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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"

28233 results found.

  1. GRB050326: analysis of the XMM-Newton observation
  2. GRB050418: Null Optical Observations
  3. GRB050416A, optical observations
  4. GRB 050418: Swift-BAT refined analysis
  5. GRB 050416: Mitsume optical observation
  6. GRB050416B: IR observations
  7. GRB050412: Radio Observations
  8. GRB 050416: Swift/UVOT detection of afterglow emission
  9. GRB050416: Refined Swift-XRT analysis
  10. GRB 050416,optical observation
  11. GRB050416: P200 NIR Observations
  12. GRB 050416: Radio observations
  13. Swift BAT/XRT Detection of GRB 050416
  14. GRB 050412: PROMPT VRcIc Observations
  15. GRB 050408: Kuiper 1.5m observations
  16. GRB 050412: early Swift XRT analysis results
  17. GRB 050412: Early Optical/Ultraviolet Observations with
  18. GRB 050408: SDSS Field Calibration
  19. GRB050412: P60 Observations
  20. GRB 050412: Swift XRT Position
  21. Swift-BAT Detection of GRB 050412: A Bright, Long Burst
  22. GRB 050412: IR and Optical observations
  23. GRB 050412: IR Observations
  24. GRB050408: Radio Observations
  25. GRB 050401: Optical limit
  26. GRB050410: P60 Observations
  27. GRB 050410: Early Optical/Ultraviolet Observations with Swift/UVOT
  28. GRB 050408: Early Optical/Ultraviolet Observations with Swift/UVOT
  29. GRB050410: Radio Observations
  30. GRB050410: MASTER optical observations
  31. GRB 050410: Early observations with Swift-UVOT
  32. Swift-BAT detection of GRB 050410
  33. GRB 050408: Inconsistency of host galaxy identification
  34. GRB 050408: Subaru Observations
  35. GRB 050408: WIDGET simultaneous optical observations
  36. GRB 050408: Properties of the Host Galaxy
  37. GRB050408: Radio Observations
  38. GRB 050408: Swift XRT analysis
  39. GRB 050408: Optical limit at 20 min after the burst
  40. GRB050408: REM NIR and Optical observation
  41. GRB 050408,optical observation
  42. GRB 050408: Mercator Optical Observations
  43. GRB 050408: Optical afterglow confirmed
  44. GRB 050408: opitcal observation
  45. GRB 050408, optical observations
  46. GRB 050408 optical candidate
  47. GRB 050408: Swift XRT Position
  48. GRB050408: MASTER optical observations
  49. GRB050401: Radio Detection
  50. GRB 050406: early Swift XRT analysis results
  51. GRB 050406 BAT refined analysis
  52. GRB 050406: Early observations with Swift-UVOT
  53. Swift-BAT detection of GRB 050406
  54. GRB050401, radio observation at 4.8 GHz and 8.64 GHz
  55. GRB 050401: VLT spectroscopic redshift
  56. GRB 050401 BAT refined analysis
  57. GRB050401: TNG R-band observation
  58. GRB 050402: Early observations with Swift-UVOT
  59. Swift Trigger 113225: P60 Observations
  60. GRB 050401: Optical afterglow confirmed
  61. GRB 050401: Prompt XRT position
  62. Retraction of three Swift GRB triggers
  63. GRB050331: No Afterglow Detected
  64. Swift-BAT detection of GRB 050331b
  65. GRB 050331: Swift UVOT Source
  66. Swift-BAT detection of GRB 050331
  67. GRB 050326: Early observations with Swift-UVOT
  68. GRB 050326 XMM-Newton observation
  69. GRB 050326: Swift XRT Position
  70. GRB 050326 BAT refined analysis
  71. GRB050326: delayed XRT observation
  72. GRB050319, color indices
  73. GRB050319: optical observation, March 20-22
  74. GRB050319: RTT150 Optical Observations
  75. Swift-BAT trigger 112060 is not a real GRB
  76. GRB 050318: Swift-BAT refined analysis
  77. GRB050319: VLA Observations
  78. GRB050319: radio observation
  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. GRB 050318: SWIFT-UVOT refined analysis
  85. GRB 050319 : Confirmation of optical afterglow decay
  86. GRB 050319: Swift-BAT refined analysis
  87. GRB050319,optical observation
  88. GRB 050318: Swift/UVOT detection of afterglow emission
  89. RXTE Observations of GRB050318
  90. GRB050223: analysis of the XMM-Newton observation
  91. GRB050316: MASTER before, simultanious and follow up optical
  92. GRB 050306: ROTSE-III early limits
  93. GRB050316: MASTER optical observations
  94. GRB 050315: Swift-BAT further refined analysis
  95. GRB 050315 I-band observations
  96. GRB050315: Radio afterglow
  97. GRB050315: Swift-BAT Refined analysis
  98. Non-detection of GRB050315 in ATCA Radio Observations
  99. GRB 050219b: Gemini/GNIRS near-infrared spectroscopy
  100. GRB 050315: Early Observations with Swift/UVOT

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