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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"

39331 results found.

  1. GRB 060124: XRT position
  2. GRB 060124: Optical Afterglow Candidate from Tautenburg
  3. GRB 050124 : Kiso Optical limit
  4. GRB 060124: Optical Observations at Tautenburg
  5. GRB 060117: Suzaku WAM observation of the prompt emission
  6. GRB060124:MASTER optical observation
  7. GRB 060111B: Suzaku WAM observation of the prompt emission
  8. GRB 060124: Swift-BAT detection of a burst
  9. GRB 060116: Radio Detection
  10. GRB 060116: MARGE optical observations
  11. GRB 060121: Swift/UVOT upper limits
  12. GRB 060121: Liverpool Telescopes optical limits
  13. GRB 060121: Swift XRT refined analysis
  14. Konus-Wind observation of GRB 060121
  15. GRB 060121: I-band Limits
  16. GRB 060121: Confirmation of Afterglow
  17. GRB 060121: candidate optical counterpart
  18. GRB 060121: Swift XRT refined position
  19. GRB060121: SARA Observations
  20. GRB 060121: optical observations
  21. GRB 060121: Infrared Observations
  22. GRB 060121: optical observations
  23. GRB 060121: Optical imaging
  24. GRB060121 - SDSS pre-burst observations
  25. GRB 060121: A short-hard GRB in a cluster?
  26. GRB 060121 (=H4010): Results of preliminary spectral analysis
  27. GRB 060121: A bright short/hard GRB localized by HETE-2 SXC
  28. GRB 060121: A bright short/hard GRB localized by HETE-2 WXM
  29. HETE Alert 4006: MASTER promt optical limit
  30. GRB 060117: PROMPT Observations
  31. GRB060117 - ATCA 3/6cm radio limits - correction
  32. GRB060117 - ATCA 3/6cm radio limits
  33. GRB 060116: photometric redshift - the farthest GRB?
  34. GRB 060117: pseudo-z from spectral parameters of the prompt emission
  35. Correction to GCN 4542 on GRB 060117
  36. Konus-Wind observation of GRB 060117
  37. GRB 060116: possible I-J dropout
  38. GRB 060116: UKIRT IR Observations
  39. GRB 060117: Refined analysis of the Swift-BAT burst
  40. GRB 060116: PROMPT Observations
  41. GRB 060117: FRAM refined analysis
  42. GRB 060117: FRAM optical afterglow candidate
  43. GRB 060117: nearby galaxy
  44. GRB 060117: Swift-BAT detection of a bright burst
  45. GRB 060116: VLT optical observations
  46. GRB 060116: Refined analysis of the Swift-BAT burst
  47. GRB 060115: PROMPT Observations
  48. GRB 060116: XRT refined analysis
  49. GRB 060116: IR Candidate Afterglow
  50. GRB 060116: Swift/UVOT upper limits
  51. GRB060115: REM observations
  52. GRB 060110: XRT position and analysis
  53. GRB 060116 : Lulin optical limit
  54. GRB 060116: ROTSE-III Optical Limits
  55. GRB060116: XRT position
  56. GRB060116: Faulkes North observation
  57. GRB 060115: absorption redshift
  58. GRB 060116: Swift-BAT detection of a burst
  59. GRB 060115: Refined analysis of the Swift-BAT burst
  60. GRB 060115: OT photometry with MITSuME
  61. GRB 060115: Swift/UVOT upper limits
  62. GRB 060114: REM observations
  63. GRB 060115: Swift XRT refined analysis
  64. GRB 060115: OT finding chart
  65. GRB 060114: Swift/UVOT Observations
  66. GRB 060115: MITSuME optical afterglow candidate
  67. GRB 060115: Swift detection of a burst
  68. GRB 060114: Swift XRT upper limit
  69. GRB 060114: refined position
  70. GRB 060114: A long GRB detected by INTEGRAL
  71. GRB060114: Faulkes North observation
  72. GRB 060108: IR observations of afterglow
  73. GRB060108: Faulkes North afterglow evidence
  74. GRB 060108: further analysis of VLT images
  75. GRB 060108: Evidence for an XRT Position Offset
  76. GRB 060110: KAIT observations
  77. GRB 060111B: Swift XRT refined analysis
  78. GRB 060111A: refined UVOT anaysis
  79. GRB 060111B: MITSuME detection of optical afterglow
  80. GRB 060111B: TAROT optical observation
  81. GRB060111A: RTT150 optical observations
  82. GRB060111B: RTT150, possible host galaxy
  83. GRB 060111B: Refined analysis of the Swift-BAT burst
  84. GRB 060110: MARGE observations
  85. GRB 060111(a): P60 Observations
  86. GRB 060111B: Gualba observatory limit
  87. GRB 060111B: ROTSE-III Detection of Optical Counterpart Flare
  88. GRB 060111B: Swift detection of a burst
  89. GRB 060111: Swift-BAT Refined Analysis
  90. GRB060111.2:_MASTER optical limit
  91. GRB 060108: VLT K-band observations
  92. GRB 060111: TAROT optical observation
  93. GRB 060111: possible UVOT counterpart
  94. GRB 060111: ROTSE-III Optical Limits
  95. GRB 060111: Swift detection of a burst
  96. GRB 060110: Mitsume optical observations
  97. GRB 060110: Swift-BAT refined analysis
  98. GRB 060109: Swift-BAT refined analysis
  99. GRB 060108: z-band imaging from Gemini-North
  100. GRB 060110a: RAPTOR detection of early optical emission.

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