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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"

32692 results found.

  1. GRB060602A: Bootes-IR observations
  2. GRB 060602B: Swift detection of a burst
  3. GRB060602B: Watcher observations - no OT candidate
  4. GRB060602B: BOOTES-IR candidate afterglow
  5. GRB 060502A: Optical afterglow observations
  6. GRB 060526: Break in X-ray light curve
  7. GRB 060526: RTT150 optical observations
  8. GRB060526, optical observations
  9. GRB 051227 : WIDGET simultaneous optical observations
  10. GRB 051028 : WIDGET pre-trigger limit
  11. GRB 060526: RTT150 optical observations
  12. GRB 060526: Multiple Optical Flares
  13. GRB060526: afterglow fitting and probable jet break
  14. GRB 060526: RTT150 optical observations
  15. GRB060526: Optical counterpart from MIRO
  16. GRB060502b: optical observations
  17. GRB 060526: RTT150 optical observations
  18. GRB 060526: Tautenburg OT observation and light curve fitting
  19. GRB060526: optical observations
  20. GRB 060526: SMARTS optical/IR afterglow observations
  21. GRB060526: possible break in the optical light curve
  22. GRB 060526: REM observations
  23. GRB 060526: RTT150 optical observations, afterglow flattening
  24. GRB 060526: Optical Flare
  25. GRB 060526: MDM-2.4m Observations
  26. GRB 060526: Refined analysis of the Swift-BAT burst
  27. GRB 060526: RTT150 optical observations
  28. GRB060526: Further Swift-UVOT Observations
  29. GRB 060526: Magellan Redshift
  30. GRB 060526: Swift/XRT Team refined analysis
  31. GRB 060526: TNG optical observations
  32. GRB 060526: ROTSE-III Observations of Optical Counterpart
  33. GRB 060526: Watcher Observations
  34. GRB060526 - SDSS Pre-burst Observations
  35. GRB 060526: Continued emission for the Swift burst
  36. GRB060505: VLT observations of the optical afterglow
  37. GRB 060413 : WIDGET simultaneous optical observations
  38. GRB 060522: Swift/UVOT Observations: Correction
  39. GRB 060522: Swift/UVOT Observations of the Optical Afterglow
  40. XMM-Newton observation of GRB060510b
  41. GRB060512: Late-Time P200 Observations
  42. GRB060522: z = 5.11 Keck-LRIS Redshift
  43. GRB 060522: Swift/XRT Team refined analysis
  44. GRB 060522: Swift-BAT Refined Analysis
  45. GRB 060522: REM NIR observations
  46. GRB 060522: TNG optical observations
  47. GRB 060512: reanalysis of optical spectra
  48. GRB 060515: NIR observation
  49. GRB 060210: Jet Break in the XRT light curve
  50. GRB 060516: Refined analysis of the Swift-BAT burst
  51. GRB 060512: TNG optical spectroscopy
  52. GRB060515: P200 NIR Observations
  53. GRB 060505 BAT refined analysis
  54. GRB 060515 BAT refined analysis
  55. GRB 060515: Swift/XRT Team refined analysis
  56. GRB 060515: Swift/UVOT Upper Limits
  57. GRB 060515: Swift/XRT position
  58. GRB 060515: Super-LOTIS Observations
  59. GRB060515: Swift/UVOT initial observation
  60. GRB 060515: ROTSE-III Optical Limits
  61. VLT optical spectroscopy of GRB 060512
  62. Swift/UVOT observations of GRB060512.
  63. GRB 060512: Subaru NIR observation
  64. GRB060512: Swift XRT Team refined analysis
  65. GRB 060512: 1.54m Kuiper Observations
  66. GRB 060512: Detection of NIR afterglow
  67. GRB 060512: P60 Observations
  68. GRB 060512: Swift-BAT Refined Analysis
  69. GRB 060505 - OT candidate + galaxy spectrum
  70. GRB 060512: optical decay
  71. GRB 060512: REM NIR observations
  72. GRB060512 - SDSS Pre-Burst Observations
  73. GRB060512 Name Correction: LT Afterglow detection
  74. GRB060512: Liverpool Telescope Afterglow detection
  75. GRB 060510A: Swift/UVOT Detection of an Optical Afterglow
  76. GRB 060505: X-ray afterglow - Correction -
  77. GRB 060505: X-ray afterglow
  78. Konus-Wind observation of GRB 060510A
  79. GRB060418: optical observations
  80. GRB 060428a, SMARTS optical/IR afterglow detection
  81. GRB060510B: Swift XRT refined analysis
  82. GRB 060510B: Swift/UVOT Upper Limits
  83. GRB 060510A: Refined analysis of the Swift-BAT burst
  84. GRB 060510B: Swift-BAT Refined Analysis
  85. GRB060510A: XRT refined analysis
  86. GRB060510 - SDSS Pre-Burst Observations
  87. GRB 060510b: Redshift
  88. GRB060510B : Faulkes North Telescope detection
  89. GRB 060510b: Gemini NIR observations
  90. GRB 060510B: Super-LOTIS Observations
  91. GRB 060510b: NIR observations
  92. GRB 060510B: Coordinate correction
  93. GRB 060510B: MDM Observations and candidate OT
  94. GRB 060510: Swift detection of a burst with optical transient
  95. GRB060507: optical afterglow detection
  96. GRB060502B: improvement in the XRT afterglow position
  97. GRB 060507: BART limit
  98. GRB 060507: Final Refined analysis of the Swift-BAT burst
  99. GRB 060507: Swift-BAT Refined Analysis
  100. GRB 060505: PROMPT Observations

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