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"

19607 results found.

  1. GRB 080330, Swift-BAT refined analysis
  2. Konus-Wind observation of GRB 080328
  3. GRB 080330: GROND Observations
  4. GRB 080330: TAROT Calern observatory optical observations
  5. GRB 080330: error in reported XRT position
  6. GRB080330 - SDSS Pre-Burst Observations
  7. GRB 080330: Liverpool Telescope Optical observations
  8. GRB 080330A: ROTSE-III Detection of Optical Counterpart
  9. GRB 080330: Swift detection of a burst with an optical counterpart
  10. GRB 080330: TAROT Calern observatory optical detection
  11. GRB 080328: BTA optical imaging and spectroscopy
  12. GRB 080328, Swift-BAT refined analysis
  13. GRB 080328: Swift XRT refined analysis
  14. GRB 080325, Swift-BAT refined analysis
  15. Swift/UVOT observations of GRB080328
  16. GRB 080328: Enhanced Swift-XRT position
  17. GRB080328: Faulkes Telescope North observations
  18. GRB 080328: Swift detection of a burst with an optical counterpart
  19. GRB 080325: Subaru detection of NIR afterglow candidate
  20. GRB080325: XRT Refined Analysis
  21. GRB 080325: GROND Observations
  22. GRB 080325: Swift/UVOT Upper Limits
  23. GRB 080319D: GROND Detection of the Optical Counterpart
  24. GRB 080325: Enhanced Swift-XRT position
  25. GRB 080325: Swift detection of a burst
  26. GRB 080319B : Apparent spectral evolution in very early Swift/XRT WT mode data: intrinsic or pile-up effect?
  27. GRB 080319C: Suzaku WAM observation of the prompt emission
  28. GRB 080320, Swift-BAT refined analysis
  29. GRB 080319D: GROND Observations
  30. GRB 080319D, Swift-BAT refined analysis
  31. GRB 080319C: UVOT Observations
  32. GRB 080319B: UVOT Observations
  33. GRB 080319A: UVOT Observations
  34. GRB 080320: Swift XRT refined analysis
  35. GRB 080320: Early Super-LOTIS Observations
  36. GRB 080319D: Swift XRT refined analysis
  37. Konus-Wind observation of GRB 080319C
  38. GRB 080319C, Swift-BAT refined analysis
  39. Konus-Wind observation of GRB 080319B
  40. GRB 080320: Enhanced Swift-XRT position
  41. GRB 080319C: Early RAPTOR Observations
  42. GRB 080319B: second epoch imaging from Canarias (correction to GCN7469)
  43. GRB 080320 - SDSS Pre-Burst Observations
  44. GRB 080320: Swift detection of a burst
  45. GRB 080320: ROTSE-III Optical Limits
  46. GRB 080319B: ROTSE-III Observations of Optical Counterpart
  47. GRB 080319B: optical observations
  48. Swift-BAT trigger 306829 is IGR J16479-4514
  49. GRB 080319B: RAPTOR observations of a naked eye burst
  50. GRB 080319A: Swift-XRT Team Refined Analysis
  51. GRB 080319B, Swift-BAT refined analysis
  52. GRB 080319C: Swift-XRT Team Refined Analysis
  53. GRB 080319B: Swift-XRT Team Refined Analysis
  54. GRB 080319D: Swift/UVOT Refined Analysis of the Fading Optical Afterglow Candidate
  55. GRB 080319C: AGILE-MCAL observation of the prompt emission
  56. GRB 080319D: MASTER-VWF-Kislovodsk optical observation
  57. GRB 080319C: MASTER-VWF-Kislovodsk optical observation
  58. GRB 080319D: Swift detection of a burst with a possible optical afterglow
  59. GRB 080319B: TORTORA synchronous observation
  60. GRB 080319A/B/C: INTEGRAL SPI-ACS light curves available
  61. GRB 080319B: Enhanced Swift-XRT position
  62. GRB 080319A: Enhanced Swift-XRT position
  63. GRB 080319A, Swift-BAT refined analysis
  64. GRB 080319C: Early Super-LOTIS Observations
  65. GRB 080319C: Swift detection of a burst with an optical afterglow
  66. GRB 080319C: KAIT OA candidate
  67. GRB 080319b prompt optical observation by Pi-of-the-Sky
  68. GRB 080319B: Gemini-South Spectroscopy
  69. GRB080319B Liverpool Telescope optical afterglow candidate
  70. GRB 080319B: Super-LOTIS Detection of a Bright OT
  71. GRB 080319B: KAIT OA
  72. GRB 080319B: UVOT Position
  73. GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
  74. GRB 080319A: Swift detection of a burst
  75. Swift Trigger 306745 is not a GRB
  76. Swift Trigger 306616 is not a GRB
  77. Swift/UVOT observations of GRB 080315
  78. Swift trigger 306323: Swift-BAT/XRT refined analysis
  79. SAX J1818.6-1703: Swift detection (trigger 306379)
  80. GRB 080315: TAROT Calern observatory optical observations
  81. GRB 080315: Swift detection of a possible burst
  82. GRB 080310: ROTSE-III Observations of Optical Counterpart
  83. GRB 080310, Swift-BAT refined analysis
  84. GRB 080310: Swift-XRT refined analysis
  85. GRB 080310: Swift/UVOT Refined Analysis
  86. GRB 080310 - SDSS Pre-Burst Observations
  87. GRB 080310: Enhanced Swift-XRT position
  88. GRB 080310: VLT/UVES spectroscopy
  89. GRB080310: Super-LOTIS suggestion of brightening
  90. GRB 080310: Swift detection of a burst with optical afterglow
  91. GRB080229, optical upper limit (Correction)
  92. GRB080307, optical upper limit
  93. GRB080229, optical upper limit
  94. GRB 080307: Swift-XRT Team refined analysis
  95. GRB 080307: Swift/UVOT Upper Limits
  96. GRB 080307: Early RAPTOR Limits
  97. GRB 080307, Swift-BAT refined analysis
  98. GRB080307 - SDSS Pre-Burst Observations
  99. GRB 080307: retraction of UVOT candidate
  100. GRB 080307: Enhanced Swift-XRT position

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