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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"

32692 results found.

  1. GRB050410: Radio Observations
  2. GRB 050410: Early observations with Swift-UVOT
  3. Swift-BAT detection of GRB 050410
  4. GRB 050408: Retraction of Proposed Host Galaxy
  5. GRB 050408: Inconsistency of host galaxy identification
  6. GRB 050408: Subaru Observations
  7. GRB 050408: WIDGET simultaneous optical observations
  8. GRB 050408: SOAR UBVRc Observations
  9. GRB 050408: Properties of the Host Galaxy
  10. GRB 050408: Mercator Optical Observations
  11. GRB050408: Radio Observations
  12. GRB 050408: Swift XRT analysis
  13. GRB 050408, SMARTS optical/IR afterglow observations
  14. GRB 050408: Optical limit at 20 min after the burst
  15. GRB 050408, optical observations
  16. GRB050408: REM NIR and Optical observation
  17. GRB 050408: Moderate-resolution Gemini Spectroscopy
  18. GRB 050408,optical observation
  19. GRB 050408 Optical Observations
  20. GRB 050408: Emission and absorption redshift
  21. GRB 050408: Mercator Optical Observations
  22. GRB 050408: Magellan astrometry and photometry
  23. GRB 050408: First Optical observations with TFOSC at the RTT150
  24. GRB 050408: steepening of the optical decay
  25. GRB 050408: Optical afterglow confirmed
  26. GRB 050408: opitcal observation
  27. GRB 050408, optical observations
  28. GRB 050408 optical candidate
  29. GRB 050408: Swift XRT Position
  30. GRB 050408: ROTSE-III Optical Limits
  31. GRB 050408 (=H3711): A Long X-Ray-Rich GRB Detected by HETE
  32. GRB050401: Radio Detection
  33. Swift-UVOT Optical Counterpart Candidate to XRF 050406
  34. GRB 050406: Magellan optical observations
  35. GRB 050406: early Swift XRT analysis results
  36. GRB 050406 BAT refined analysis
  37. GRB 050406: Early observations with Swift-UVOT
  38. GRB 050406: Swift XRT Position
  39. Konus-Wind observation of GRB 050401
  40. GRB050401: Radio observation at 610 MHz with GMRT
  41. GRB050401, radio observation at 4.8 GHz and 8.64 GHz
  42. GRB 050401: VLT spectroscopic redshift
  43. GRB 050401 Optical Observations
  44. GRB050401: Maidanak optical observation
  45. GRB 050401 BAT refined analysis
  46. GRB050401: TNG R-band observation
  47. GRB 050402A: IR Analysis
  48. GRB050402: XDSS counterpart
  49. GRB050401: ROTSE-III Detection of Prompt Optical Counterpart
  50. GRB 050401: Optical afterglow confirmed
  51. Swift-BAT detection of GRB 050401
  52. Retraction of three Swift GRB triggers
  53. GRB050331: No Afterglow Detected
  54. Swift-BAT detection of GRB 050331b
  55. GRB 050331: Swift UVOT Source
  56. Swift-BAT detection of GRB 050331
  57. Swift Data Publicly Available Starting April 5, 2005
  58. GRB050319: radio observation
  59. Konus-Wind observation of GRB 050326
  60. GRB050326: optical limit
  61. GRB 050326: Early observations with Swift-UVOT
  62. GRB 050326 XMM-Newton observation
  63. GRB 050326 : Planned XMM-Newton observation
  64. GRB 050326: Swift XRT Position
  65. GRB050326: optical limit 33min before GRB
  66. GRB 050326 BAT refined analysis
  67. GRB050326: delayed XRT observation
  68. Swift-BAT detection of a bright GRB 050326
  69. GRB050319, optical observations
  70. GRB050319, color indices
  71. GRB050319: optical observation, March 20-22
  72. GRB050319: RTT150 Optical Observations
  73. GRB 050319: Absorption redshift from the Nordic Optical Telescope
  74. GRB 050319: ROTSE-III Refined Analysis
  75. GRB 050318: Swift-BAT refined analysis
  76. GRB050319: VLA Observations
  77. GRB050319: radio observation
  78. GRB 050319 R band observations
  79. GRB 050319: Swift-UVOT detection of the afterglow
  80. GRB 050315: Variability Analysis of Swift BAT Time History
  81. GRB050319: Radio Observations
  82. GRB 050319: NIR afterglow candidate
  83. GRB 050319:Near IR afterglow
  84. GRB050319: BR optical photometry
  85. GRB 050318: SWIFT-UVOT refined analysis
  86. GRB 050318: Absorption redshift from Magellan
  87. GRB 050319: Optical observation
  88. GRB 050319: Swift-BAT refined analysis
  89. GRB050319,optical observation
  90. GRB 050318: Swift/UVOT detection of afterglow emission
  91. GRB 050318: Magellan optical afterglow identification
  92. GRB050318: Swift XRT position
  93. RXTE Observations of GRB050318
  94. GRB 050315, SMARTS optical afterglow decay
  95. GRB050223: analysis of the XMM-Newton observation
  96. GRB050316: MASTER before, simultanious and follow up optical
  97. GRB 050306: ROTSE-III early limits
  98. GRB 050315: Swift-BAT further refined analysis
  99. GRB 050315, SMARTS optical/IR afterglow observations
  100. GRB 050315 I-band observations

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