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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"

32763 results found.

  1. GRB 060121: Swift XRT refined position
  2. GRB060121: SARA Observations
  3. GRB 060121: optical observations
  4. GRB 060121: Infrared Observations
  5. GRB 060121: optical observations
  6. GRB 060121: Optical imaging
  7. GRB060121 - SDSS pre-burst observations
  8. GRB 060121: A short-hard GRB in a cluster?
  9. GRB 060121: A bright short/hard GRB localized by HETE-2 WXM
  10. GRB 060117: PROMPT Observations
  11. GRB060117 - ATCA 3/6cm radio limits - correction
  12. GRB060117 - ATCA 3/6cm radio limits
  13. GRB 060116: photometric redshift - the farthest GRB?
  14. Correction to GCN 4542 on GRB 060117
  15. Konus-Wind observation of GRB 060117
  16. GRB 060116: possible I-J dropout
  17. GRB 060116: UKIRT IR Observations
  18. GRB060108: photometric redshift determination
  19. GRB 060117: Refined analysis of the Swift-BAT burst
  20. GRB 060116: PROMPT Observations
  21. GRB 060117: FRAM refined analysis
  22. GRB 060117: FRAM optical afterglow candidate
  23. GRB 060117: nearby galaxy
  24. GRB 060116: VLT optical observations
  25. GRB 060116: Refined analysis of the Swift-BAT burst
  26. GRB 060115: PROMPT Observations
  27. GRB 060116: XRT refined analysis
  28. GRB 060116: IR Candidate Afterglow
  29. GRB 060116: Swift/UVOT upper limits
  30. GRB060115: REM observations
  31. GRB 060110: XRT position and analysis
  32. GRB 060116 : Lulin optical limit
  33. GRB 060116: ROTSE-III Optical Limits
  34. GRB060116: XRT position
  35. GRB 060115: absorption redshift
  36. GRB 060115: Refined analysis of the Swift-BAT burst
  37. GRB 060115: OT photometry with MITSuME
  38. GRB 060115: Swift/UVOT upper limits
  39. GRB 060114: REM observations
  40. GRB 060115: Swift XRT refined analysis
  41. GRB 060115: OT finding chart
  42. GRB 060114: Swift/UVOT Observations
  43. GRB060115, optical observation
  44. GRB 060115: MITSuME optical afterglow candidate
  45. GRB 060114: Swift XRT upper limit
  46. GRB060114, optical observation
  47. GRB 060108: IR observations of afterglow
  48. GRB 060108: further analysis of VLT images
  49. GRB 060108: Evidence for an XRT Position Offset
  50. GRB 060110: KAIT observations
  51. GRB 060111B: Swift XRT refined analysis
  52. GRB 060111A: refined UVOT anaysis
  53. GRB 060111B: MITSuME detection of optical afterglow
  54. GRB 060111B: TAROT optical observation
  55. GRB060111B: RTT150, possible host galaxy
  56. GRB 060111B: Refined analysis of the Swift-BAT burst
  57. GRB 060110: MARGE observations
  58. GRB 060111(a): P60 Observations
  59. GRB 060111B: Gualba observatory limit
  60. GRB 060111B: ROTSE-III Detection of Optical Counterpart Flare
  61. GRB 060111: Swift-BAT Refined Analysis
  62. GRB 060108: VLT K-band observations
  63. GRB 060111: TAROT optical observation
  64. GRB 060111: possible UVOT counterpart
  65. GRB060111 : XRT refined analysis
  66. GRB 060111: ROTSE-III Optical Limits
  67. GRB 060110: Mitsume optical observations
  68. GRB 060110: Swift-BAT refined analysis
  69. GRB 060109: Swift-BAT refined analysis
  70. GRB 060108: z-band imaging from Gemini-North
  71. GRB 060110a: RAPTOR detection of early optical emission.
  72. GRB 060110: UKIRT K-band observations
  73. GRB 060110: ROTSE-III Confirmation of Optical Counterpart
  74. GRB 060110: IR Candidate Afterglow
  75. GRB060110, optical observation
  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 060109: Refined Swift-XRT analysis
  83. GRB 060109: Swift/UVOT upper limits
  84. GRB060109, optical observation
  85. GRB 060108: ISAS early observations and near IR upper limit
  86. GRB060108: P200 Ks Observations
  87. GRB 060108: early UKIRT K-band observations
  88. Swift UVOT correction to GCN 4455
  89. GRB 060108: a dark burst?
  90. GRB 060108: Refined XRT analysis
  91. GRB 060108: VLT J-band observations
  92. GRB 060108: Mitsume optical observations
  93. GRB 060108: Swift/UVOT upper limits
  94. GRB 060105: quick look analysis of the Suzaku/XIS afterglow observation
  95. GRB060108: SDSS pre-burst observations
  96. GRB060108: Faulkes Telescope observation
  97. GRB 060108: Refined analysis of the Swift-BAT burst
  98. GRB 060108: Swift XRT position
  99. GRB 060105: Radio observations
  100. GRB 060105: MDM Observation

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