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"

45625 results found.

  1. GRB 101213A: Enhanced Swift-XRT position
  2. GRB 101213: object within the X-ray error circle
  3. GRB 101213A: Swift detection of a burst
  4. GRB101204A: Swift/UVOT observations
  5. GRB 101204A: Swift-XRT refined Analysis
  6. GRB101204A GROND Detection of the Optical/NIR Afterglow
  7. GRB 101204A Afterglow Candidate, VATT Observations
  8. GRB 101129A : Suzaku WAM observation of the prompt emission
  9. GRB 101204A Swift-XRT/UVOT afterglow candidate
  10. Konus-Wind observation of GRB 101130A
  11. GRB 101204A detected in ground analysis of BAT data
  12. Konus-Wind observation of GRB 101129A
  13. IPN Localization of GRB101130 (possible short duration burst)
  14. GRB 101129A SHB found by IPN and in ground analysis of BAT data
  15. GRB101030A
  16. GRB 101201A: Fermi GBM observation
  17. GRB 101201A: Swift-XRT refined Analysis
  18. GRB 101201A: Swift/UVOT Detection
  19. GRB 101201A: GROND Detection of the Optical/NIR Afterglow
  20. GRB 101201A detected in ground analysis of BAT data
  21. Swift detection of MAXIJ1409-619
  22. GRB 101123A: ROTSE optical observations
  23. GRB 101123A: MASTER prompt optical observations
  24. Konus-Wind observation of GRB 101123A
  25. IPN triangulation of bright GRB 101123A
  26. GRB 101123A: Fermi GBM detection
  27. Optical observation of GRB 101024A
  28. GRB 101117B: GROND Upper limits
  29. GRB 101117B: Swift/UVOT Observations of the Optical Afterglow
  30. GRB 101112A: OSN and BTA observations
  31. XRF 101117A: Palomar Transient Factory Observations
  32. GRB 101117B: Swift-XRT refined analysis
  33. GRB101114A: Swift/UVOT Upper Limits
  34. GRB 101114A: Confirmation of the X-ray afterglow
  35. GRB 101117B: Swift-BAT refined analysis
  36. GRB 101117B: Enhanced Swift-XRT position
  37. GRB 101117B: Swift/UVOT Discovery of an Optical Afterglow
  38. GRB 101117B: Swift detection of a burst
  39. XRF101117A: MAXI/GSC detection of a short X-ray transient
  40. GRB 101114A: GROND Upper limits
  41. Konus-Wind observation of GRB 101114A
  42. Fermi GBM detection of a burst from a galactic source
  43. GRB 101114A: Swift-XRT candidate afterglow detection and analysis
  44. GRB 101114A, Swift-BAT GRB detected by ground processing
  45. Possible detection of INTEGRAL burst GRB 101112A by the EVLA
  46. GRB 101112A: Fermi GBM detection
  47. GRB 101112A: optical observations
  48. GRB 10112A: MASTER optical observations
  49. Konus-Wind observation of GRB 101112A
  50. GRB 101112A - XRT source detection/analysis
  51. GRB 101112A: BOOTES-2/TELMA optical afterglow candidate
  52. GRB101112A: Liverpool Telescope Afterglow Candidate
  53. GRB 101112A: a long GRB detected by INTEGRAL
  54. GRB 100906A: optical observations
  55. GRB 090113, the review of the sky area in plate archives
  56. GRB 101030A : MOA optical observation
  57. GRB 101030A: GROND optical/NIR afterglow candidate
  58. GRB 101030A : Swift XRT refined analysis
  59. GRB 101030A: Swift/UVOT Upper Limits
  60. GRB 101030A: Swift-BAT refined analysis
  61. GRB 101030A: Enhanced Swift-XRT position
  62. GRB 101030A: Swift detection of a burst
  63. GRB 090111, the review of the sky area in plate archives (1976-1996)
  64. Konus-Wind observation of GRB 101023A
  65. GRB 101024A: GROND optical/NIR observations
  66. GRB 101024A: Zadko observatory - Gingin. Optical observations refined analysis
  67. GRB 101024A: Swift XRT refined analysis
  68. GRB 101024A: Zadko observatory - Gingin. Optical observations
  69. GRB 101023A: miniTAO/ANIR NIR detection
  70. GRB 101024A: Fermi GBM observation
  71. GRB 101023A: Fermi GBM observation
  72. GRB101024A: Swift/UVOT
  73. GRB 101024A: Swift-BAT refined analysis
  74. GRB 101024A: GRAS06 optical observations
  75. GRB 101024A: Enhanced Swift-XRT position
  76. Swift/UVOT observations of GRB101023A
  77. GRB 101024A: Swift detection of a burst with an optical afterglow
  78. GGRB 101023A: GROND detection of the optical-NIR afterglow
  79. GRB 101023A: Swift-XRT Team Refined Analysis
  80. GRB 101023A: Swift-BAT refined analysis
  81. GRB 101023A: Gemini discovery of optical afterglow
  82. GRB 101023A: Enhanced Swift-XRT position
  83. GRB 101023A: REM NIR observations
  84. GRB 101023A: Swift detection of a burst
  85. GRB 101011A: miniTAO/ANIR NIR upper limits
  86. GRB 101020A: MASTER prompt and afterglow limit
  87. GRB 101020A: BOOTES2 follow-up and limit
  88. GRB 101020A: MASTER polarization optical observations
  89. GRB 101020A, Swift-BAT refined analysis
  90. GRB 101020A: Swift detection of a burst
  91. GRB 101017A: miniTAO/ANIR NIR upper limits
  92. GRB 101017A: Swift XRT refined analysis
  93. GRB 101017A: Swift/UVOT Observations
  94. GRB 101008A: correction to the GCN 11352
  95. GRB 101008A: optical observations
  96. GRB101017A: MITSuME Okayama optical upper limits
  97. Konus-Wind observation of GRB 101017A
  98. GRB 101014A: Fermi LAT detection
  99. GRB 101017A: Enhanced Swift-XRT position
  100. GRB 101017A: Swift-BAT refined analysis

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