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"

12126 results found.

  1. GRB 080408: GRB Localization by SuperAGILE
  2. GRB 080405: Swift-BAT refined analysis
  3. GRB 080330, SMARTS optical/IR afterglow observations
  4. Konus-Wind observation of GRB 080328
  5. GRB 080319B: Continued Gemini-South followup and possible host galaxy
  6. GRB 080325, Swift-BAT refined analysis
  7. GRB 080325: GROND Observations
  8. GRB080319B: optical observations
  9. GRB 080325: Early observations from OSN
  10. GRB 080319B : Apparent spectral evolution in very early Swift/XRT WT mode data: intrinsic or pile-up effect?
  11. GRB 080319D: optical upper limit
  12. GRB 080319B - CARMA mm Observations
  13. GRB 080320: J detection with FLAMINGOS
  14. GRB 080319D: Swift XRT refined analysis
  15. Konus-Wind observation of GRB 080319C
  16. GRB 080319B: Gemini-South photometry
  17. GRB 080319B: Allen Telescope Array Observations
  18. Konus-Wind observation of GRB 080319B
  19. GRB 080319B: WSRT Radio Observations
  20. GRB 080320: Swift detection of a burst
  21. GRB 080320: ROTSE-III Optical Limits
  22. GRB 080319C: Swift detection of a burst with an optical afterglow
  23. GRB 080319B: Change in power law decay index
  24. GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
  25. Swift trigger 306323: Swift-BAT/XRT refined analysis
  26. GRB080310: Optical observation by MITSuME telescope
  27. GRB 080310, Swift-BAT refined analysis
  28. GRB080307: optical upper limit
  29. GRB080310 : Lulin optical observation
  30. GRB 080310: RRM optical photometry with the VLT
  31. GRB 080310, SMARTS optical/IR afterglow observations
  32. GRB080307, optical upper limit
  33. GRB080229, optical upper limit
  34. GRB080307: Optical upper limits
  35. GRB 080307, Preliminary Swift-BAT refined analysis
  36. GRB 080303, Swift-BAT refined analysis
  37. GRB 080303A: ROTSE-III Optical Limits
  38. GRB 080229B: Gamma Ray Burst Localization by SuperAGILE
  39. GRB 080229A: ROTSE-III Optical Limits
  40. GRB 080229: Swift detection of a bright burst
  41. GRB080207: optical observations
  42. Swift-XRT improved positions, and new redshift limits.
  43. GRB 080218B: GROND upper limits
  44. GRB 080218: Swift detection of a burst
  45. Konus-Wind observation of GRB 080211
  46. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  47. GRB 080212: GROND detects afterglow
  48. GRB 080212: Swift detection of a burst
  49. IPN localization of GRB 080211
  50. GRB 080210: GOND detection in all bands and redshift upper limit
  51. GRB 080205: GAO 150cm telescope Optical limit
  52. GRB 080207, Swift-BAT refined analysis
  53. Swift detection of AX J1749.1-2639
  54. GRB 080207, Swift-BAT refined analysis
  55. GRB080207: RTT150 Optical Observations
  56. GRB 080207: TAROT Calern observatory optical observations
  57. GRB 080207: Swift detection of a burst
  58. Konus-Wind observation of GRB 080204
  59. GRB 080205 optical upper limit
  60. GRB 080205: optical observation
  61. IPN localization of very hard GRB 080204
  62. GRB 080205: Swift XRT refined analysis
  63. GRB 080130: further Swift XRT observations confirm fading source
  64. GRB 080130?: Detection of a possible burst by BATSS
  65. GRB 080129: Swift-XRT refined analysis
  66. GRB 080129: KAIT optical limits
  67. GRB 080123: Early afterglow detection with BATSS (BAT Slew Survey)
  68. GRB 080129: optical limit by Pi of the Sky
  69. GRB 080129, Swift-BAT refined analysis
  70. A new website of high-level data products for Swift GRBs
  71. GRB 080121: Upper limit on X-ray afterglow
  72. Konus-Wind observation of GRB 080122
  73. SNe 2008D and 2007uy: Chandra Detections
  74. IPN triangulation of GRB080122
  75. GRB 080123, Swift-BAT refined analysis
  76. GRB 080120: Swift-XRT refined analysis
  77. GRB 080120: GROND detection
  78. GRB 080120 : Planned XMM-Newton observation
  79. GRB 080120: a long GRB detected by INTEGRAL
  80. Transient XRF 080109 / SN 2008D: Mount Abu NIR observations
  81. XRB 080109/SN 2008D: Early decline in brightness and change in colors
  82. XRB 080109/SN 2008D:PAIRITEL NIR observations and t_0 from Swift
  83. XRF 080109 in NGC2770: Detectable Superluminal Motion
  84. XRF in NGC 2770: Search for X-ray periodicity
  85. Bright X-ray Transient in NGC 2770 - A low-luminosity XRF?
  86. GRB 071227: Suzaku WAM observation of the prompt emission
  87. Konus-Wind observation of GRB 071227
  88. GRB 071227: Swift-XRT refined analysis
  89. GRB 071227: Swift detection of a burst
  90. GRB 071125: Suzaku WAM observation of the prompt emission
  91. Konus-Wind and Konus-A observations of GRB 071125
  92. IPN triangulation of very bright GRB 071125
  93. Disregard the "GRB 071126" position
  94. GRB071122: Swift/UVOT Observations
  95. GRB 071122: ROTSE-III Optical Limits
  96. GRB071118 MITSuME OAO optical observation
  97. GRB 071117: Swift-XRT revised position
  98. Konus-Wind and Konus-A observations of GRB 071117
  99. Swift/UVOT upper limits for GRB 071117
  100. GRB 071117: Gemini Optical Afterglow Discovery

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