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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"

24436 results found.

  1. GRB 100924A: Swift-BAT refined analysis
  2. GRB 100924A: Swift detection of a burst
  3. GRB 100915A: TAROT Calern observatory optical observations
  4. GRB100906A: Ashra-1 observation of early optical emission
  5. GRB 100917A: Swift-BAT refined analysis
  6. GRB100915A: MITSuME Ishigakijima Optical upper limits
  7. GRB 100915B: Fermi GBM observation
  8. GRB 100915A: Correction to Swift-BAT refined analysis
  9. GRB 100915A: Swift-BAT refined analysis
  10. GRB 100915B: a long GRB detected by INTEGRAL
  11. GRB 100910A: Fermi GBM detection
  12. GRB100909A: MITSuME Ishigakijima Optical upper limits
  13. GRB 100909A: Swift-XRT refined analysis
  14. GRB 100909A: Faulkes Telescope North afterglow candidate
  15. GRB 100909A: ROTSE-III Optical Limits
  16. GRB 100909A: a long GRB detected by INTEGRAL
  17. GRB100906A: detection at 15GHz
  18. GRB100901A: IAO optical upper limits at 4 days after the burst
  19. GRB 100906A: GRAS-007 optical observations
  20. GRB100906A: R band observations
  21. Konus-Wind observation of GRB 100906A
  22. GRB100906A: Optical observations at IAO
  23. GRB 100906A: Fermi GBM observation
  24. GRB 100906A: Observations at the Virtual Telescope
  25. GRB 100906A: Swift-XRT refined analysis
  26. GRB100906A: Errata of MITSuME Okayama about observation time
  27. GRB100906A: MITSuME Okayama Optical Observation
  28. GRB 100901A: TLS observations, SDSS calibration, decay slope
  29. GRB 100906A: MASTER preliminary prompt+afterglow lc
  30. GRB 100906A: Swift-BAT refined analysis
  31. GRB 100906A: MASTER preliminary polarization prompt light curve
  32. GRB 100906A : Faulkes Telescope North optical observations
  33. GRB 100906A: MASTER early OT observations
  34. GRB 100906A: Swift detection of a burst with an optical afterglow
  35. GRB 100829A: MASTER optical observations
  36. GRB100905A: Optical upper limits at IAO
  37. GRB100905A: MITSuME Okayama optical upper limits
  38. GRB 100905A: Swift-BAT refined analysis
  39. GRB100904A: BOOTES-3 Upper Limit
  40. GRB 100905A: MASTER Prompt Optical Observations
  41. GRB 100905A: Faulkes Telescope North observations
  42. Optical observations of GRB 100901A
  43. GRB10901A: Murikabushi telescope observation at 3 days after the burst
  44. GRB 100904A: Swift-BAT refined analysis
  45. GRB100902A: Optical upper limits at IAO
  46. GRB10901A: Optical observations at IAO
  47. Konus-Wind observation of GRB 100829A
  48. GRB 100902A: Swift-BAT refined analysis
  49. GRB 100901A: Lightbuckets Optical Observations
  50. GRB 100902A: 1.5m OSN I-band Upper Limits
  51. Tentative redshift of GRB100902A from Swift-XRT data
  52. GRB 100902A: Swift XRT refined analysis
  53. GRB 100902A: optical observation at Mt.Terskol
  54. GRB 100901A: optical observation at Mt.Terskol
  55. GRB 100901A: Kanata Telescope observation of the optical afterglow
  56. GRB100901A: MITSuME Okayama Optical Observation at 1 day after the burst
  57. GRB 100901A: TLS Observations: Break?
  58. GRB 100902A: MASTER Prompt Optical Observations
  59. GRB 100902A: Faulkes Telescope South observations
  60. GRB 100902A: MASTER Optical Early Limit
  61. GRB 100902A: Swift detection of a burst
  62. GRB 100901A: MASTER optical flare at 420s discovery
  63. GRB 100901A: Vega telescope optical afterglow observation
  64. GRB100901A: MITSuME Okayama Optical Observation
  65. GRB 100901A: Swift-XRT Team refined analysis
  66. GRB 100901A - NOT optical observation
  67. GRB 100901A: Swift-BAT refined analysis
  68. GRB 100901A: optical observation at Mt.Terskol
  69. GRB 100901A: MASTER power low decay
  70. GRB 100901A: MASTER: the OT brightenning
  71. GRB 100901A: MASTER Optical Early Limits
  72. GRB 100901A: Faulkes Telescope North afterglow candidate
  73. Konus-Wind observation of GRB 100826A
  74. GRB 100829.9: MASTER Optical Limits
  75. GRB100826A: Fermi-LAT Observations
  76. GRB 100823A: MAXI/GSC detection
  77. GRB100807A: R band observations
  78. GRB 100823A: Candidate IR afterglow
  79. GRB 100823A: TNG NIR observations
  80. GRB 100823: 1.5m OSN I-band observations
  81. GRB 100823A: Swift-BAT refined analysis
  82. GRB 100814A: Suzaku WAM observation of the prompt emission
  83. IBAS Alert n. 6057 is not due to a GRB
  84. EVLA radio afterglow detection of GRB 100814A
  85. GRB 100814B: Fermi GBM detection
  86. Konus-Wind observation of GRB 100816A
  87. GRB100816A: MITSuME optical upper limits
  88. GRB 100816A: 10.4-m GTC redshift confirmation
  89. GRB 100816A: Fermi GBM observation
  90. GRB 100814A: NOT optical observations
  91. GRB 100816A: NOT optical observations
  92. Konus-Wind observation of GRB 100814A
  93. GRB 100816A, Swift-BAT refined analysis
  94. GRB 100816A: Gemini-N imaging
  95. GRB 100816A: MASTER Optical Limits
  96. GRB100816A: TNG optical afterglow confirmation.
  97. GRB 100816A: ROTSE-III Optical Limits
  98. GRB 100816A: Swift detection of a possibly short burst with optical afterglow
  99. GRB 100814A: Fermi GBM observation
  100. GRB 100814A, Swift-BAT refined analysis

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