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"

19613 results found.

  1. GRB 080307, Swift-BAT refined analysis
  2. GRB080307 - SDSS Pre-Burst Observations
  3. GRB 080307: retraction of UVOT candidate
  4. GRB 080307: Enhanced Swift-XRT position
  5. GRB 080307, Preliminary Swift-BAT refined analysis
  6. GRB 080307: Swift detection of a burst
  7. VLA possible radio detection of GRB 080229
  8. GRB 080303: Swift/UVOT follow-up of afterglow detection
  9. GRB 080303, Swift-BAT refined analysis
  10. GRB080303: Swift XRT refined analysis
  11. GRB 080303: Enhanced Swift-XRT position
  12. Swift UVOT observations of GRB080229B
  13. GRB080229B: Swift XRT afterglow observation
  14. GRB 080303A: Faulkes Telescope South optical afterglow observations
  15. GRB 080303: Swift detection of a burst with optical afterglow
  16. GRB 080303A: ROTSE-III Optical Limits
  17. GRB 080229: I-band observations from OSN
  18. GRB080229: Swift XRT refined analysis
  19. GRB 080229: Enhanced Swift-XRT position
  20. UVOT analysis for GRB080229
  21. GRB 080229, Swift-BAT refined analysis
  22. GRB 080229: Faulkes Telescope South optical limit
  23. GRB 080229A: ROTSE-III Optical Limits
  24. GRB 080229: Swift detection of a bright burst
  25. Swift-XRT improved positions, and new redshift limits.
  26. ESO optical and NIR observations of GRB 080218B
  27. GRB 080204: Suzaku WAM observation of the prompt emission
  28. GRB 080218B, Swift-BAT refined analysis
  29. GRB 080218B: Swift-XRT refined analysis
  30. Swift/UVOT observations of GRB080218B
  31. GRB 080218B: Enhanced Swift-XRT position
  32. GRB 080218B: GROND upper limits
  33. GRB 080218A, Swift-BAT refined analysis
  34. GRB080218B: Watcher prompt limit
  35. GRB 080218B: Swift detection of a burst
  36. GRB 080218: Swift detection of a burst
  37. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  38. VLA radio upper limit on GRB 080212
  39. Swift/UVOT refined analysis of GRB080212
  40. GRB 080212, Swift-BAT refined analysis
  41. GRB 080212: GROND detects afterglow
  42. GRB 080212: optical observations
  43. GRB 080212: Enhanced Swift-XRT position
  44. GRB 080212: Swift-XRT Team refined analysis
  45. GRB 080210: Keck photometry
  46. VLA non-detection of GRB 080210
  47. GRB 080212: Swift detection of a burst
  48. GRB 080210: Swift/UVOT Refined Analysis
  49. GRB 080210, Swift-BAT refined analysis
  50. GRB 080210: Super-LOTIS observations
  51. GRB 080210: Swift-XRT Refined Analysis
  52. GRB 080210: Enhanced Swift-XRT position
  53. GRB 080210: GOND detection in all bands and redshift upper limit
  54. GRB080210 - SDSS Pre-Burst Observations
  55. GRB 080210: Swift detection of a burst with optical afterglow
  56. GRB 080210: TAROT La Silla observatory optical detection
  57. GRB 080207: GROND upper limits
  58. GRB 080207, Swift-BAT refined analysis
  59. Swift detection of AX J1749.1-2639
  60. GRB 080207, Swift-BAT refined analysis
  61. Swift Trigger 302777 is not a GRB
  62. GRB080207: Swift/UVOT refined analysis
  63. GRB 080207: TAROT Calern observatory optical observations
  64. GRB 080207: Swift-XRT Refined Analysis
  65. GRB 080207: Enhanced Swift-XRT position
  66. GRB 080207: Swift detection of a burst
  67. GRB 080205 optical upper limit
  68. VLA radio upper limit on GRB 080205
  69. GRB 080205, Swift-BAT refined analysis
  70. IPN localization of very hard GRB 080204
  71. GRB 080205: Swift XRT refined analysis
  72. GRB 080205: OA evolution from KAIT observations
  73. GRB 080205: Swift/UVOT observations
  74. GRB 080205: Enhanced Swift-XRT position
  75. GRB 080205: KAIT OA detection
  76. GRB 080205: Swift detection of a burst
  77. Swift-BAT Trigger #302454, correction of GCN notice, update on AX J1749.1-2639
  78. GRB 080130: Swift-BAT refined analysis
  79. GRB 080130: further Swift XRT observations confirm fading source
  80. GRB 080129: Swift/UVOT Refined Upper Limits
  81. Swift/UVOT observations of GRB080130
  82. GRB 080130(?): Swift XRT observation
  83. GRB 080129: Swift-XRT refined analysis
  84. GRB 080129: KAIT optical limits
  85. GRB 080129, Swift-BAT refined analysis
  86. GRB 080129: TAROT La Silla observatory optical observations
  87. GRB 080129: Gemini-South photometry
  88. GRB 080129: GROND detection in all bands, and fading
  89. GRB 080129: GROND detection of the optical/NIR afterglow, and fading
  90. GRB 080129: Enhanced Swift-XRT position
  91. GRB 080129: Swift XRT position
  92. GRB 080129 (?): UVOT Upper Limits
  93. GRB 080129 (?): Swift detection of a possible burst
  94. A new website of high-level data products for Swift GRBs
  95. GRB 080121: Upper limit on X-ray afterglow
  96. GRB 080123 : Suzaku WAM observation of the prompt emission
  97. Swift trigger(=301779) is not a GRB
  98. GRB 080121: Swift/UVOT upper limits
  99. SNe 2008D and 2007uy: Chandra Detections
  100. GRB 080121: 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