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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"

32725 results found.

  1. GRB 070508: OA fading and tentative redshift
  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: ROTSE-III Optical Limits
  6. GRB070508: Swift/UVOT Observations
  7. GRB 070508, SMARTS optical afterglow observation
  8. GRB 070508, Swift-BAT refined analysis
  9. GRB 070508: Multicolor optical observations and possible redshift limit
  10. GRB 070508: Swift-XRT refined analysis
  11. GRB 070508: Optical observation limiting magnitude
  12. GRB 070508: Optical afterglow detection
  13. GRB 070508: REM observations
  14. GRB070412: MAGIC telescope GeV observation
  15. Swift-BAT trigger 278809 is not a GRB
  16. GRB 070506: VLT redshift
  17. GRB070506: Swift/UVOT Observations
  18. GRB070506: Swift XRT refined analysis
  19. GRB 070506, Swift-BAT Refined Analysis
  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 070429B: Swift XRT refined analysis
  34. GRB 070429B: ROTSE-III Optical Limits
  35. GRB 070429: ROTSE-III Optical Limits
  36. GRB 070427, Swift-BAT Refined Analysis
  37. LT monitoring of GRB070412
  38. GRB 070411, further deep LBT photometry
  39. GRB 070411: Late-time Keck imaging
  40. GRB070419B: Suzaku WAM observation of the prompt emission
  41. GRB 070420, SMARTS optical/IR afterglow observations
  42. GRB 070411, deep LBT photometry
  43. Konus-Wind observation of GRB 070420
  44. GRB 070411: break in the optical light curve
  45. GRB 070420 Swift-BAT Refined Analysis
  46. GRB070419A: Kuiper Optical detection
  47. GRB070419a: Swift UVOT observations
  48. GRB 070419A: MARGE Observations
  49. GRB 070420: optical rebrightening observed at Mt. John
  50. GRB 070420: Swift XRT refined analysis
  51. GRB070420: Swift UVOT continuing observations
  52. GRB 070411: BART early limit
  53. GRB 070420: Faulkes Telescope South Observations
  54. GBR 070419A: Swift/XRT refined analysis
  55. GRB 070420: NIR and optical afterglow confirmed
  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. GRB070419B: Confirmation of Optical Transient
  61. GRB 070419A: RAPTOR Detection of Early Emission
  62. GRB 070419B: Swift XRT refined analysis
  63. GRB 070419: Keck/LRIS Absorption Redshift
  64. GRB 070419A, Optical observations
  65. GRB 070411: Deep VLT detection
  66. GRB 070419A: SARA observations
  67. GRB 070419A: NAYUTA Optical Observation
  68. GRB 070419A: Faulkes Telescope North Optical Observations
  69. GRB 070419B optical afterglow candidate
  70. GRB 070419A: Optical and IR observations with KANATA
  71. GRB 070419B: optical afterglow candidate
  72. GRB070419A, optical observation
  73. Infrared detection of GRB070419A with UKIRT
  74. GRB070330: Correction to UVOT position
  75. GRB 070419: P60 Confirmation of Optical Afterglow
  76. GRB 070419 optical afterglow candidate
  77. GRB 070419A: ROTSE-III Optical Limits
  78. Swift-BAT Trigger 276045 is a Cosmic Ray Shower event
  79. GRB 070418: Optical and IR observations with KANATA
  80. GRB 070406: Swift XRT refined analysis
  81. GRB 070318, SMARTS optical/IR afterglow observations
  82. GRB 070411: TLS data shows plateau, flares
  83. GRB070412: Swift UVOT observations
  84. GRB 070411: Swift/UVOT observations
  85. GRB 070412, Swift-BAT refined analysis
  86. GRB 070412 Liverpool Telescope optical limit
  87. GRB 070411: Optical photometry at Crni Vrh
  88. GRB 070412: Swift-XRT refined analysis
  89. GRB 070411: Swift-XRT refined analysis
  90. GRB 070412: further reanalysis of NOT images
  91. GRB 070412: Optical observations at Crni Vrh
  92. GRB 070411: OA redshift
  93. GRB 070412: Swift-XRT refined position
  94. GRB 070412: further NOT observations
  95. GRB 070412: Gemini/GMOS afterglow candidate
  96. GRB 070412: IAC80 optical afterglow candidate
  97. GRB 070412: NOT observations
  98. GRB 070412: Nearby bright galaxy
  99. GRB 070411, Swift-BAT refined analysis
  100. GRB 070411 : Liverpool Telescope Observations

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