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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"

21525 results found.

  1. GRB070509: Swift-XRT Refined Analysis
  2. GRB 070509, Swift-BAT refined analysis
  3. GRB 070508: Suzaku/WAM observation of the prompt emission
  4. GRB 070509: REM observations
  5. GRB 070509: Swift detection of a burst
  6. GRB 070509: ROTSE-III Optical Limits
  7. GRB070508: Swift/UVOT Observations
  8. GRB 070508, Swift-BAT refined analysis
  9. GRB 070508: Swift-XRT refined analysis
  10. GRB 070508: Optical afterglow detection
  11. GRB 070508: TAROT La Silla observatory optical observations
  12. GRB 070508: Swift detection of an intense burst with an optical counterpart
  13. GRB070412: MAGIC telescope GeV observation
  14. Swift-BAT trigger 278809 is not a GRB
  15. GRB 070507: Swift detection of a possible cosmic ray shower event or a possible burst
  16. GRB070506: Swift/UVOT Observations
  17. GRB070506: Swift XRT refined analysis
  18. GRB 070506, Swift-BAT Refined Analysis
  19. GRB 070506: Swift detection of a burst with optical afterglow
  20. GRB 070412, deep LBT imaging
  21. GRB 070429A: Swift XRT further analysis
  22. GRB070429B: VLT observations
  23. GRB 070429A: optical observations
  24. GRB070429B: position correction
  25. GRB 070309: Swift-XRT afterglow confirmation
  26. GRB070429B: possible host galaxy detection
  27. VLA observation of GRB 070429B
  28. Swift/UVOT observations of GRB070429B
  29. GRB 070429B, Swift-BAT refined analysis
  30. Swift/UVOT observations of GRB070429A
  31. GRB 070429A: Swift XRT refined analysis
  32. GRB 070429A, Swift-BAT refined analysis
  33. GRB 070429A: optical and NIR observations
  34. GRB 070429B: Swift XRT refined analysis
  35. GRB 070429B: ROTSE-III Optical Limits
  36. GRB 070429B: Swift detection of a short burst
  37. GRB 070429: ROTSE-III Optical Limits
  38. GRB 070429: Swift detection of a burst
  39. GRB 070427, Swift-BAT Refined Analysis
  40. GRB 070427: Swift detection of a burst
  41. GRB070419B: Suzaku WAM observation of the prompt emission
  42. GRB 070411, deep LBT photometry
  43. GRB 070420: pseudo-z~1.56 from spectral parameters of the prompt
  44. GRB 070420 Swift-BAT Refined Analysis
  45. GRB070419A: Kuiper Optical detection
  46. GRB070419a: Swift UVOT observations
  47. GRB 070419A: MARGE Observations
  48. GRB 070420: optical rebrightening observed at Mt. John
  49. GRB 070420: Swift XRT refined analysis
  50. GRB070420: Swift UVOT continuing observations
  51. GRB 070420: Faulkes Telescope South Observations
  52. GBR 070419A: Swift/XRT refined analysis
  53. GRB 070420: TAROT La Silla observatory optical observations
  54. GRB 070420: NIR and optical afterglow confirmed
  55. GRB 070420: Swift detection of a burst with optical afterglow
  56. GRB 070419A: MITSuME Okayama Observations
  57. GRB 070419A: Early Super-LOTIS Observations
  58. GRB 070419B, Swift-BAT refined analysis
  59. GRB 070419A Swift-BAT Refined Analysis
  60. GRB 070419A: RAPTOR Detection of Early Emission
  61. GRB 070419B: Swift XRT refined analysis
  62. GRB 070419A, Optical observations
  63. GRB070419 - SDSS Pre-Burst Observations
  64. GRB 070419A: Faulkes Telescope North Optical Observations
  65. GRB 070419B optical afterglow candidate
  66. GRB 070419B: optical afterglow candidate
  67. GRB070419A, optical observation
  68. GRB070330: Correction to UVOT position
  69. GRB 070419B: Swift detection of a burst
  70. GRB 070419 optical afterglow candidate
  71. GRB 070419A: ROTSE-III Optical Limits
  72. GRB 070419: Swift detection of a burst
  73. Swift-BAT Trigger 276045 is a Cosmic Ray Shower event
  74. Trigger 276045: Swift detection of a possible burst
  75. GRB 070406: Swift XRT refined analysis
  76. GRB 070411: TLS data shows plateau, flares
  77. GRB070412: Swift UVOT observations
  78. GRB 070411: Swift/UVOT observations
  79. GRB 070412, Swift-BAT refined analysis
  80. GRB 070412 Liverpool Telescope optical limit
  81. GRB 070412: Swift-XRT refined analysis
  82. GRB 070411: Swift-XRT refined analysis
  83. GRB 070412: further reanalysis of NOT images
  84. GRB 070412: Optical observations at Crni Vrh
  85. GRB 070412: Swift-XRT refined position
  86. GRB 070412: further NOT observations
  87. GRB 070412: Gemini/GMOS afterglow candidate
  88. GRB 070412: NOT observations
  89. GRB 070412: Nearby bright galaxy
  90. GRB 070411, Swift-BAT refined analysis
  91. GRB 070412: Swift detection of a burst
  92. GRB 070411: ROTSE-III Detection of Optical Counterpart
  93. GRB 070411: Tautenburg RRM Afterglow Confirmation
  94. GRB 070411: Swift detection of a burst with optical afterglow
  95. GRB 070406: "Star" in XRT error circle S2 is an AGN?
  96. GRB 070406: Swift XRT team further analysis
  97. GRB 070406: Astrometrically Refined XRT Position, Unfading Source
  98. GRB 070406: Bright galaxy in XRT error circle is a quasar
  99. GRB 070406, Swift-BAT refined analysis
  100. GRB 070406: Gemini South Imaging and XRT analysis

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