Skip to main content
New! BOOM Notices and Schema v7.0.0. 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.

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"

19538 results found.

  1. GRB 080602: Swift-XRT refined analysis
  2. Konus-Wind observation of GRB 080602
  3. GRB 080602: Enhanced Swift-XRT position
  4. GRB 080602: Swift detection of a burst
  5. Swift analysis of BAT Slew Survey event (Trigger=009)
  6. Konus-Wind observation of reactivation of SGR 1627-41
  7. Reactivation of SGR 1627-41
  8. GRB 080524: Swift XRT and UVOT analysis
  9. GRB 080524: Swift-BAT detection of a burst in ground analysis
  10. GRB 080523: Swift-XRT refined analysis
  11. GRB 080523, Swift-BAT refined analysis
  12. Swift/UVOT observations of GRB 080523
  13. GRB 080523: Enhanced Swift-XRT position
  14. GRB 080523: Swift detection of a burst
  15. GRB 80516: Swift/UVOT Observations
  16. GRB 080515: Swift-XRT position and analysis
  17. GRB 080520, Swift-BAT refined analysis
  18. GRB 080514B: pseudo-z= 1.8 from prompt emission spectrum
  19. GRB 080514B: UVOT Observations
  20. GRB080520: Swift/UVOT observations
  21. GRB 080520, GROND observations
  22. GRB 080520: Enhanced Swift-XRT position
  23. GRB 080520: Swift XRT Refined Analysis
  24. GRB 080520: Swift detection of a burst with optical afterglow
  25. GRB 080514B: second epoch Swift XRT data confirms the X-ray afterglow
  26. GRB 080517, Swift-BAT refined analysis
  27. GRB 080517: Swift-XRT refined analysis
  28. GRB 080517: Enhanced Swift-XRT position
  29. GRB 080517: Swift detection of a burst
  30. GRB 080516, SMARTS optical/IR observations
  31. GRB 080516: Swift-XRT Team refined analysis
  32. GRB 080516, Swift-BAT refined analysis
  33. GRB 080516: Enhanced Swift-XRT position
  34. GRB 080516: Swift detection of a burst
  35. Errartum: VLA upper limit on GRB 080507
  36. VLA upper limit on GRB 080705
  37. IPN triangulation of bright GRB 080513
  38. Swift-BAT refined analysis for Trigger 311603: Galactic source
  39. GRB 080515, Swift-BAT refined analysis
  40. GRB 080514B: Swift-XRT analysis
  41. GRB 080515: Swift detection of a burst
  42. GRB 080514B: possible AGILE detection at E>50 MeV
  43. Swift detection of a possible galactic transient
  44. GRB 080507: Suzaku WAM observation of the prompt emission
  45. GRB 080507: Swift XRT analysis confirms the X-ray afterglow
  46. GRB 080507: Keck photometry
  47. GRB 080503: Chandra Observation of X-ray Rebrightening or Flattening
  48. GRB080507: Swift/UVOT followup observations
  49. GRB 080507: Swift-XRT position of a possible afterglow
  50. GRB 080506: VLA radio upper limit
  51. GRB 080506: TLS 2nd Epoch - possible light curve break
  52. GRB 080506: Swift XRT refined analysis
  53. GRB080506: Swift/UVOT observations
  54. GRB 080506, Swift-BAT refined analysis
  55. GRB080503, RIMOTS optical upper limit
  56. GRB 080506: TLS afterglow detection in VRIZ
  57. GRB 080506: Enhanced Swift-XRT position
  58. GRB 080506: Swift detection of a burst with optical afterglow
  59. GRB 080503, Swift-BAT lag and time-resolved spectral analysis
  60. GRB080503: Swift/UVOT Upper Limits
  61. GRB080503 XRT refined analysis
  62. GRB 080503, Swift-BAT refined analysis
  63. GRB 080430
  64. GRB 080503: Enhanced Swift-XRT position
  65. GRB 080503: Swift detection of a short burst
  66. GRB 080411: Continued Swift Monitoring
  67. GRB 080430: Optical observations
  68. GRB080430: Swift/UVOT observations
  69. GRB 080430 optical observations
  70. GRB 080430, Swift-BAT refined analysis
  71. GRB 080430: Swift-XRT refined analysis
  72. GRB 080430: Enhanced Swift-XRT position
  73. GRB 080430 - SDSS Pre-Burst Observations
  74. GRB 080430: Swift detection of a burst with optical afterglow
  75. GRB 080430: TAROT Calern observatory optical observations
  76. GRB 080426: Swift-XRT refined analysis
  77. GRB080426: Swift/UVOT upper limits
  78. GRB 080426: Enhanced Swift-XRT position
  79. GRB 080426, Swift-BAT refined analysis
  80. GRB 080426: Swift detection of a possibly short burst
  81. Possible GRB 080315: XRT non-detection of afterglow
  82. Swift-BAT trigger 309665 is not a GRB
  83. GRB 080420A: ROTSE-III Optical Limits on a possible short burst
  84. GRB 080420?: Swift detection of a possible short burst
  85. GRB 080413A: Suzaku/WAM and Swift/BAT joint spectral analysis
  86. Swift XRT and UVOT observations of GRB080414
  87. GRB 080319B: Jet Break, Energetics, Supernova
  88. GRB 080413A: Suzaku WAM observation of the prompt emission
  89. GRB 080413B: Suzaku WAM observation of the prompt emission
  90. GRB 080413B: Ep,i-Eiso correlation
  91. GRB080413B
  92. Swift-BAT spectral lag analysis of GRB 080413B
  93. GRB 080413B: Swift XRT refined analysis
  94. GRB080413A: Swift/UVOT observations
  95. GRB 080413B, Swift-BAT refined analysis
  96. GRB 080413A: Swift-XRT refined analysis
  97. GRB 080413A, Swift-BAT refined analysis
  98. GRB 080413B: GROND detection of afterglow in all bands
  99. GRB 080413B: Swift detection of a possibly short burst with optical counterpart
  100. GRB 080413: Enhanced Swift-XRT position

Advanced

Download all Circulars as a .tar.gz archive:
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