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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"

45758 results found.

  1. GRB 100917A: Swift detection of a burst
  2. GRB100915A: MITSuME Ishigakijima Optical upper limits
  3. GRB 100915B: GRT Optical Observation
  4. GRB 100915A: GRT Optical Observation
  5. GRB 100915B: Fermi GBM observation
  6. GRB 100915A: Correction to Swift-BAT refined analysis
  7. GRB 100915A: Swift/UVOT Upper Limits
  8. GRB 100915A: Swift-BAT refined analysis
  9. GRB 100915A: Swift-XRT refined analysis
  10. GRB 100915A: Enhanced Swift-XRT position
  11. GRB 100915B: a long GRB detected by INTEGRAL
  12. GRB 100915A: Swift detection of a likely burst
  13. GRB 100910A: Fermi GBM detection
  14. Swift-BAT trigger 433953 is not a burst
  15. Swift BAT Trigger 433953 probably not a GRB
  16. GRB100909A: MITSuME Ishigakijima Optical upper limits
  17. GRB 100909A: Swift/UVOT observations
  18. GRB 100901A: errata of GRB name in GCN 11270
  19. GRB 100901A: optical observations in Mondy and R-light curve
  20. GRB100909A: NOT optical afterglow confirmation
  21. GRB 100909A: Swift-XRT refined analysis
  22. GRB 100906A: optical observations at Mt.Terskol
  23. GRB 100901A: optical observation in Maidanak, break confirmation
  24. GRB 100909A: Faulkes Telescope North afterglow candidate
  25. GRB 100909A: ROTSE-III Optical Limits
  26. GRB 100909A: Planned XMM-Newton observation
  27. GRB 100902A : Confirmation of afterglow and re-brightening with CFHT r’-band imaging
  28. GRB 100909A: Swift target of opportunity observation
  29. GRB 100909A: a long GRB detected by INTEGRAL
  30. GRB100906A: detection at 15GHz
  31. GRB100901A: IAO optical upper limits at 4 days after the burst
  32. EVLA detection of radio afterglow of GRB100901A
  33. GRB 100901A: Confirmation of WSRT Radio Detection
  34. GRB 100901A: CrAO optical observations
  35. GRB 100906A: RTT150 optical observations
  36. GRB 100906A: GRAS-007 optical observations
  37. GRB100906A: R band observations
  38. Konus-Wind observation of GRB 100906A
  39. GRB100906A: non-detection at 15GHz
  40. GRB100906A: Optical observations at IAO
  41. GRB 100906A: Fermi GBM observation
  42. GRB 100906A: TLS Monitoring
  43. GRB 100901A: TLS Detection at 5.5 days
  44. GRB 100906A: Observations at the Virtual Telescope
  45. GRB 100906A: Swift-XRT refined analysis
  46. GRB 100906A: Enhanced Swift-XRT position
  47. GRB 100906A: Swift/UVOT Observations
  48. GRB100906A: Errata of MITSuME Okayama about observation time
  49. GRB100906A: MITSuME Okayama Optical Observation
  50. GRB 100906A: Ondrejov 65cm observations
  51. GRB 100906A: TLS Multicolor Observations
  52. GRB 100905A: Swift/UVOT Upper Limits
  53. GRB 100901A: TLS observations, SDSS calibration, decay slope
  54. GRB 100906A: MASTER preliminary prompt+afterglow lc
  55. GRB 100901A: ISON-NM optical observations
  56. GRB 100906A: Swift-BAT refined analysis
  57. GRB 100906A: UKIRT zYJHK Observation
  58. GRB 100906A: MASTER preliminary polarization prompt light curve
  59. GRB 100906A: Gemini-N/GMOS redshift
  60. GRB 100906A : Faulkes Telescope North optical observations
  61. GRB 100906A: MASTER early OT observations
  62. GRB 100906A: Swift detection of a burst with an optical afterglow
  63. GRB 100829A: MASTER optical observations
  64. GRB100905A: Optical upper limits at IAO
  65. GRB100905A: MITSuME Okayama optical upper limits
  66. GRB 100905A: Swift-XRT refined analysis.
  67. GRB 100905A: UKIRT zJHK Observation
  68. GRB 100901A: Possible WSRT Radio Detection
  69. GRB100905A: 1.5m OSN upper limit
  70. GRB 100905A: Enhanced Swift-XRT position
  71. GRB 100905A: Swift-BAT refined analysis
  72. GRB100904A: BOOTES-3 Upper Limit
  73. GRB 100905A: MASTER Prompt Optical Observations
  74. GRB 100905A: Faulkes Telescope North observations
  75. GRB 100905A: Swift detection of a burst
  76. Optical observations of GRB 100901A
  77. GRB10901A: Murikabushi telescope observation at 3 days after the burst
  78. GRB 100901A: Submm observations from SMA
  79. GRB 100902A: UKIRT JK Observation
  80. GRB 100902A: GROND observations; afterglow candidate
  81. GRB 100901A: UKIRT zYJHK Observation
  82. GRB 100904A: Swift-BAT refined analysis
  83. GRB100902A: Optical upper limits at IAO
  84. GRB10901A: Optical observations at IAO
  85. Konus-Wind observation of GRB 100829A
  86. GRB 100904A: Swift detection of a burst
  87. GRB 100902A: Swift-BAT refined analysis
  88. GRB 100901A: optical observation at Mt.Terskol
  89. GRB 100901A: multicolor photometry at Mt.Terskol
  90. IPN Triangulation of the very bright GRB 100829A
  91. GRB 100901A: Lightbuckets Optical Observations
  92. GRB 100901A: HCT optical observations
  93. GRB 100902A: 1.5m OSN I-band Upper Limits
  94. Tentative redshift of GRB100902A from Swift-XRT data
  95. GRB 100902A: Swift XRT refined analysis
  96. GRB 100902A: Swift/UVOT Upper Limits
  97. GRB 100902A: optical observation at Mt.Terskol
  98. GRB 100901A: optical observation at Mt.Terskol
  99. GRB 100901A: Kanata Telescope observation of the optical afterglow
  100. GRB100901A: MITSuME Okayama Optical Observation at 1 day after the burst

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