Skip to main content
Updates to LVK & CHIME Notices, Schema v7.2.3! See news and announcements

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').
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"

19596 results found.

  1. GRB 080514B: possible AGILE detection at E>50 MeV
  2. Swift detection of a possible galactic transient
  3. GRB 080507: Suzaku WAM observation of the prompt emission
  4. GRB 080507: Swift XRT analysis confirms the X-ray afterglow
  5. GRB 080507: Keck photometry
  6. GRB 080503: Chandra Observation of X-ray Rebrightening or Flattening
  7. GRB080507: Swift/UVOT followup observations
  8. GRB 080507: Swift-XRT position of a possible afterglow
  9. GRB 080506: VLA radio upper limit
  10. GRB 080506: TLS 2nd Epoch - possible light curve break
  11. GRB 080506: Swift XRT refined analysis
  12. GRB080506: Swift/UVOT observations
  13. GRB 080506, Swift-BAT refined analysis
  14. GRB080503, RIMOTS optical upper limit
  15. GRB 080506: TLS afterglow detection in VRIZ
  16. GRB 080506: Enhanced Swift-XRT position
  17. GRB 080506: Swift detection of a burst with optical afterglow
  18. GRB 080503, Swift-BAT lag and time-resolved spectral analysis
  19. GRB080503: Swift/UVOT Upper Limits
  20. GRB080503 XRT refined analysis
  21. GRB 080503, Swift-BAT refined analysis
  22. GRB 080430
  23. GRB 080503: Enhanced Swift-XRT position
  24. GRB 080503: Swift detection of a short burst
  25. GRB 080411: Continued Swift Monitoring
  26. GRB 080430: Optical observations
  27. GRB080430: Swift/UVOT observations
  28. GRB 080430 optical observations
  29. GRB 080430, Swift-BAT refined analysis
  30. GRB 080430: Swift-XRT refined analysis
  31. GRB 080430: Enhanced Swift-XRT position
  32. GRB 080430 - SDSS Pre-Burst Observations
  33. GRB 080430: Swift detection of a burst with optical afterglow
  34. GRB 080430: TAROT Calern observatory optical observations
  35. GRB 080426: Swift-XRT refined analysis
  36. GRB080426: Swift/UVOT upper limits
  37. GRB 080426: Enhanced Swift-XRT position
  38. GRB 080426, Swift-BAT refined analysis
  39. GRB 080426: Swift detection of a possibly short burst
  40. Possible GRB 080315: XRT non-detection of afterglow
  41. Swift-BAT trigger 309665 is not a GRB
  42. GRB 080420A: ROTSE-III Optical Limits on a possible short burst
  43. GRB 080420?: Swift detection of a possible short burst
  44. GRB 080413A: Suzaku/WAM and Swift/BAT joint spectral analysis
  45. Swift XRT and UVOT observations of GRB080414
  46. GRB 080319B: Jet Break, Energetics, Supernova
  47. GRB 080413A: Suzaku WAM observation of the prompt emission
  48. GRB 080413B: Suzaku WAM observation of the prompt emission
  49. GRB 080413B: Ep,i-Eiso correlation
  50. GRB080413B
  51. Swift-BAT spectral lag analysis of GRB 080413B
  52. GRB 080413B: Swift XRT refined analysis
  53. GRB080413A: Swift/UVOT observations
  54. GRB 080413B, Swift-BAT refined analysis
  55. GRB 080413A: Swift-XRT refined analysis
  56. GRB 080413A, Swift-BAT refined analysis
  57. GRB 080413B: GROND detection of afterglow in all bands
  58. GRB 080413B: Swift detection of a possibly short burst with optical counterpart
  59. GRB 080413: Enhanced Swift-XRT position
  60. GRB 080413: TAROT Calern observatory optical observations
  61. GRB 080413: Swift detection of a burst with an optical afterglow
  62. GRB 080413: ROTSE-III Detection of Optical Counterpart
  63. GRB 080411: Swift/UVOT refined analysis
  64. GRB 080411, Swift-BAT refined analysis
  65. GRB 080411: Swift-XRT Refined Analysis
  66. Konus-Wind observation of GRB 080411
  67. GRB 080411: Enhanced Swift-XRT position
  68. GRB 080411: Swift detection of a bright burst
  69. GRB 080330: Swift-XRT refined position retraction
  70. GRB 080409: Swift-BAT refined analysis
  71. Swift/UVOT observations of GRB080409
  72. GRB 080409: Swift XRT refined analysis
  73. UVOT/Swift Observations of GRB080408
  74. GRB 080408: Swift-XRT position of a possible afterglow
  75. GRB 080409: Enhanced Swift-XRT position
  76. GRB 080409: Swift detection of a burst
  77. GRB 080319A: Early RAPTOR optical limits
  78. GRB 080330: RAPTOR detection of prompt optical flash
  79. GRB 080319B: Potential Jet Break Observed by Swift-XRT and UVOT
  80. GRB 080405: Swift-BAT refined analysis
  81. GRB 080405: Swift-XRT position
  82. GRB 080405: Mars Oddysey and Swift-BAT detection, possible host galaxy
  83. GRB 080325: optical upper limit
  84. GRB080330: Improved Swift XRT Position
  85. GRB080328, RIMOTS optical upper limit
  86. GRB080330: Swift XRT refined analysis
  87. GRB 080330 Swift-UVOT refined analysis
  88. GRB 080328: Suzaku WAM observation of the prompt emission
  89. GRB 080330, Swift-BAT refined analysis
  90. Konus-Wind observation of GRB 080328
  91. GRB 080330: GROND Observations
  92. GRB 080330: TAROT Calern observatory optical observations
  93. GRB 080330: error in reported XRT position
  94. GRB080330 - SDSS Pre-Burst Observations
  95. GRB 080330: Liverpool Telescope Optical observations
  96. GRB 080330A: ROTSE-III Detection of Optical Counterpart
  97. GRB 080330: Swift detection of a burst with an optical counterpart
  98. GRB 080330: TAROT Calern observatory optical detection
  99. GRB 080328: BTA optical imaging and spectroscopy
  100. GRB 080328, Swift-BAT refined analysis

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
Questions or comments?
Contact GCN directly.
Have you found a bug in GCN?
Open an issue.
Want to contribute code to GCN?
Get involved on GitHub.

gcn.nasa.gov

A service of the Astrophysics Science Division at NASA Goddard Space Flight Center

Looking for U.S. government information and services? Visit USA.gov