Skip to main content
JSON Notices via Email, Kafka Cron Jobs, Submitter Profile, GCN is Hiring. See news and announcements

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"

21525 results found.

  1. GRB 080516: Swift-XRT Team refined analysis
  2. GRB 080516, Swift-BAT refined analysis
  3. GRB 080516: Enhanced Swift-XRT position
  4. GRB 080516: Swift detection of a burst
  5. Errartum: VLA upper limit on GRB 080507
  6. VLA upper limit on GRB 080705
  7. GRB 080514B : redshift estimation
  8. IPN triangulation of bright GRB 080513
  9. Swift-BAT refined analysis for Trigger 311603: Galactic source
  10. GRB 080515, Swift-BAT refined analysis
  11. GRB 080514B: Swift-XRT analysis
  12. GRB 080515: Swift detection of a burst
  13. GRB 080514B: possible AGILE detection at E>50 MeV
  14. Swift detection of a possible galactic transient
  15. GRB080514: REM NIR & Optical Observations
  16. GRB 080507: Suzaku WAM observation of the prompt emission
  17. GRB 080507: Swift XRT analysis confirms the X-ray afterglow
  18. GRB 080507: Keck photometry
  19. GRB 080503: Chandra Observation of X-ray Rebrightening or Flattening
  20. GRB080507: Swift/UVOT followup observations
  21. GRB 080507: Swift-XRT position of a possible afterglow
  22. GRB 080506: VLA radio upper limit
  23. GRB 080506: TLS 2nd Epoch - possible light curve break
  24. GRB 080506: Swift XRT refined analysis
  25. GRB080506: Swift/UVOT observations
  26. GRB 080506, Swift-BAT refined analysis
  27. GRB080503, RIMOTS optical upper limit
  28. GRB 080506: TLS afterglow detection in VRIZ
  29. GRB 080506: Enhanced Swift-XRT position
  30. GRB 080506: Swift detection of a burst with optical afterglow
  31. GRB 080503: Late-time Optical rebrightening (possible mini-SN)
  32. GRB 080503, Swift-BAT lag and time-resolved spectral analysis
  33. GRB080503: Swift/UVOT Upper Limits
  34. GRB080503 XRT refined analysis
  35. GRB 080503, Swift-BAT refined analysis
  36. GRB 080430
  37. GRB 080503: Enhanced Swift-XRT position
  38. GRB 080503: MITSuME Akeno optical upper limits
  39. GRB 080503: New candidate afterglow/host in Gemini imaging
  40. GRB 080503: Optical afterglow candidate and LRIS spectroscopy of the short burst
  41. GRB 080503: Swift detection of a short burst
  42. GRB 080411: Continued Swift Monitoring
  43. GRB 080430: Optical observations
  44. GRB080430: Swift/UVOT observations
  45. GRB 080430 optical observations
  46. GRB 080430, Swift-BAT refined analysis
  47. GRB 080430: Swift-XRT refined analysis
  48. GRB 080430: Enhanced Swift-XRT position
  49. GRB 080430 - SDSS Pre-Burst Observations
  50. GRB 080430: Swift detection of a burst with optical afterglow
  51. GRB 080430: TAROT Calern observatory optical observations
  52. GRB080426: Observations from CAHA
  53. GRB 080426: Swift-XRT refined analysis
  54. GRB080426: Swift/UVOT upper limits
  55. GRB 080426: Enhanced Swift-XRT position
  56. GRB 080426, Swift-BAT refined analysis
  57. GRB 080426: Swift detection of a possibly short burst
  58. Possible GRB 080315: XRT non-detection of afterglow
  59. GRB 080320 : Faulkes Telescope North Observations
  60. GRB 080319A : Liverpool and Faulkes Telescopes Observations
  61. Swift-BAT trigger 309665 is not a GRB
  62. GRB 080420A: ROTSE-III Optical Limits on a possible short burst
  63. GRB 080420?: Swift detection of a possible short burst
  64. GRB 080413A: Suzaku/WAM and Swift/BAT joint spectral analysis
  65. Swift XRT and UVOT observations of GRB080414
  66. GRB 080319B: Jet Break, Energetics, Supernova
  67. GRB 080413A: Suzaku WAM observation of the prompt emission
  68. GRB 080413B: Suzaku WAM observation of the prompt emission
  69. GRB 080413B: Ep,i-Eiso correlation
  70. GRB080413B
  71. Swift-BAT spectral lag analysis of GRB 080413B
  72. GRB 080413B: Swift XRT refined analysis
  73. GRB080413A: Swift/UVOT observations
  74. GRB 080413B, Swift-BAT refined analysis
  75. GRB 080413A: Swift-XRT refined analysis
  76. GRB 080413A, Swift-BAT refined analysis
  77. GRB 080413B: GROND detection of afterglow in all bands
  78. GRB 080413B: Swift detection of a possibly short burst with optical counterpart
  79. GRB 080413: Enhanced Swift-XRT position
  80. GRB 080413: TAROT Calern observatory optical observations
  81. GRB 080413: Swift detection of a burst with an optical afterglow
  82. GRB 080413: ROTSE-III Detection of Optical Counterpart
  83. GRB 080411: Swift/UVOT refined analysis
  84. GRB 080411, Swift-BAT refined analysis
  85. GRB 080411: Swift-XRT Refined Analysis
  86. Konus-Wind observation of GRB 080411
  87. GRB 080411: Enhanced Swift-XRT position
  88. GRB 080411: GROND detection of optical afterglow candidate
  89. GRB 080411: Swift detection of a bright burst
  90. GRB 080330: Swift-XRT refined position retraction
  91. GRB 080409: Swift-BAT refined analysis
  92. GRB 080408: GROND detection of optical/NIR afterglow candidate
  93. Swift/UVOT observations of GRB080409
  94. GRB 080409: Swift XRT refined analysis
  95. UVOT/Swift Observations of GRB080408
  96. GRB 080408: Swift-XRT position of a possible afterglow
  97. GRB 080409: Enhanced Swift-XRT position
  98. GRB 080409: REM optical/NIR observations
  99. GRB 080409: Swift detection of a burst
  100. GRB 080319A: Early RAPTOR optical limits

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