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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"

32685 results found.

  1. GRB 100901A: CrAO optical observations
  2. GRB 100906A: RTT150 optical observations
  3. GRB 100906A: GRAS-007 optical observations
  4. GRB100906A: R band observations
  5. Konus-Wind observation of GRB 100906A
  6. GRB100906A: Optical observations at IAO
  7. GRB 100906A: Fermi GBM observation
  8. GRB 100906A: TLS Monitoring
  9. GRB 100901A: TLS Detection at 5.5 days
  10. GRB 100906A: Observations at the Virtual Telescope
  11. GRB 100906A: Swift-XRT refined analysis
  12. GRB 100906A: Swift/UVOT Observations
  13. GRB100906A: Errata of MITSuME Okayama about observation time
  14. GRB100906A: MITSuME Okayama Optical Observation
  15. GRB 100906A: Ondrejov 65cm observations
  16. GRB 100906A: TLS Multicolor Observations
  17. GRB 100905A: Swift/UVOT Upper Limits
  18. GRB 100901A: TLS observations, SDSS calibration, decay slope
  19. GRB 100906A: MASTER preliminary prompt+afterglow lc
  20. GRB 100901A: ISON-NM optical observations
  21. GRB 100906A: Swift-BAT refined analysis
  22. GRB 100906A: UKIRT zYJHK Observation
  23. GRB 100906A: MASTER preliminary polarization prompt light curve
  24. GRB 100906A: Gemini-N/GMOS redshift
  25. GRB 100906A : Faulkes Telescope North optical observations
  26. GRB 100906A: MASTER early OT observations
  27. GRB 100829A: MASTER optical observations
  28. GRB100905A: Optical upper limits at IAO
  29. GRB100905A: MITSuME Okayama optical upper limits
  30. GRB 100905A: Swift-XRT refined analysis.
  31. GRB 100905A: UKIRT zJHK Observation
  32. GRB 100901A: Possible WSRT Radio Detection
  33. GRB 100905A: Swift-BAT refined analysis
  34. GRB100904A: BOOTES-3 Upper Limit
  35. GRB 100905A: MASTER Prompt Optical Observations
  36. GRB 100905A: Faulkes Telescope North observations
  37. Optical observations of GRB 100901A
  38. GRB10901A: Murikabushi telescope observation at 3 days after the burst
  39. GRB 100902A: UKIRT JK Observation
  40. GRB 100902A: GROND observations; afterglow candidate
  41. GRB 100901A: UKIRT zYJHK Observation
  42. GRB 100904A: Swift-BAT refined analysis
  43. GRB10901A: Optical observations at IAO
  44. Konus-Wind observation of GRB 100829A
  45. GRB 100902A: Swift-BAT refined analysis
  46. GRB 100901A: optical observation at Mt.Terskol
  47. GRB 100901A: multicolor photometry at Mt.Terskol
  48. GRB 100901A: Lightbuckets Optical Observations
  49. GRB 100901A: HCT optical observations
  50. Tentative redshift of GRB100902A from Swift-XRT data
  51. GRB 100902A: Swift XRT refined analysis
  52. GRB 100902A: Swift/UVOT Upper Limits
  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. GRB100901A: Errata of MITSuME Okayama about reference catalog
  59. GRB 100902A: MASTER Prompt Optical Observations
  60. GRB 100901A: ISON-NM optical observations
  61. GRB 100902A: Faulkes Telescope South observations
  62. GRB 100902A: MASTER Optical Early Limit
  63. GRB 100901A: ROTSE-III Detection
  64. GRB 100901A: MASTER optical flare at 420s discovery
  65. GRB 100901A: Vega telescope optical afterglow observation
  66. Swift/UVOT Observations of GRB100901A
  67. GRB 100901A : HCT optical observations
  68. GRB 100901A: SARA-N observations
  69. GRB 100901A: THO optical observations
  70. GRB100901A: MITSuME Okayama Optical Observation
  71. GRB 100901A: Swift-XRT Team refined analysis
  72. GRB 100901A - NOT optical observation
  73. GRB 100901A: Swift-BAT refined analysis
  74. GRB 100901A: optical observation at Mt.Terskol
  75. GRB 100901A: optical observation at Mt.Terskol
  76. GRB 100901A: MASTER power low decay
  77. GRB 100901A: Gemini-N Redshift
  78. GRB 100901A: MASTER: the OT brightenning
  79. GRB 100901A: confirmation of the afterglow
  80. GRB 100901A: MASTER Optical Early Limits
  81. GRB 100901A: Faulkes Telescope North afterglow candidate
  82. Konus-Wind observation of GRB 100826A
  83. IPN triangulation of GRB 100826A
  84. GRB 100823A: optical upper limit
  85. GRB 100814A: Maidanak optical observations
  86. GRB 100823A: optical observations
  87. GRB 100823A: MAXI/GSC detection
  88. GRB 100725B: Mondy optical upper limit
  89. GRB 100725B: Maidanak optical upper limit
  90. GRB 100823A: Swift/UVOT Evidence for Fading Afterglow Emission
  91. GRB100807A: R band observations
  92. GRB100823A : MOA optical observation
  93. GRB 100823A: Candidate IR afterglow
  94. GRB 100823A: Swift XRT refined analysis
  95. GRB 100823A: VLT/X-Shooter spectroscopy
  96. GRB 100823A - second epoch WHT observations
  97. GRB 100823A: TNG NIR observations
  98. GRB 100823A: Swift/UVOT Upper Limits
  99. GRB 100823A: WHT observations
  100. GRB 100823A: Swift-BAT refined analysis

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