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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"

45765 results found.

  1. Tentative redshift of GRB100902A from Swift-XRT data
  2. GRB 100902A: Swift XRT refined analysis
  3. GRB 100902A: Swift/UVOT Upper Limits
  4. GRB 100902A: optical observation at Mt.Terskol
  5. GRB 100901A: optical observation at Mt.Terskol
  6. GRB 100901A: Kanata Telescope observation of the optical afterglow
  7. GRB100901A: MITSuME Okayama Optical Observation at 1 day after the burst
  8. GRB 100902A: Enhanced Swift-XRT position
  9. GRB 100901A: TLS Observations: Break?
  10. GRB100901A: Errata of MITSuME Okayama about reference catalog
  11. GRB 100902A: MASTER Prompt Optical Observations
  12. GRB 100901A: ISON-NM optical observations
  13. GRB 100902A: Faulkes Telescope South observations
  14. GRB 100902A: MASTER Optical Early Limit
  15. GRB 100902A: Swift detection of a burst
  16. GRB 100901A: 1.5m OSN BVRI-band observations.
  17. GRB 100901A: ROTSE-III Detection
  18. GRB 100901A: MASTER optical flare at 420s discovery
  19. GRB 100901A: Vega telescope optical afterglow observation
  20. Swift/UVOT Observations of GRB100901A
  21. GRB 100901A : HCT optical observations
  22. GRB 100901A: SARA-N observations
  23. GRB 100901A: THO optical observations
  24. GRB100901A: MITSuME Okayama Optical Observation
  25. GRB 100901A: Swift-XRT Team refined analysis
  26. GRB 100901A - NOT optical observation
  27. GRB 100901A: Swift-BAT refined analysis
  28. GRB 100901A: optical observation at Mt.Terskol
  29. GRB 100901A: Enhanced Swift-XRT position
  30. GRB 100901A: optical observation at Mt.Terskol
  31. GRB 100901A: MASTER power low decay
  32. GRB 100901A: Gemini-N Redshift
  33. GRB 100901A: MASTER: the OT brightenning
  34. GRB 100901A: confirmation of the afterglow
  35. GRB 100901A: MASTER Optical Early Limits
  36. GRB 100901A: Faulkes Telescope North afterglow candidate
  37. GRB 100901A: Swift detection of a burst with an optical afterglow
  38. Konus-Wind observation of GRB 100826A
  39. GRB 100829.9: MASTER Optical Limits
  40. IPN triangulation of GRB 100826A
  41. GRB100826A: Fermi-LAT Observations
  42. GRB 100823A: optical upper limit
  43. GRB 100814A: Maidanak optical observations
  44. GRB 100823A: optical observations
  45. GRB 100823A: MAXI/GSC detection
  46. GRB 100725B: Mondy optical upper limit
  47. GRB 100725B: Maidanak optical upper limit
  48. GRB 100823A: Swift/UVOT Evidence for Fading Afterglow Emission
  49. GRB100807A: R band observations
  50. GRB100823A : MOA optical observation
  51. GRB 100823A: Candidate IR afterglow
  52. GRB 100823A: Swift XRT refined analysis
  53. GRB 100823A: VLT/X-Shooter spectroscopy
  54. GRB 100823A - second epoch WHT observations
  55. GRB 100823A: TNG NIR observations
  56. GRB 100823: 1.5m OSN I-band observations
  57. GRB 100823A: Swift/UVOT Upper Limits
  58. GRB 100823A: WHT observations
  59. GRB 100823A: Swift-BAT refined analysis
  60. GRB 100823A: Enhanced Swift-XRT position
  61. GRB 100823A: Swift detection of a burst
  62. GRB 100814A: Suzaku WAM observation of the prompt emission
  63. GRB 100814A: ISON-NM optical observations
  64. IBAS Alert n. 6057 is not due to a GRB
  65. EVLA radio afterglow detection of GRB 100814A
  66. GRB 100814B: Fermi GBM detection
  67. GRB 100814A: optical observations
  68. GRB 100816A: Fermi GBM observation (correction to GCN 11124)
  69. Konus-Wind observation of GRB 100816A
  70. GRB100816A: MITSuME optical upper limits
  71. GRB 100816A: 10.4-m GTC redshift confirmation
  72. GRB 100816A: Fermi GBM observation
  73. GRB 100816A: VLT and Gemini-N revised redshift
  74. GRB 100814A : Liverpool Telescope Observations
  75. GRB 100814A: NOT optical observations
  76. GRB 100816A: NOT optical observations
  77. Konus-Wind observation of GRB 100814A
  78. GRB 100814A : Lulin optical observation
  79. GRB 100816A : Lulin r'-band observation
  80. GRB 100816A: Gemini-N spectroscopy
  81. GRB 100816A: Swift UVOT Observations
  82. GRB100816A Swift-XRT refined analysis
  83. GRB 100816A: 1.23m CAHA optical observations
  84. GRB 100816A, Swift-BAT refined analysis
  85. GRB 100816A: Enhanced Swift-XRT position
  86. GRB 100816A: Gemini-N imaging
  87. GRB 100816A: CQUEAN riz-band Detection, Host Galaxy?
  88. GRB100814A - interesting UVOT lightcurve.
  89. GRB 100816A: TAROT Calern observatory optical detection
  90. GRB 100816A: MASTER Optical Limits
  91. GRB100816A: TNG optical afterglow confirmation.
  92. GRB 100816A: ROTSE-III Optical Limits
  93. GRB 100816A: Swift detection of a possibly short burst with optical afterglow
  94. Swift-BAT trigger 431756 is not a burst
  95. Swift/UVOT observations of GRB100814A - title correction to GCN 11097
  96. GRB 100814A: Fermi GBM observation
  97. GRB 100814A: Submm observations from APEX
  98. Swift/UVOT Observations of GRB100814A - a clearer table.
  99. GRB 100814A: Swift-XRT refined analysis
  100. Swift/UVOT observations of GRB100814A

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