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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"

37171 results found.

  1. GRB 060605: Swift-XRT Team refined analysis
  2. SALT spectroscopy of GRB 060605
  3. GRB 060605: TNG optical observations
  4. GRB 060605: RTT150 optical observations
  5. GRB 060605: ROTSE-III Optical Counterpart
  6. GRB 060605: Swift detection of a burst with optical counterpart
  7. GRB 060605: ROTSE-III Detection of Optical Counterpart
  8. GRB 060604: redshift
  9. GRB 060512: Keck Redshift
  10. GRB 060604 optical photometry
  11. GRB 060604: Swift-XRT Team refined analysis
  12. GRB 060604: BAT refined analysis
  13. GRB 060604A: ROTSE-III Optical Limits
  14. GRB 060604: Swift detection of a burst with possible optical counterpart
  15. GRB 060602A: Swift-BAT Refined Analysis: Correction
  16. GRB 060602B: XMM-Newton Survey Source
  17. GRB 060602B: Swift-XRT Refined Analysis
  18. GRB 060602B: Swift-BAT Refined Analysis
  19. GRB 060602B: Swift/UVOT observations
  20. GRB 060602A: Swift-BAT Refined Analysis
  21. GRB 060602B: RTT150 optical observations
  22. GRB 060211A : WIDGET simultaneous optical observations
  23. GRB060602A: optical observations(/transient?)
  24. GRB 060526: Tautenburg Second Epoch Observations
  25. GRB060602A: Bootes-IR observations
  26. GRB 060602B: Swift detection of a burst
  27. GRB060602B: Watcher observations - no OT candidate
  28. GRB060602B: BOOTES-IR candidate afterglow
  29. GRB060602 - SDSS Pre-Burst Observations
  30. GRB 060602: Swift detection of a burst
  31. GRB 060502A: Optical afterglow observations
  32. GRB 060526: Break in X-ray light curve
  33. GRB 060526: RTT150 optical observations
  34. GRB060526, optical observations
  35. GRB 051227 : WIDGET simultaneous optical observations
  36. GRB 051028 : WIDGET pre-trigger limit
  37. GRB 060526: RTT150 optical observations
  38. GRB 060526: Multiple Optical Flares
  39. GRB060526: afterglow fitting and probable jet break
  40. GRB 060526: RTT150 optical observations
  41. GRB060502b: optical observations
  42. GRB 060526: RTT150 optical observations
  43. GRB 060526: Tautenburg OT observation and light curve fitting
  44. GRB060526: optical observations
  45. GRB 060526: SMARTS optical/IR afterglow observations
  46. GRB060526: possible break in the optical light curve
  47. GRB 060526: REM observations
  48. GRB 060526: RTT150 optical observations, afterglow flattening
  49. GRB 060526: Optical Flare
  50. GRB 060526: MDM-2.4m Observations
  51. GRB 060526: Refined analysis of the Swift-BAT burst
  52. GRB 060526: RTT150 optical observations
  53. GRB060526: Further Swift-UVOT Observations
  54. GRB060526, optical observations
  55. GRB 060526: Magellan Redshift
  56. GRB 060526 Lulin optical observation
  57. GRB 060526: Swift/XRT Team refined analysis
  58. GRB 060526: TNG optical observations
  59. GRB 060526: ROTSE-III Observations of Optical Counterpart
  60. GRB 060526: Watcher Observations
  61. GRB060526 - SDSS Pre-burst Observations
  62. GRB 060526: Continued emission for the Swift burst
  63. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  64. GRB 060413 : WIDGET simultaneous optical observations
  65. GRB 060522: Swift/UVOT Observations: Correction
  66. GRB 060522: Swift/UVOT Observations of the Optical Afterglow
  67. XMM-Newton observation of GRB060510b
  68. GRB 060522: Swift/XRT Team refined analysis
  69. GRB 060522: Swift-BAT Refined Analysis
  70. GRB 060522: REM NIR observations
  71. GRB 060522: TNG optical observations
  72. GRB 060522: Swift detection of a burst with possible optical afterglow
  73. GRB 060512: reanalysis of optical spectra
  74. GRB 060515: NIR observation
  75. GRB 060210: Jet Break in the XRT light curve
  76. GRB 060516: Refined analysis of the Swift-BAT burst
  77. GRB 060512: TNG optical spectroscopy
  78. GRB 060516: Swift detection of a burst
  79. GRB 060505 BAT refined analysis
  80. GRB 060515 BAT refined analysis
  81. GRB 060512: TAROT optical observation
  82. GRB 060515: Swift/XRT Team refined analysis
  83. GRB 060515: Swift/UVOT Upper Limits
  84. GRB 060515: Swift/XRT position
  85. GRB 060515: Super-LOTIS Observations
  86. GRB060515: Swift/UVOT initial observation
  87. GRB 060515: TAROT optical observation
  88. GRB 060515: ROTSE-III Optical Limits
  89. GRB 060515: Swift detection of a burst
  90. VLT optical spectroscopy of GRB 060512
  91. Swift/UVOT observations of GRB060512.
  92. GRB 060512: Subaru NIR observation
  93. GRB060512: Swift XRT Team refined analysis
  94. GRB 060512: 1.54m Kuiper Observations
  95. GRB 060512: Detection of NIR afterglow
  96. GRB 060512: P60 Observations
  97. GRB 060512: Swift-BAT Refined Analysis
  98. GRB 060505 - OT candidate + galaxy spectrum
  99. GRB 060512: optical decay
  100. GRB 060512: REM NIR observations

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