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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"

36217 results found.

  1. HETE Alert 4006: MASTER promt optical limit
  2. GRB 060117: PROMPT Observations
  3. GRB060117 - ATCA 3/6cm radio limits - correction
  4. GRB060117 - ATCA 3/6cm radio limits
  5. GRB 060116: photometric redshift - the farthest GRB?
  6. GRB 060117: pseudo-z from spectral parameters of the prompt emission
  7. Correction to GCN 4542 on GRB 060117
  8. Konus-Wind observation of GRB 060117
  9. GRB 060116: possible I-J dropout
  10. GRB 060116: UKIRT IR Observations
  11. GRB 060117: Refined analysis of the Swift-BAT burst
  12. GRB 060116: PROMPT Observations
  13. GRB 060117: FRAM refined analysis
  14. GRB 060117: FRAM optical afterglow candidate
  15. GRB 060117: nearby galaxy
  16. GRB 060117: Swift-BAT detection of a bright burst
  17. GRB 060116: VLT optical observations
  18. GRB 060116: Refined analysis of the Swift-BAT burst
  19. GRB 060115: PROMPT Observations
  20. GRB 060116: XRT refined analysis
  21. GRB 060116: IR Candidate Afterglow
  22. GRB 060116: Swift/UVOT upper limits
  23. GRB060115: REM observations
  24. GRB 060110: XRT position and analysis
  25. GRB 060116 : Lulin optical limit
  26. GRB 060116: ROTSE-III Optical Limits
  27. GRB060116: XRT position
  28. GRB060116: Faulkes North observation
  29. GRB 060115: absorption redshift
  30. GRB 060116: Swift-BAT detection of a burst
  31. GRB 060115: Refined analysis of the Swift-BAT burst
  32. GRB 060115: OT photometry with MITSuME
  33. GRB 060115: Swift/UVOT upper limits
  34. GRB 060114: REM observations
  35. GRB 060115: Swift XRT refined analysis
  36. GRB 060115: OT finding chart
  37. GRB 060114: Swift/UVOT Observations
  38. GRB 060115: MITSuME optical afterglow candidate
  39. GRB 060115: Swift detection of a burst
  40. GRB 060114: Swift XRT upper limit
  41. GRB 060114: refined position
  42. GRB 060114: A long GRB detected by INTEGRAL
  43. GRB060114: Faulkes North observation
  44. GRB 060108: IR observations of afterglow
  45. GRB060108: Faulkes North afterglow evidence
  46. GRB 060108: further analysis of VLT images
  47. GRB 060108: Evidence for an XRT Position Offset
  48. GRB 060110: KAIT observations
  49. GRB 060111B: Swift XRT refined analysis
  50. GRB 060111A: refined UVOT anaysis
  51. GRB 060111B: MITSuME detection of optical afterglow
  52. GRB 060111B: TAROT optical observation
  53. GRB060111A: RTT150 optical observations
  54. GRB060111B: RTT150, possible host galaxy
  55. GRB 060111B: Refined analysis of the Swift-BAT burst
  56. GRB 060110: MARGE observations
  57. GRB 060111(a): P60 Observations
  58. GRB 060111B: Gualba observatory limit
  59. GRB 060111B: ROTSE-III Detection of Optical Counterpart Flare
  60. GRB 060111B: Swift detection of a burst
  61. GRB 060111: Swift-BAT Refined Analysis
  62. GRB060111.2:_MASTER optical limit
  63. GRB 060108: VLT K-band observations
  64. GRB 060111: TAROT optical observation
  65. GRB 060111: possible UVOT counterpart
  66. GRB 060111: ROTSE-III Optical Limits
  67. GRB 060111: Swift detection of a burst
  68. GRB 060110: Mitsume optical observations
  69. GRB 060110: Swift-BAT refined analysis
  70. GRB 060109: Swift-BAT refined analysis
  71. GRB 060108: z-band imaging from Gemini-North
  72. GRB 060110a: RAPTOR detection of early optical emission.
  73. GRB 060110: UKIRT K-band observations
  74. GRB 060110: ROTSE-III Confirmation of Optical Counterpart
  75. GRB 060110: IR Candidate Afterglow
  76. GRB 060110: Super-LOTIS observations
  77. GRB 060110: Optical observation
  78. GRB 060110: Correction
  79. Correction to GRB 060109 XRT analysis
  80. GRB 050110: IR Observations
  81. GRB 060110: Optical limit
  82. GRB 060110: Swift-BAT detection of a burst
  83. GRB 060109: Refined Swift-XRT analysis
  84. GRB 060109: Swift/UVOT upper limits
  85. GRB060109, optical observation
  86. GRB 060108: ISAS early observations and near IR upper limit
  87. GRB060108: P200 Ks Observations
  88. GRB 060108: early UKIRT K-band observations
  89. Swift UVOT correction to GCN 4455
  90. GRB 060109: Swift Detection of a long burst
  91. GRB 060108: a dark burst?
  92. GRB 060108: Refined XRT analysis
  93. GRB 060108: VLT J-band observations
  94. GRB 060108: Mitsume optical observations
  95. GRB 060108: Swift/UVOT upper limits
  96. GRB 060105: quick look analysis of the Suzaku/XIS afterglow observation
  97. GRB060108: SDSS pre-burst observations
  98. GRB060108: Faulkes Telescope observation
  99. GRB 060108: Refined analysis of the Swift-BAT burst
  100. GRB 060108: Swift XRT position

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