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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').
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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"
  1. GRB060510A: XRT refined analysis
  2. GRB060510 - SDSS Pre-Burst Observations
  3. GRB 060510b: Redshift
  4. GRB060510B : Faulkes North Telescope detection
  5. GRB 060510B : Planned XMM-Newton observation
  6. GRB 060510b: Gemini NIR observations
  7. GRB 060510B: Super-LOTIS Observations
  8. GRB 060510b: NIR observations
  9. GRB 060510B: Coordinate correction
  10. GRB 060510B: MDM Observations and candidate OT
  11. GRB 060510B: Swift detection of a burst
  12. GRB 060510: Swift detection of a burst with optical transient
  13. GRB060507: optical afterglow detection
  14. GRB060502B: improvement in the XRT afterglow position
  15. GRB 060507: BART limit
  16. GRB 060507: Final Refined analysis of the Swift-BAT burst
  17. GRB 060507: Swift-BAT Refined Analysis
  18. GRB 060505: PROMPT Observations
  19. GRB 060507: Swift/UVOT Upper Limits
  20. GRB 060507: Swift XRT Team Refined Analysis
  21. GRB 060507: MDM Optical Upper Limit
  22. GRB060507: Swift XRT position
  23. GRB 060507: Swift detection of a burst
  24. GRB 060429: Suzaku WAM observation
  25. GRB060505: Swift/UVOT Observations
  26. GRB 060505: Swift XRT Team Refined Analysis
  27. GRB060425: new MASTER survey method
  28. GRB 060306: Further Analysis of SOAR and APO NIR Observations
  29. GRB 060505: Swift XRT afterglow canditate position
  30. GRB 060502b: Second epoch Gemini observations
  31. GRB 060505: Swift-BAT detection of a weak burst
  32. GRB 060428B: spectroscopy
  33. GRB 060502B: optical observations
  34. GRB 060502B: AROMA refined photometric calibration
  35. GRB 060502B MDM Follow-up Observation
  36. GRB 060502b: Gemini imaging and spectroscopy
  37. GRB060502A, optical observation
  38. GRB 060502B: Swift/UVOT upper limits
  39. GRB 060502A: Swift/UVOT source detection
  40. GRB 060429: Refined IPN error box and Konus-Wind spectrum
  41. GRB 060502B: MDM Optical Observation
  42. GRB 060502B: AROMA optical observations
  43. GRB 060502B: Refined analysis of the Swift-BAT short burst
  44. GRB060502B: Swift XRT Team refined analysis
  45. Short GRB 060502B: Tautenburg Observation
  46. GRB 060427B Milagro GeV/TeV Observations
  47. GRB 060502A: TTT Observations
  48. GRB060502B: correction to XRT position
  49. GRB 060501: P60 Observations and Candidate Retraction
  50. GRB 060502B: Xinglong optical observation
  51. GRB 060502B: MASTER optical observations
  52. GRB 060502B: Swift detection of a short burst
  53. GRB060502: Swift-XRT refined analysis
  54. GRB 060502: Swift-BAT refined analysis
  55. GRB060502: Gemini spectroscopy
  56. GRB 060502: APO Spectroscopic Observations
  57. GRB060501: Swift UVOT followup observations
  58. GRB060502: Super-LOTIS Observations
  59. GRB 060502: P60 Afterglow Confirmation
  60. GRB 060502: Swift detection of a burst with an optical counterpart
  61. GRB 060501: MDM Observations
  62. GRB060501: Super-LOTIS observations
  63. GRB060501: P60 imaging and afterglow candidate
  64. GRB 060501: Refined analysis of the Swift-BAT burst
  65. GRB060501: Swift XRT position
  66. GRB 060501: ROTSE-III Optical Limits
  67. GRB 060501: Swift detection of a burst
  68. IPN triangulation of GRB060429 (short/hard)
  69. Konus-Wind observation of GRB 060427B
  70. GRB060428B - SDSS Pre-Burst Observations
  71. GRB060428B: optical observation
  72. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  73. GRB 060428B: MDM Observations
  74. GRB 060428A: PROMPT Observations
  75. GRB 060427B: MASTER optical observations
  76. GRB060428B: Swift XRT Team refined analysis
  77. GRB 060427B: IPN localization of a short hard burst
  78. GRB 060428B: Refined analysis of the Swift-BAT burst
  79. GRB 060428B: Xinglong I-band limit
  80. GRB 060428B: KAIT observations
  81. GRB060425:MASTER optical limit
  82. GRB 051117A: Bright host galaxy not confirmed
  83. GRB060428A: Swift/UVOT observations.
  84. GRB060428B, optical observation
  85. GRB 060428A: Refined analysis of the Swift-BAT burst
  86. GRB 060428b : Kiso R-band limit
  87. GRB060427:MASTER optical limit
  88. GRB 060428b: Optical afterglow candidate
  89. GRB060428A: Swift XRT Team refined analysis
  90. GRB 060428B: Swift detection of a burst
  91. GRB 060427: NIR observations
  92. GRB060427: Xinglong optical Observations
  93. GRB 060428: Swift detection of a burst
  94. GRB 060427: NOT observations
  95. GRB 060427: Swift/UVOT upper limits.
  96. GRB 060427: Refined analysis of the Swift-BAT burst
  97. GRB060427: Swift XRT Team refined analysis
  98. GRB060418: Swift XRT Team Further Refined Analysis
  99. GRB060425:MASTER survey observations
  100. GRB 060427, optical observation

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