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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"

23685 results found.

  1. GRB060714: optical observations
  2. GRB060707 possible optical confirmation
  3. Swift trigger 219136 is probably not a GRB
  4. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  5. GRB 060605: SkyNet Optical Limits
  6. GRB060526: optical observations
  7. GRB 060712: Refined analysis of the Swift-BAT burst
  8. GRB 060712: Swift detection of a burst
  9. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  10. GRB 060708: PROMPT Optical Limits
  11. GRB 060708: Refined analysis of the Swift-BAT burst
  12. GRB 060708: Swift detection of a burst with an UVOT countpart
  13. GRB060707 possible optical confirmation
  14. GRB 060707: BOOTES-IR optical afterglow candidate
  15. GRB 060707: Refined analysis of the Swift-BAT burst
  16. GRB 060707: Swift detection of a burst
  17. GRB 060105: Upper limit on Host Galaxy
  18. GRB 060614: redshift confirmation
  19. Swift-BAT trigger 215279 is not a GRB
  20. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  21. GRB 060614: spectroscopy
  22. Konus-Wind observation of GRB 060614
  23. The Unusually Long-Lived Afterglow of GRB 060614
  24. GRB 060605, optical observations
  25. GRB 060614: Swift-BAT refined analysis
  26. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  27. BAT Trigger #214277 is SGR 1900+14
  28. GRB 060610: KAIT observations
  29. GRB 060607: RTT150 optical observations
  30. GRB 060607B: Swift-BAT Refined Analysis
  31. GRB 060607B: Swift detection of a burst
  32. GRB 060607: Swift-BAT Refined Analysis
  33. GRB 060607: PROMPT Observations
  34. GRB 060605: RTT150 optical observations
  35. GRB 060607: Swift detection of a burst with bright optical counterpart
  36. GRB 060522: PROMPT Optical Limits
  37. GRB 060605 BAT refined analysis
  38. GRB060605: Swift/UVOT detections
  39. SALT spectroscopy of GRB 060605
  40. GRB 060605: TNG optical observations
  41. GRB 060605: RTT150 optical observations
  42. GRB 060605: ROTSE-III Optical Counterpart
  43. GRB 060605: Swift detection of a burst with optical counterpart
  44. GRB060604: Swift/UVOT detections
  45. GRB 060604: redshift
  46. GRB 060604: BAT refined analysis
  47. GRB 060604A: ROTSE-III Optical Limits
  48. GRB 060604: Swift detection of a burst with possible optical counterpart
  49. GRB 060602B: Swift-BAT Refined Analysis
  50. GRB 060602A: Swift-BAT Refined Analysis
  51. GRB 060602B: RTT150 optical observations
  52. GRB 060211A : WIDGET simultaneous optical observations
  53. GRB 060602B: Swift detection of a burst
  54. GRB060602 - SDSS Pre-Burst Observations
  55. GRB 060602: Swift detection of a burst
  56. GRB 060526: RTT150 optical observations
  57. GRB 051227 : WIDGET simultaneous optical observations
  58. GRB 051028 : WIDGET pre-trigger limit
  59. GRB 060526: RTT150 optical observations
  60. GRB 060526: RTT150 optical observations
  61. GRB060526: Optical counterpart from MIRO
  62. GRB060502b: optical observations
  63. GRB 060526: RTT150 optical observations
  64. GRB 060526: RTT150 optical observations, afterglow flattening
  65. GRB 060526: Refined analysis of the Swift-BAT burst
  66. GRB 060526: RTT150 optical observations
  67. GRB060526, optical observations
  68. GRB 060526: Magellan Redshift
  69. GRB 060526: TNG optical observations
  70. GRB060526 - SDSS Pre-burst Observations
  71. GRB 060526: Continued emission for the Swift burst
  72. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  73. GRB 060413 : WIDGET simultaneous optical observations
  74. GRB060512: Late-Time P200 Observations
  75. GRB060522: z = 5.11 Keck-LRIS Redshift
  76. GRB 060522: Swift/XRT Team refined analysis
  77. GRB 060522: Swift-BAT Refined Analysis
  78. GRB 060522: TNG optical observations
  79. GRB 060522: Swift detection of a burst with possible optical afterglow
  80. GRB 060512: reanalysis of optical spectra
  81. GRB 060516: Refined analysis of the Swift-BAT burst
  82. GRB 060512: TNG optical spectroscopy
  83. GRB 060516: Swift detection of a burst
  84. GRB 060505 BAT refined analysis
  85. GRB 060515 BAT refined analysis
  86. GRB 060512: TAROT optical observation
  87. GRB060515: Swift/UVOT initial observation
  88. GRB 060515: TAROT optical observation
  89. GRB 060515: Swift detection of a burst
  90. Swift/UVOT observations of GRB060512.
  91. GRB 060512: Subaru NIR observation
  92. GRB060512: Swift XRT Team refined analysis
  93. GRB 060512: Detection of NIR afterglow
  94. GRB 060512: Swift-BAT Refined Analysis
  95. GRB 060505 - OT candidate + galaxy spectrum
  96. GRB 060512: optical decay
  97. GRB060512 - SDSS Pre-Burst Observations
  98. GRB060512 Name Correction: LT Afterglow detection
  99. GRB060512: Liverpool Telescope Afterglow detection
  100. GRB 060512: Swift detection of a burst with an optical afterglow

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