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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"

27604 results found.

  1. GRB 101011A: Zadko observatory - Gingin optical observations
  2. GRB 101011A: XRT Refined Analysis
  3. GRB 101011A: Swift/UVOT Observations of a Possible Optical Afterglow
  4. GRB 101011A: Swift-BAT refined analysis
  5. GRB 101011A: Swift detection of a burst
  6. GRB 101008A: Fermi GBM observation
  7. GRB 101008A: MASTER prompt optical observations
  8. GRB 101008A: Swift-BAT refined analysis
  9. GRB101008A, GROND detection of a fading afterglow
  10. GRB 101008A: Swift-XRT refined analysis
  11. GRB 101008A: SAO RAS optical observations
  12. GRB 101008: Swift/UVOT Upper Limits
  13. GRB 101008A: 1.23m CAHA optical observations
  14. GRB 101008A: Swift/XRT Detection of an Afterglow with no UVOT Counterpart
  15. GRB 101008A: Swift detection of a burst
  16. Refined analysis shows Swift Trigger 435520 is not a GRB
  17. Swift Trigger 435520 is probably not a GRB
  18. GRB 100924A: Suzaku WAM observation of the prompt emission
  19. GRB 100928A, Swift-BAT refined analysis
  20. GRB 100924A: Fermi GBM observation
  21. GRB 100928A: Swift detection of a burst
  22. GRB 100925A / MAXI J1659-152: WSRT Radio and Polarization Detection
  23. GRB100925A/MAXI J1659-152 MITSuME Ishigakijima and Okayama Optical Observation
  24. GRB 100925A / MAXI J1659-152: SARA-S Observations
  25. GRB100925A/MAXI J1659-152: Galactic origin from SED analysis
  26. GRB 100925A/MAXI J1659-152 - NOT optical observations
  27. MAXI J1659-152: Swift-BAT refined analysis (triggers 434928 and 434931)
  28. GRB 100925A: Nearby DSS Source - SN-GRB or new Galactic transient?
  29. GRB100925A UVOT afterglow
  30. GRB 100924A: GROND detection of an optical/NIR afterglow
  31. GRB 100925A: Swift detection of a burst
  32. GRB 100924A: Swift-BAT refined analysis
  33. GRB 100924A: Swift detection of a burst
  34. GRB 100917A: TAROT La Silla observatory optical observations
  35. GRB 100915A: TAROT Calern observatory optical observations
  36. GRB100906A: Ashra-1 observation of early optical emission
  37. GRB 100916A: Fermi GBM detection
  38. GRB 100917A: Swift-BAT refined analysis
  39. GRB 100917A: Swift detection of a burst
  40. GRB100915A: MITSuME Ishigakijima Optical upper limits
  41. GRB 100915B: GRT Optical Observation
  42. GRB 100915A: GRT Optical Observation
  43. GRB 100915B: Fermi GBM observation
  44. GRB 100915A: Correction to Swift-BAT refined analysis
  45. GRB 100915A: Swift/UVOT Upper Limits
  46. GRB 100915A: Swift-BAT refined analysis
  47. GRB 100915A: Swift-XRT refined analysis
  48. GRB 100915A: Swift detection of a likely burst
  49. GRB 100910A: Fermi GBM detection
  50. Swift-BAT trigger 433953 is not a burst
  51. Swift BAT Trigger 433953 probably not a GRB
  52. GRB100909A: MITSuME Ishigakijima Optical upper limits
  53. GRB 100909A: Swift/UVOT observations
  54. GRB 100901A: optical observations in Mondy and R-light curve
  55. GRB 100909A: Swift-XRT refined analysis
  56. GRB 100909A: Faulkes Telescope North afterglow candidate
  57. GRB 100909A: ROTSE-III Optical Limits
  58. GRB 100902A : Confirmation of afterglow and re-brightening with CFHT r’-band imaging
  59. GRB 100909A: Swift target of opportunity observation
  60. GRB100906A: detection at 15GHz
  61. GRB100906A: R band observations
  62. Konus-Wind observation of GRB 100906A
  63. GRB100906A: non-detection at 15GHz
  64. GRB 100906A: Fermi GBM observation
  65. GRB 100906A: Swift-XRT refined analysis
  66. GRB 100906A: Swift/UVOT Observations
  67. GRB 100905A: Swift/UVOT Upper Limits
  68. GRB 100901A: TLS observations, SDSS calibration, decay slope
  69. GRB 100906A: MASTER preliminary prompt+afterglow lc
  70. GRB 100906A: Swift-BAT refined analysis
  71. GRB 100906A: UKIRT zYJHK Observation
  72. GRB 100906A: MASTER preliminary polarization prompt light curve
  73. GRB 100906A : Faulkes Telescope North optical observations
  74. GRB 100906A: MASTER early OT observations
  75. GRB 100906A: Swift detection of a burst with an optical afterglow
  76. GRB 100829A: MASTER optical observations
  77. GRB 100905A: Swift-XRT refined analysis.
  78. GRB 100905A: UKIRT zJHK Observation
  79. GRB 100905A: Swift-BAT refined analysis
  80. GRB100904A: BOOTES-3 Upper Limit
  81. GRB 100905A: MASTER Prompt Optical Observations
  82. GRB 100905A: Faulkes Telescope North observations
  83. GRB 100905A: Swift detection of a burst
  84. GRB 100902A: UKIRT JK Observation
  85. GRB 100902A: GROND observations; afterglow candidate
  86. GRB 100901A: UKIRT zYJHK Observation
  87. GRB 100904A: Swift-BAT refined analysis
  88. GRB 100904A: Swift detection of a burst
  89. GRB 100902A: Swift-BAT refined analysis
  90. IPN Triangulation of the very bright GRB 100829A
  91. GRB 100901A: Lightbuckets Optical Observations
  92. Tentative redshift of GRB100902A from Swift-XRT data
  93. GRB 100902A: Swift XRT refined analysis
  94. GRB 100902A: Swift/UVOT Upper Limits
  95. GRB 100901A: TLS Observations: Break?
  96. GRB 100902A: MASTER Prompt Optical Observations
  97. GRB 100902A: Faulkes Telescope South observations
  98. GRB 100902A: MASTER Optical Early Limit
  99. GRB 100902A: Swift detection of a burst
  100. GRB 100901A: ROTSE-III Detection

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