglow observations
  12. GRB 050408: Optical limit at 20 min after the burst
  13. GRB 050408, optical observations
  14. GRB050408: REM NIR and Optical observation
  15. GRB 050408: Moderate-resolution Gemini Spectroscopy
  16. GRB 050408,optical observation
  17. GRB 050408 Optical Observations
  18. GRB 050408: Emission and absorption redshift
  19. GRB 050408: Mercator Optical Observations
  20. GRB 050408: Magellan astrometry and photometry
  21. GRB 050408: First Optical observations with TFOSC at the RTT150
  22. GRB 050408: steepening of the optical decay
  23. GRB 050408: Optical afterglow confirmed
  24. GRB 050408: opitcal observation
  25. GRB 050408, optical observations
  26. GRB 050408 optical candidate
  27. GRB 050408: Swift XRT Position
  28. GRB 050408: ROTSE-III Optical Limits
  29. GRB 050408 (=H3711): A Long X-Ray-Rich GRB Detected by HETE
  30. GRB050401: Radio Detection
  31. Swift-UVOT Optical Counterpart Candidate to XRF 050406
  32. GRB 050406: Magellan optical observations
  33. GRB 050406: early Swift XRT analysis results
  34. GRB 050406 BAT refined analysis
  35. GRB 050406: Early observations with Swift-UVOT
  36. GRB 050406: Swift XRT Position
  37. Konus-Wind observation of GRB 050401
  38. GRB050401: Radio observation at 610 MHz with GMRT
  39. GRB050401, radio observation at 4.8 GHz and 8.64 GHz
  40. GRB 050401: VLT spectroscopic redshift
  41. GRB 050401 Optical Observations
  42. GRB050401: Maidanak optical observation
  43. GRB 050401 BAT refined analysis
  44. GRB050401: TNG R-band observation
  45. GRB 050402A: IR Analysis
  46. GRB050402: XDSS counterpart
  47. GRB050401: ROTSE-III Detection of Prompt Optical Counterpart
  48. GRB 050401: Optical afterglow confirmed
  49. Swift-BAT detection of GRB 050401
  50. Retraction of three Swift GRB triggers
  51. GRB050331: No Afterglow Detected
  52. Swift-BAT detection of GRB 050331b
  53. GRB 050331: Swift UVOT Source
  54. Swift-BAT detection of GRB 050331
  55. Swift Data Publicly Available Starting April 5, 2005
  56. GRB050319: radio observation
  57. Konus-Wind observation of GRB 050326
  58. GRB050326: optical limit
  59. GRB 050326: Early observations with Swift-UVOT
  60. GRB 050326 XMM-Newton observation
  61. GRB 050326 : Planned XMM-Newton observation
  62. GRB 050326: Swift XRT Position
  63. GRB050326: optical limit 33min before GRB
  64. GRB 050326 BAT refined analysis
  65. GRB050326: delayed XRT observation
  66. Swift-BAT detection of a bright GRB 050326
  67. GRB050319, optical observations
  68. GRB050319, color indices
  69. GRB050319: optical observation, March 20-22
  70. GRB050319: RTT150 Optical Observations
  71. GRB 050319: Absorption redshift from the Nordic Optical Telescope
  72. GRB 050319: ROTSE-III Refined Analysis
  73. GRB 050318: Swift-BAT refined analysis
  74. GRB050319: VLA Observations
  75. GRB050319: radio observation
  76. GRB 050319 R band observations
  77. GRB 050319: Swift-UVOT detection of the afterglow
  78. GRB 050315: Variability Analysis of Swift BAT Time History
  79. GRB050319: Radio Observations
  80. GRB 050319: NIR afterglow candidate
  81. GRB 050319:Near IR afterglow
  82. GRB050319: BR optical photometry
  83. GRB 050318: SWIFT-UVOT refined analysis
  84. GRB 050318: Absorption redshift from Magellan
  85. GRB 050319: Optical observation
  86. GRB 050319: Swift-BAT refined analysis
  87. GRB050319,optical observation
  88. GRB 050318: Swift/UVOT detection of afterglow emission
  89. GRB 050318: Magellan optical afterglow identification
  90. GRB050318: Swift XRT position
  91. RXTE Observations of GRB050318
  92. GRB 050315, SMARTS optical afterglow decay
  93. GRB050223: analysis of the XMM-Newton observation
  94. GRB050316: MASTER before, simultanious and follow up optical
  95. GRB 050306: ROTSE-III early limits
  96. GRB 050315: Swift-BAT further refined analysis
  97. GRB 050315, SMARTS optical/IR afterglow observations
  98. GRB 050315 I-band observations
  99. GRB050315: Radio afterglow
  100. GRB 050315: Absorption redshift

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