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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"

45676 results found.

  1. GRB 060604, optical observations
  2. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  3. GRB 060602A: Swift/XRT analysis
  4. BAT Trigger #214277 is SGR 1900+14
  5. GRB 060610: KAIT observations
  6. GRB 060607: RTT150 optical observations
  7. GRB 070706B: Watcher upper limit
  8. GRB 060607B: Swift-BAT Refined Analysis
  9. GRB060602A: Swift/UVOT upper limits
  10. GRB 060607B: Swift detection of a burst
  11. GCN 060607: Swift-UVOT obswervations.
  12. GRB 060607: Swift-BAT Refined Analysis
  13. GRB 060607: optical limit by "Pi of the Sky"
  14. GRB 060607: Swift-XRT Team refined analysis
  15. GRB 060607: IR observations
  16. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  17. VLT/UVES observations of GRB 060607
  18. GRB 060607: PROMPT Observations
  19. GRB 060605: RTT150 optical observations
  20. GRB 060607: REM NIR afterglow
  21. GRB 060607: Swift detection of a burst with bright optical counterpart
  22. GRB 060522: PROMPT Optical Limits
  23. GRB 060605 BAT refined analysis
  24. GRB 060605: Xinglong TNT optical observations
  25. GRB060602B : REM infrared observations
  26. GRB060605: Swift/UVOT detections
  27. GRB 060605: Swift-XRT Team refined analysis
  28. SALT spectroscopy of GRB 060605
  29. GRB 060605: TNG optical observations
  30. GRB 060605: RTT150 optical observations
  31. GRB060605: Spectral Observations and Redshift
  32. GRB 060605: ROTSE-III Optical Counterpart
  33. GRB 060605: Swift detection of a burst with optical counterpart
  34. GRB 060605: ROTSE-III Detection of Optical Counterpart
  35. GRB060604: Swift/UVOT detections
  36. GRB 060604: redshift
  37. GRB 060512: Keck Redshift
  38. GRB 060604 optical photometry
  39. GRB 060604: Swift-XRT Team refined analysis
  40. GRB 060604: BAT refined analysis
  41. GRB 060604A: ROTSE-III Optical Limits
  42. GRB 060604: Swift detection of a burst with possible optical counterpart
  43. GRB 060602A: Swift-BAT Refined Analysis: Correction
  44. GRB 060602B: XMM-Newton Survey Source
  45. GRB 060602B: Swift-XRT Refined Analysis
  46. GRB 060602B: Swift-BAT Refined Analysis
  47. GRB 060602B: Swift/UVOT observations
  48. GRB 060602A: Swift-BAT Refined Analysis
  49. GRB 060602B: RTT150 optical observations
  50. GRB 060211A : WIDGET simultaneous optical observations
  51. GRB060602A: optical observations(/transient?)
  52. GRB 060526: Tautenburg Second Epoch Observations
  53. GRB060602A: Bootes-IR observations
  54. GRB 060602B: Swift detection of a burst
  55. GRB060602B: Watcher observations - no OT candidate
  56. GRB060602B: BOOTES-IR candidate afterglow
  57. GRB060602 - SDSS Pre-Burst Observations
  58. GRB 060602: Swift detection of a burst
  59. GRB 060502A: Optical afterglow observations
  60. GRB 060526: Break in X-ray light curve
  61. GRB 060526: RTT150 optical observations
  62. GRB060526, optical observations
  63. GRB 051227 : WIDGET simultaneous optical observations
  64. GRB 051028 : WIDGET pre-trigger limit
  65. GRB 060526: RTT150 optical observations
  66. GRB 060526: Multiple Optical Flares
  67. GRB060526: afterglow fitting and probable jet break
  68. GRB 060526: RTT150 optical observations
  69. GRB060526: Optical counterpart from MIRO
  70. GRB060502b: optical observations
  71. GRB 060526: RTT150 optical observations
  72. GRB 060526: Tautenburg OT observation and light curve fitting
  73. GRB060526: optical observations
  74. GRB 060526: SMARTS optical/IR afterglow observations
  75. GRB060526: possible break in the optical light curve
  76. GRB 060526: REM observations
  77. GRB 060526: RTT150 optical observations, afterglow flattening
  78. GRB 060526: Optical Flare
  79. GRB 060526: Refined analysis of the Swift-BAT burst
  80. GRB 060526: RTT150 optical observations
  81. GRB060526: Further Swift-UVOT Observations
  82. GRB060526, optical observations
  83. GRB 060526: Magellan Redshift
  84. GRB 060526 Lulin optical observation
  85. GRB 060526: Swift/XRT Team refined analysis
  86. GRB 060526: TNG optical observations
  87. GRB 060526: ROTSE-III Observations of Optical Counterpart
  88. GRB 060526: Watcher Observations
  89. GRB060526 - SDSS Pre-burst Observations
  90. GRB 060526: Continued emission for the Swift burst
  91. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  92. GRB060505: VLT observations of the optical afterglow
  93. GRB 060413 : WIDGET simultaneous optical observations
  94. GRB 060522: Swift/UVOT Observations: Correction
  95. GRB 060522: Swift/UVOT Observations of the Optical Afterglow
  96. XMM-Newton observation of GRB060510b
  97. GRB060512: Late-Time P200 Observations
  98. GRB060522: z = 5.11 Keck-LRIS Redshift
  99. GRB 060522: Swift/XRT Team refined analysis
  100. GRB 060522: Swift-BAT Refined Analysis

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