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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"

32693 results found.

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

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