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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"

28260 results found.

  1. GRB060526: optical observations
  2. GRB 060526: REM observations
  3. GRB 060526: RTT150 optical observations, afterglow flattening
  4. GRB 060526: MDM-2.4m Observations
  5. GRB 060526: Refined analysis of the Swift-BAT burst
  6. GRB 060526: RTT150 optical observations
  7. GRB060526, optical observations
  8. GRB 060526: Swift/XRT Team refined analysis
  9. GRB 060526: ROTSE-III Observations of Optical Counterpart
  10. GRB 060526: Watcher Observations
  11. GRB060526 - SDSS Pre-burst Observations
  12. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  13. GRB 060413 : WIDGET simultaneous optical observations
  14. XMM-Newton observation of GRB060510b
  15. GRB060512: Late-Time P200 Observations
  16. GRB 060522: Swift-BAT Refined Analysis
  17. GRB 060522: REM NIR observations
  18. GRB 060522: TNG optical observations
  19. GRB 060515: NIR observation
  20. GRB 060210: Jet Break in the XRT light curve
  21. GRB 060516: Refined analysis of the Swift-BAT burst
  22. GRB060515: P200 NIR Observations
  23. GRB 060505 BAT refined analysis
  24. GRB 060515 BAT refined analysis
  25. GRB 060512: TAROT optical observation
  26. GRB 060515: Swift/XRT Team refined analysis
  27. GRB 060515: Swift/UVOT Upper Limits
  28. GRB 060515: Swift/XRT position
  29. GRB 060515: Super-LOTIS Observations
  30. GRB 060515: TAROT optical observation
  31. GRB 060512: Subaru NIR observation
  32. GRB060512: Swift XRT Team refined analysis
  33. GRB 060512: 1.54m Kuiper Observations
  34. GRB 060512: Detection of NIR afterglow
  35. GRB 060512: P60 Observations
  36. GRB 060512: Swift-BAT Refined Analysis
  37. GRB 060512: REM NIR observations
  38. GRB060512 - SDSS Pre-Burst Observations
  39. GRB 060512: Swift detection of a burst with an optical afterglow
  40. GRB 060505: X-ray afterglow - Correction -
  41. GRB 060505: X-ray afterglow
  42. Konus-Wind observation of GRB 060510A
  43. GRB060418: optical observations
  44. GRB 060428a, SMARTS optical/IR afterglow detection
  45. GRB060510B: Swift XRT refined analysis
  46. GRB 060510A: Refined analysis of the Swift-BAT burst
  47. GRB 060510B: Swift-BAT Refined Analysis
  48. GRB060510A: XRT refined analysis
  49. GRB060510 - SDSS Pre-Burst Observations
  50. GRB 060510B: Swift detection of a burst
  51. GRB 060510: Swift detection of a burst with optical transient
  52. GRB060507: optical afterglow detection
  53. GRB060502B: improvement in the XRT afterglow position
  54. GRB 060507: Final Refined analysis of the Swift-BAT burst
  55. GRB 060507: Swift-BAT Refined Analysis
  56. GRB 060505: PROMPT Observations
  57. GRB 060507: Swift XRT Team Refined Analysis
  58. GRB 060507: Swift detection of a burst
  59. GRB 060429: Suzaku WAM observation
  60. GRB060505: Swift/UVOT Observations
  61. GRB060425: new MASTER survey method
  62. GRB 060306: Further Analysis of SOAR and APO NIR Observations
  63. GRB 060505: Swift XRT afterglow canditate position
  64. GRB 060502b: Second epoch Gemini observations
  65. GRB 060505: Swift-BAT detection of a weak burst
  66. GRB 060428B: spectroscopy
  67. GRB 060502B: optical observations
  68. GRB 060502B: AROMA refined photometric calibration
  69. GRB 060502B MDM Follow-up Observation
  70. GRB 060502b: Gemini imaging and spectroscopy
  71. GRB060502A, optical observation
  72. GRB 060502B: Swift/UVOT upper limits
  73. GRB 060502A: Swift/UVOT source detection
  74. GRB 060502B: MDM Optical Observation
  75. GRB 060502B: Refined analysis of the Swift-BAT short burst
  76. GRB060502B: Swift XRT Team refined analysis
  77. GRB 060501: P60 Observations and Candidate Retraction
  78. GRB 060502B: Xinglong optical observation
  79. GRB060502: Swift-XRT refined analysis
  80. GRB 060502: Swift-BAT refined analysis
  81. GRB060501: Swift UVOT followup observations
  82. GRB 060502: P60 Afterglow Confirmation
  83. GRB 060502: Swift detection of a burst with an optical counterpart
  84. GRB060501: P60 imaging and afterglow candidate
  85. GRB 060501: Refined analysis of the Swift-BAT burst
  86. GRB060428B - SDSS Pre-Burst Observations
  87. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  88. GRB 060428B: MDM Observations
  89. GRB060428B: Swift XRT Team refined analysis
  90. GRB 060427B: IPN localization of a short hard burst
  91. GRB 060428B: Refined analysis of the Swift-BAT burst
  92. GRB 060428B: Xinglong I-band limit
  93. GRB 051117A: Bright host galaxy not confirmed
  94. GRB060428A: Swift/UVOT observations.
  95. GRB060428B, optical observation
  96. GRB 060428A: Refined analysis of the Swift-BAT burst
  97. GRB 060428b : Kiso R-band limit
  98. GRB 060428b: Optical afterglow candidate
  99. GRB060428A: Swift XRT Team refined analysis
  100. GRB 060428B: Swift detection of a burst

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