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"

28117 results found.

  1. GRB 080413B: Swift detection of a possibly short burst with optical counterpart
  2. GRB 080413A: REM detection of the NIR Afterglow
  3. GRB 080413: Enhanced Swift-XRT position
  4. GRB 080413: TAROT Calern observatory optical observations
  5. GRB 080413: Swift detection of a burst with an optical afterglow
  6. GRB 080413: ROTSE-III Detection of Optical Counterpart
  7. GRB 080411: Swift/UVOT refined analysis
  8. GRB 080411, Swift-BAT refined analysis
  9. GRB 080411: Swift-XRT Refined Analysis
  10. GRB 080411: Enhanced Swift-XRT position
  11. GRB 080411: GROND detection of optical afterglow candidate
  12. GRB 080411: Swift detection of a bright burst
  13. GRB 080409: Swift-BAT refined analysis
  14. GRB 080408: GROND detection of optical/NIR afterglow candidate
  15. GRB 080330 optical observations
  16. Swift/UVOT observations of GRB080409
  17. GRB 080409: Swift XRT refined analysis
  18. GRB 080408: Swift-XRT position of a possible afterglow
  19. GRB 080409: Enhanced Swift-XRT position
  20. GRB 080409: REM optical/NIR observations
  21. GRB 080409: Swift detection of a burst
  22. GRB 080408: Analysis of AGILE Gamma-ray data
  23. GRB 080408: GRB Localization by SuperAGILE
  24. GRB 080319A: Early RAPTOR optical limits
  25. GRB 080319B: HST observations
  26. GRB 080319B: Potential Jet Break Observed by Swift-XRT and UVOT
  27. GRB 080405: Swift-BAT refined analysis
  28. GRB 080405: Swift-XRT position
  29. GRB 080405: Mars Oddysey and Swift-BAT detection, possible host galaxy
  30. GRB 080325: optical upper limit
  31. GRB 080328: GAO 150cm telescope Optical Observation
  32. GRB080330: Improved Swift XRT Position
  33. GRB080330: optical observations
  34. GRB080328, RIMOTS optical upper limit
  35. GRB080330: Swift XRT refined analysis
  36. GRB 080330: REM optical observations
  37. GRB 080330 Swift-UVOT refined analysis
  38. GRB 080328: Suzaku WAM observation of the prompt emission
  39. GRB080330: TNT optical observations
  40. GRB 080330, Swift-BAT refined analysis
  41. Konus-Wind observation of GRB 080328
  42. GRB 080330: GROND Observations
  43. GRB 080330: TAROT Calern observatory optical observations
  44. GRB 080330A: PAIRITEL Infrared Detections
  45. GRB 080330: error in reported XRT position
  46. GRB080330 - SDSS Pre-Burst Observations
  47. GRB 080330A: ROTSE-III Detection of Optical Counterpart
  48. GRB 080330: Swift detection of a burst with an optical counterpart
  49. GRB 080330: TAROT Calern observatory optical detection
  50. GRB 080328, Swift-BAT refined analysis
  51. GRB 080325, Swift-BAT refined analysis
  52. Swift/UVOT observations of GRB080328
  53. GRB080319B, BVRcIc field calibration
  54. GRB 080328: Enhanced Swift-XRT position
  55. GRB 080328: Swift detection of a burst with an optical counterpart
  56. GRB 080325: Subaru detection of NIR afterglow candidate
  57. GRB 080325: GROND Observations
  58. GRB 080325: Swift/UVOT Upper Limits
  59. GRB 080325: Early observations from OSN
  60. GRB 080325: NIR afterglow candidate
  61. GRB 080319D: GROND Detection of the Optical Counterpart
  62. GRB 080325: Enhanced Swift-XRT position
  63. GRB 080325: Swift detection of a burst
  64. GRB 080319B : Apparent spectral evolution in very early Swift/XRT WT mode data: intrinsic or pile-up effect?
  65. GRB 080319B: Spitzer Mid-infrared Observations
  66. GRB 080319C: Suzaku WAM observation of the prompt emission
  67. Radio Detection of GRB 080319B
  68. GRB 080320, Swift-BAT refined analysis
  69. GRB 080319D: GROND Observations
  70. GRB 080319B: optical upper limit
  71. GRB 080319D: optical upper limit
  72. GRB 080319D, Swift-BAT refined analysis
  73. GRB 080319C: UVOT Observations
  74. GRB 080319B: UVOT Observations
  75. GRB 080319A: UVOT Observations
  76. GRB 080320: Swift XRT refined analysis
  77. GRB 080320: J detection with FLAMINGOS
  78. GRB 080319D: Swift XRT refined analysis
  79. GRB 080320: optical limit
  80. GRB 080320: Gemini-N optical afterglow
  81. GRB 080319C, Swift-BAT refined analysis
  82. GRB 080320: Enhanced Swift-XRT position
  83. GRB 080320 - SDSS Pre-Burst Observations
  84. GRB 080320: Swift detection of a burst
  85. GRB 080319B : Lulin observation of temporal break at 0.2 days
  86. GRB 080319C - SDSS Pre-Burst Observations
  87. GRB 080319A SDSS Pre-Burst Observations
  88. GRB080319B - SDSS Pre-Burst Observations
  89. GRB 080319A: Swift-XRT Team Refined Analysis
  90. GRB 080319B, Swift-BAT refined analysis
  91. GRB 080319C: Swift-XRT Team Refined Analysis
  92. GRB 080319B: Swift-XRT Team Refined Analysis
  93. GRB 080319D: Swift/UVOT Refined Analysis of the Fading Optical Afterglow Candidate
  94. GRB 080319C: AGILE-MCAL observation of the prompt emission
  95. GRB 080319D: MASTER-VWF-Kislovodsk optical observation
  96. GRB 080319C: MASTER-VWF-Kislovodsk optical observation
  97. GRB 080319D: Swift detection of a burst with a possible optical afterglow
  98. GRB 080319B: TORTORA synchronous observation
  99. GRB 080319B: Enhanced Swift-XRT position
  100. GRB 080319A: 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