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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"

36339 results found.

  1. GRB 100915A: Enhanced Swift-XRT position
  2. GRB 100915B: a long GRB detected by INTEGRAL
  3. GRB 100915A: Swift detection of a likely burst
  4. GRB 100910A: Fermi GBM detection
  5. Swift-BAT trigger 433953 is not a burst
  6. Swift BAT Trigger 433953 probably not a GRB
  7. GRB100909A: MITSuME Ishigakijima Optical upper limits
  8. GRB 100909A: Swift/UVOT observations
  9. GRB 100901A: errata of GRB name in GCN 11270
  10. GRB 100901A: optical observations in Mondy and R-light curve
  11. GRB 100909A: Swift-XRT refined analysis
  12. GRB 100906A: optical observations at Mt.Terskol
  13. GRB 100901A: optical observation in Maidanak, break confirmation
  14. GRB 100909A: Faulkes Telescope North afterglow candidate
  15. GRB 100909A: ROTSE-III Optical Limits
  16. GRB 100909A: Planned XMM-Newton observation
  17. GRB 100902A : Confirmation of afterglow and re-brightening with CFHT r’-band imaging
  18. GRB 100909A: Swift target of opportunity observation
  19. GRB 100909A: a long GRB detected by INTEGRAL
  20. GRB100906A: detection at 15GHz
  21. GRB100901A: IAO optical upper limits at 4 days after the burst
  22. EVLA detection of radio afterglow of GRB100901A
  23. GRB 100901A: Confirmation of WSRT Radio Detection
  24. GRB 100901A: CrAO optical observations
  25. GRB 100906A: RTT150 optical observations
  26. GRB 100906A: GRAS-007 optical observations
  27. GRB100906A: R band observations
  28. Konus-Wind observation of GRB 100906A
  29. GRB100906A: non-detection at 15GHz
  30. GRB100906A: Optical observations at IAO
  31. GRB 100906A: Fermi GBM observation
  32. GRB 100906A: TLS Monitoring
  33. GRB 100901A: TLS Detection at 5.5 days
  34. GRB 100906A: Observations at the Virtual Telescope
  35. GRB 100906A: Swift-XRT refined analysis
  36. GRB 100906A: Enhanced Swift-XRT position
  37. GRB 100906A: Swift/UVOT Observations
  38. GRB100906A: MITSuME Okayama Optical Observation
  39. GRB 100906A: Ondrejov 65cm observations
  40. GRB 100906A: TLS Multicolor Observations
  41. GRB 100905A: Swift/UVOT Upper Limits
  42. GRB 100901A: TLS observations, SDSS calibration, decay slope
  43. GRB 100906A: MASTER preliminary prompt+afterglow lc
  44. GRB 100901A: ISON-NM optical observations
  45. GRB 100906A: Swift-BAT refined analysis
  46. GRB 100906A: UKIRT zYJHK Observation
  47. GRB 100906A: MASTER preliminary polarization prompt light curve
  48. GRB 100906A: Gemini-N/GMOS redshift
  49. GRB 100906A : Faulkes Telescope North optical observations
  50. GRB 100906A: MASTER early OT observations
  51. GRB 100906A: Swift detection of a burst with an optical afterglow
  52. GRB 100829A: MASTER optical observations
  53. GRB100905A: Optical upper limits at IAO
  54. GRB100905A: MITSuME Okayama optical upper limits
  55. GRB 100905A: Swift-XRT refined analysis.
  56. GRB 100905A: UKIRT zJHK Observation
  57. GRB 100901A: Possible WSRT Radio Detection
  58. GRB 100905A: Enhanced Swift-XRT position
  59. GRB 100905A: Swift-BAT refined analysis
  60. GRB100904A: BOOTES-3 Upper Limit
  61. GRB 100905A: MASTER Prompt Optical Observations
  62. GRB 100905A: Faulkes Telescope North observations
  63. GRB 100905A: Swift detection of a burst
  64. Optical observations of GRB 100901A
  65. GRB10901A: Murikabushi telescope observation at 3 days after the burst
  66. GRB 100901A: Submm observations from SMA
  67. GRB 100902A: UKIRT JK Observation
  68. GRB 100902A: GROND observations; afterglow candidate
  69. GRB 100901A: UKIRT zYJHK Observation
  70. GRB 100904A: Swift-BAT refined analysis
  71. GRB100902A: Optical upper limits at IAO
  72. GRB10901A: Optical observations at IAO
  73. Konus-Wind observation of GRB 100829A
  74. GRB 100904A: Swift detection of a burst
  75. GRB 100902A: Swift-BAT refined analysis
  76. GRB 100901A: optical observation at Mt.Terskol
  77. GRB 100901A: multicolor photometry at Mt.Terskol
  78. IPN Triangulation of the very bright GRB 100829A
  79. GRB 100901A: Lightbuckets Optical Observations
  80. GRB 100901A: HCT optical observations
  81. GRB 100902A: 1.5m OSN I-band Upper Limits
  82. Tentative redshift of GRB100902A from Swift-XRT data
  83. GRB 100902A: Swift XRT refined analysis
  84. GRB 100902A: Swift/UVOT Upper Limits
  85. GRB 100902A: optical observation at Mt.Terskol
  86. GRB 100901A: optical observation at Mt.Terskol
  87. GRB 100901A: Kanata Telescope observation of the optical afterglow
  88. GRB100901A: MITSuME Okayama Optical Observation at 1 day after the burst
  89. GRB 100902A: Enhanced Swift-XRT position
  90. GRB 100901A: TLS Observations: Break?
  91. GRB 100902A: MASTER Prompt Optical Observations
  92. GRB 100901A: ISON-NM optical observations
  93. GRB 100902A: Faulkes Telescope South observations
  94. GRB 100902A: MASTER Optical Early Limit
  95. GRB 100902A: Swift detection of a burst
  96. GRB 100901A: 1.5m OSN BVRI-band observations.
  97. GRB 100901A: ROTSE-III Detection
  98. GRB 100901A: MASTER optical flare at 420s discovery
  99. GRB 100901A: Vega telescope optical afterglow observation
  100. Swift/UVOT Observations of GRB100901A

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