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"

19662 results found.

  1. GRB 080430: TAROT Calern observatory optical observations
  2. GRB 080426: Swift-XRT refined analysis
  3. GRB080426: Swift/UVOT upper limits
  4. GRB 080426: Enhanced Swift-XRT position
  5. GRB 080426, Swift-BAT refined analysis
  6. GRB 080426: Swift detection of a possibly short burst
  7. Possible GRB 080315: XRT non-detection of afterglow
  8. Swift-BAT trigger 309665 is not a GRB
  9. GRB 080420A: ROTSE-III Optical Limits on a possible short burst
  10. GRB 080420?: Swift detection of a possible short burst
  11. GRB 080413A: Suzaku/WAM and Swift/BAT joint spectral analysis
  12. Swift XRT and UVOT observations of GRB080414
  13. GRB 080319B: Jet Break, Energetics, Supernova
  14. GRB 080413A: Suzaku WAM observation of the prompt emission
  15. GRB 080413B: Suzaku WAM observation of the prompt emission
  16. GRB 080413B: Ep,i-Eiso correlation
  17. GRB080413B
  18. Swift-BAT spectral lag analysis of GRB 080413B
  19. GRB 080413B: Swift XRT refined analysis
  20. GRB080413A: Swift/UVOT observations
  21. GRB 080413B, Swift-BAT refined analysis
  22. GRB 080413A: Swift-XRT refined analysis
  23. GRB 080413A, Swift-BAT refined analysis
  24. GRB 080413B: GROND detection of afterglow in all bands
  25. GRB 080413B: Swift detection of a possibly short burst with optical counterpart
  26. GRB 080413: Enhanced Swift-XRT position
  27. GRB 080413: TAROT Calern observatory optical observations
  28. GRB 080413: Swift detection of a burst with an optical afterglow
  29. GRB 080413: ROTSE-III Detection of Optical Counterpart
  30. GRB 080411: Swift/UVOT refined analysis
  31. GRB 080411, Swift-BAT refined analysis
  32. GRB 080411: Swift-XRT Refined Analysis
  33. Konus-Wind observation of GRB 080411
  34. GRB 080411: Enhanced Swift-XRT position
  35. GRB 080411: Swift detection of a bright burst
  36. GRB 080330: Swift-XRT refined position retraction
  37. GRB 080409: Swift-BAT refined analysis
  38. Swift/UVOT observations of GRB080409
  39. GRB 080409: Swift XRT refined analysis
  40. UVOT/Swift Observations of GRB080408
  41. GRB 080408: Swift-XRT position of a possible afterglow
  42. GRB 080409: Enhanced Swift-XRT position
  43. GRB 080409: Swift detection of a burst
  44. GRB 080319A: Early RAPTOR optical limits
  45. GRB 080330: RAPTOR detection of prompt optical flash
  46. GRB 080319B: Potential Jet Break Observed by Swift-XRT and UVOT
  47. GRB 080405: Swift-BAT refined analysis
  48. GRB 080405: Swift-XRT position
  49. GRB 080405: Mars Oddysey and Swift-BAT detection, possible host galaxy
  50. GRB 080325: optical upper limit
  51. GRB080330: Improved Swift XRT Position
  52. GRB080328, RIMOTS optical upper limit
  53. GRB080330: Swift XRT refined analysis
  54. GRB 080330 Swift-UVOT refined analysis
  55. GRB 080328: Suzaku WAM observation of the prompt emission
  56. GRB 080330, Swift-BAT refined analysis
  57. Konus-Wind observation of GRB 080328
  58. GRB 080330: GROND Observations
  59. GRB 080330: TAROT Calern observatory optical observations
  60. GRB 080330: error in reported XRT position
  61. GRB080330 - SDSS Pre-Burst Observations
  62. GRB 080330: Liverpool Telescope Optical observations
  63. GRB 080330A: ROTSE-III Detection of Optical Counterpart
  64. GRB 080330: Swift detection of a burst with an optical counterpart
  65. GRB 080330: TAROT Calern observatory optical detection
  66. GRB 080328: BTA optical imaging and spectroscopy
  67. GRB 080328, Swift-BAT refined analysis
  68. GRB 080328: Swift XRT refined analysis
  69. GRB 080325, Swift-BAT refined analysis
  70. Swift/UVOT observations of GRB080328
  71. GRB 080328: Enhanced Swift-XRT position
  72. GRB080328: Faulkes Telescope North observations
  73. GRB 080328: Swift detection of a burst with an optical counterpart
  74. GRB 080325: Subaru detection of NIR afterglow candidate
  75. GRB080325: XRT Refined Analysis
  76. GRB 080325: GROND Observations
  77. GRB 080325: Swift/UVOT Upper Limits
  78. GRB 080319D: GROND Detection of the Optical Counterpart
  79. GRB 080325: Enhanced Swift-XRT position
  80. GRB 080325: Swift detection of a burst
  81. GRB 080319B : Apparent spectral evolution in very early Swift/XRT WT mode data: intrinsic or pile-up effect?
  82. GRB 080319C: Suzaku WAM observation of the prompt emission
  83. GRB 080320, Swift-BAT refined analysis
  84. GRB 080319D: GROND Observations
  85. GRB 080319D, Swift-BAT refined analysis
  86. GRB 080319C: UVOT Observations
  87. GRB 080319B: UVOT Observations
  88. GRB 080319A: UVOT Observations
  89. GRB 080320: Swift XRT refined analysis
  90. GRB 080320: Early Super-LOTIS Observations
  91. GRB 080319D: Swift XRT refined analysis
  92. Konus-Wind observation of GRB 080319C
  93. GRB 080319C, Swift-BAT refined analysis
  94. Konus-Wind observation of GRB 080319B
  95. GRB 080320: Enhanced Swift-XRT position
  96. GRB 080319C: Early RAPTOR Observations
  97. GRB 080319B: second epoch imaging from Canarias (correction to GCN7469)
  98. GRB 080320 - SDSS Pre-Burst Observations
  99. GRB 080320: Swift detection of a burst
  100. GRB 080320: ROTSE-III 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