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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.

"200205A/SWIFT J0840.7-3516" does not adhere to advanced search syntax. Please refer to the documentation and try again.
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').
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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

19596 results found.

  1. GRB 100902A: Swift-BAT refined analysis
  2. GRB 100901A: optical observation at Mt.Terskol
  3. GRB 100901A: multicolor photometry at Mt.Terskol
  4. IPN Triangulation of the very bright GRB 100829A
  5. GRB 100901A: Lightbuckets Optical Observations
  6. GRB 100902A: 1.5m OSN I-band Upper Limits
  7. Tentative redshift of GRB100902A from Swift-XRT data
  8. GRB 100902A: Swift XRT refined analysis
  9. GRB 100902A: Swift/UVOT Upper Limits
  10. GRB 100902A: optical observation at Mt.Terskol
  11. GRB 100901A: optical observation at Mt.Terskol
  12. GRB 100902A: Enhanced Swift-XRT position
  13. GRB 100901A: TLS Observations: Break?
  14. GRB 100902A: MASTER Prompt Optical Observations
  15. GRB 100901A: ISON-NM optical observations
  16. GRB 100902A: MASTER Optical Early Limit
  17. GRB 100902A: Swift detection of a burst
  18. GRB 100901A: 1.5m OSN BVRI-band observations.
  19. GRB 100901A: ROTSE-III Detection
  20. Swift/UVOT Observations of GRB100901A
  21. GRB 100901A: Swift-XRT Team refined analysis
  22. GRB 100901A: Swift-BAT refined analysis
  23. GRB 100901A: optical observation at Mt.Terskol
  24. GRB 100901A: Enhanced Swift-XRT position
  25. GRB 100901A: optical observation at Mt.Terskol
  26. GRB 100901A: MASTER power low decay
  27. GRB 100901A: MASTER: the OT brightenning
  28. GRB 100901A: confirmation of the afterglow
  29. GRB 100901A: MASTER Optical Early Limits
  30. GRB 100901A: Faulkes Telescope North afterglow candidate
  31. GRB 100901A: Swift detection of a burst with an optical afterglow
  32. GRB 100823A: optical upper limit
  33. GRB 100814A: Maidanak optical observations
  34. GRB 100823A: optical observations
  35. GRB 100823A: MAXI/GSC detection
  36. GRB 100725B: Mondy optical upper limit
  37. GRB 100725B: Maidanak optical upper limit
  38. GRB 100823A: Swift/UVOT Evidence for Fading Afterglow Emission
  39. GRB100807A: R band observations
  40. GRB100823A : MOA optical observation
  41. GRB 100823A: Swift XRT refined analysis
  42. GRB 100823: 1.5m OSN I-band observations
  43. GRB 100823A: Swift/UVOT Upper Limits
  44. GRB 100823A: Swift-BAT refined analysis
  45. GRB 100823A: Enhanced Swift-XRT position
  46. GRB 100823A: Swift detection of a burst
  47. GRB 100814A: Suzaku WAM observation of the prompt emission
  48. GRB 100814A: ISON-NM optical observations
  49. EVLA radio afterglow detection of GRB 100814A
  50. GRB 100814A: optical observations
  51. Konus-Wind observation of GRB 100816A
  52. GRB 100816A: Fermi GBM observation
  53. Konus-Wind observation of GRB 100814A
  54. GRB 100816A: Gemini-N spectroscopy
  55. GRB 100816A: Swift UVOT Observations
  56. GRB100816A Swift-XRT refined analysis
  57. GRB 100816A: Swift-BAT spectral lag results
  58. GRB 100816A: 1.23m CAHA optical observations
  59. GRB 100816A, Swift-BAT refined analysis
  60. GRB 100816A: Enhanced Swift-XRT position
  61. GRB100814A - interesting UVOT lightcurve.
  62. GRB 100816A: TAROT Calern observatory optical detection
  63. GRB100816A: TNG optical afterglow confirmation.
  64. GRB 100816A: ROTSE-III Optical Limits
  65. GRB 100816A: Swift detection of a possibly short burst with optical afterglow
  66. Swift-BAT trigger 431756 is not a burst
  67. Swift/UVOT observations of GRB100814A - title correction to GCN 11097
  68. GRB 100814A: Fermi GBM observation
  69. Swift/UVOT Observations of GRB100814A - a clearer table.
  70. GRB 100814A: Swift-XRT refined analysis
  71. Swift/UVOT observations of GRB100814A
  72. GRB 100814A, Swift-BAT refined analysis
  73. GRB 100814A: Enhanced Swift-XRT position
  74. GRB 100814A: GROND Detection of the Optical/NIR Afterglow
  75. GRB 100814A: IAC80 R-band observations
  76. GRB 100814A: Swift UVOT observations of the optical afterglow
  77. GRB 100814A: Swift detection of a burst with an optical afterglow
  78. GRB 100814A: ROTSE-III Detection of Optical Counterpart
  79. Swift-BAT trigger 431582 likely is IGR J17464-2811
  80. GRB 100805A: optical observation in CrAO (correction to the GCN 11077 and second epoch)
  81. GRB 100805A: Swift/UVOT Observations of a Possible Late-Time Brightening
  82. GRB 100807A: P200 Infrared Observations
  83. GRB100807A: optical observation in CrAO
  84. GRB 100805A: optical observation in CrAO
  85. GRB 100807A: Swift XRT refined analysis
  86. GRB 100807A: P60 Optical Afterglow Discovery
  87. GRB 100807A: Swift/UVOT Upper Limits
  88. GRB 100807A: Enhanced Swift-XRT position
  89. GRB 100807A: Swift-BAT refined analysis
  90. GRB 100807A: ROTSE-III Optical Limits
  91. GRB 100807A: Swift detection of a burst
  92. GRB 100805A: Early RAPTOR Observations
  93. GRB 100805A: Swift/UVOT Observations of the Optical Afterglow
  94. Swift-BAT trigger 430975 is not a burst
  95. GRB 100805A: Swift-BAT refined analysis
  96. GRB 100805A: Swift-XRT Refined Analysis
  97. Trigger 430975: Swift detection of a possible burst
  98. GRB 100805A: I-band detection from 1.23m CAHA telescope.
  99. GRB 100805A: Enhanced Swift-XRT position
  100. GRB 100805A: Liverpool Telescope afterglow observations

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