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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"

28124 results found.

  1. GRB 070311: MDM Optical Monitoring
  2. VLA observation of GRB 070311
  3. GRB 070311: Tautenburg sees afterglow fading
  4. GRB 070311: Optical observation.
  5. GRB 070311: Optical Brightening
  6. GRB 070311: SARA upper limit
  7. GRB 070309: variability of the XRT afterglow candidate
  8. GRB 070311: MDM Optical Follow-up
  9. GRB 070311: RAPTOR Detection of Optical Emission
  10. GRB 070311: P60 Observations
  11. GRB 070311: MDM Optical Detection
  12. GRB 070311: Swift/UVOT Upper Limits
  13. GRB 070311: MITSuME Okayama Optical Observation
  14. GRB 070311: Swift-XRT refined analysis
  15. GRB 070311: PAIRITEL confirmation of variability of REM candidate
  16. GRB 070311: REM candidate afterglow
  17. GRB060901: Candidate optical afterglow
  18. GRB070309: Swift/XRT possible afterglow detection
  19. GRB 070125: Chandra X-ray Confirmation of Jet Break
  20. GRB 070306, optical observation
  21. GRB 070125: X-ray light curve analysis
  22. VLA observation of GRB 070306
  23. GRB 070306: NOT observations
  24. GRB 070306 Swift/UVOT refined analysis
  25. GRB070306: confirmation of near infrared afterglow
  26. GRB 070306: ART-3 early optical and near infrared constraints
  27. GRB 070306: IR observations and candidate afterglow
  28. GRB 070306: XRT Team Refined Analysis
  29. GRB 070306: Optical and IR observations with KANATA
  30. GRB 070306: Swift detection of a burst
  31. GRB 070223: NIR observations at WHT
  32. GRB070227: Swift-XRT refined analysis
  33. GRB 060605 new redshift
  34. GRB 070125, deep late-time optical observation
  35. VLA observation of GRB 070224
  36. GRB 070223: Optical Observations
  37. GRB 070227: Swift/UVOT Upper Limits
  38. GRB 070227: TAROT La Silla observatory optical observations
  39. GRB070227: possible X-ray afterglow detection
  40. GRB 070227: Swift detection of a burst in ground analysis
  41. GRB 920925C: optical afterglow candidate
  42. GRB 070224: Optical afterglow confirmation
  43. GRB 070224: Swift/UVOT Upper Limits
  44. GRB070224: Swift-XRT Astrometrically Corrected Position
  45. VLA observation of GRB 070223
  46. VLA observation of GRB 070220
  47. GRB 070224: WHT K-band imaging
  48. GRB070224: Gemini Imaging Observations
  49. GRB070224: Swift-XRT Refined Analysis
  50. GRB 070224: optical afterglow candidate
  51. GRB 070224: Swift detection of a burst
  52. GRB 070223: Optical observations
  53. GRB070223: Swift/UVOT refined analysis
  54. GRB 070223: Optical-IR observation with KANATA
  55. GRB 070223: Swift-XRT Refined Analysis
  56. GRB 070223: Liverpool Telescope Possible Afterglow Candidate
  57. GRB 070223: MDM Observations
  58. GRB070223: Swift burst
  59. Konus-Wind and Konus-A observations of GRB 070220
  60. GRB 070220: MITSuME Okayama Optical Observation
  61. GRB 070220: ART-3 Optical and NIR limits
  62. Swift/UVOT refined analysis of GRB070220
  63. GRB 070209: Swift XRT refined analysis
  64. GRB 070220: Swift-XRT Refined Analysis
  65. GRB 070220: Observation with the KANATA 1.5m telescope
  66. GRB 070219: Gemini Observations
  67. GRB 070220 : Faulkes Telescope North optical limit
  68. GRB 070220: Swift detection of a burst
  69. GRB 070219: XRT Refined Analysis
  70. GRB 070219: Swift/UVOT Upper limits
  71. GRB 070219: I-band observations
  72. GRB 070219: optical TNG observations
  73. GRB 070219: Liverpool Telescope Observations
  74. GRB 070219: Swift detection of a burst
  75. GRB 070209: Redshift of a galaxy in the error circle of XRT source
  76. GRB 060927: PROMPT Observations
  77. GRB 070129: MDM I-band Detection
  78. GRB 070125: Break in Optical Decay
  79. GRB 070209: Swift XRT analysis
  80. GRB 070209: Swift detection of a short hard burst
  81. GRB 070208: Swift XRT refined analysis
  82. GRB 070208: RAPTOR detection of early afterglow onset
  83. GRB070208: Absorption and emission redshift from Gemini
  84. GRB 070208: MDM Optical Decay
  85. GRB 070208: Early IR detection and afterglow astrometry
  86. GRB 070208: Afterglow confirmation from P60
  87. GRB070208: Faulkes Telescope North Afterglow Identification
  88. GRB 070208: ROTSE-III Optical Limits
  89. GRB 070208: MDM Observations
  90. GRB 070208: Swift detection of a burst
  91. GRB 070125 detection with CARMA
  92. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  93. GRB 070129: afterglow confirmation
  94. GRB070124: Swift-XRT Follow-up Observation
  95. GRB070126: Swift-XRT Observation
  96. GRB 070129: Swift/UVOT Upper limits
  97. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  98. GRB 070125: optical observation
  99. GRB 070125: WSRT Radio Detection
  100. GRB070129: MITSuME optical observation

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