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"

28118 results found.

  1. GRB 100420A: Swift/UVOT Upper Limits
  2. GRB 100420A: XRT refined analysis
  3. GRB 100420A: Enhanced Swift-XRT position
  4. GRB 100418A: SARA second epoch
  5. GRB 100420A: SARA Upper Limits
  6. GRB 100418A: optical observations
  7. GRB 100414A: Confirmation of the X-ray afterglow
  8. GRB 100418A: SMA submm detection
  9. GRB 100420A: Swift detection of a burst
  10. GRB 100418A PAIRITEL NIR Observations
  11. GRB 100418A: Swift/UVOT Observations
  12. GRB 100418A: Gemini-N redshift confirmation
  13. GRB 100418A: Swift-XRT Refined Analysis
  14. GRB100418A: VLT/X-shooter redshift and photometry
  15. GRB 100418A: SARA observations
  16. GRB 100418A: GROND observations; missing author list added
  17. GRB 100418A: GROND observations
  18. GRB 100418A: Swift-BAT refined analysis
  19. GRB 100418A: Enhanced Swift-XRT position
  20. GRB 100418A: Swift detection of a burst with a possible optical afterglow
  21. GRB 100413A: Radio Afterglow Detection with the EVLA
  22. GRB 100414A: Suzaku WAM observation of the prompt emission
  23. GRB 100414A: Swift/UVOT Observations
  24. GRB 100414A: GROND Detection of the Optical Afterglow
  25. GRB 100414A: Gemini-N candidate and redshift
  26. GRB 100414A: Enhanced Swift-XRT position of candidate afterglow
  27. GRB 100413A: Suzaku WAM observation of the prompt emission
  28. GRB 100414A: Palomar Transient Factory Observations
  29. GRB 100413B: Swift Confirmation of Burst
  30. GRB 100414A: Swift-XRT detection of a possible X-ray afterglow
  31. GRB 100413A: Swift-BAT final refined analysis
  32. GRB 100414A: Fermi GBM detection
  33. GRB100414A: Fermi LAT detection
  34. GRB 100413A: GROND Upper limits
  35. GRB 100413A: Swift/UVOT Upper Limits
  36. Konus-Wind observation of GRB 100413A
  37. GRB 100413A: Faulkes Telescope South observations
  38. GRB 100413A: SARA upper limit
  39. GRB 100413A: Swift-XRT Refined Analysis
  40. GRB 100413A: Swift-BAT initial refined analysis
  41. GRB 100413A: Enhanced Swift-XRT position
  42. GRB 100413A: Swift detection of a burst
  43. Spin down rate and inferred dipole magnetic field of the new soft gamma-ray repeater SGR 1833-0832
  44. Trigger 419015 is probably not a GRB
  45. GRB100401A: GROND Upper Limits
  46. INTEGRAL Alert n. 5995: MASTER-Net optical observations
  47. GRB 100331B: GROND Upper limits
  48. GRB 100401A: Fermi GBM detection
  49. GRB 100401A Burst, possibly short, detected in ground analysis of BAT data
  50. GRB 100331B: BOOTES-3 observations
  51. GRB 100324B: Suzaku WAM observation of the prompt emission
  52. GRB 100331B: Swift/UVOT Upper Limits
  53. GRB 100331B: Swift/XRT possible afterglow candidate
  54. Swift detection of LS V +44 17
  55. GRB 100331B: SuperAGILE Localization of a Long GRB
  56. INTEGRAL trigger 5994 / GRB 100331A: GROND detection of a variable source
  57. GRB 100331A: BOOTES-3 observations
  58. GRB 100331A: A long GRB detected by INTEGRAL
  59. GRB 100322A: Suzaku WAM observation of the prompt emission
  60. Fermi/GBM and Swift/BAT detection of a burst from SGR 1806-20
  61. GRB 100325A: Fermi LAT detection
  62. GROND observations of GRB100316D/SN2010bh
  63. GRB 100325A: Fermi GBM detection
  64. GRB 100324A: GROND observations
  65. GRB 100324A found in ground analysis of BAT data
  66. GRB 100322B or possible Galactic transient detected in ground analysis of BAT data
  67. SGR 1833-0832: Swift/UVOT Upper Limits
  68. GRB 100322A: Fermi GBM detection
  69. SGR 1833-0832: Archival Chandra Observations
  70. Discovery of the Spin Period of SGR 1833-0832
  71. GRB 100316D: ATCA radio observations
  72. Probable SGR 1833-0832: Swift-XRT refined analysis
  73. Probable SGR 1833-0832: Enhanced Swift-XRT position
  74. Swift-BAT refined analysis of the probable new SGR 1833-0832
  75. GRB 100219A: MASTER-Net optical alert observations
  76. GRB 100319A: Swift detection of a burst; possible SGR
  77. GRB 100316D: Possible Supernova
  78. GRB 100219A: optical upper limit
  79. GRB 100316A: optical observations in CrAO
  80. GRB 100316D: Swift/UVOT Observations
  81. GRB 100316D: Swift XRT enhanced position and further refined analysis
  82. GRB 100316B: Swift-XRT refined analysis
  83. Tentative redshift of GRB100316D from X-ray data
  84. GRB 100316C: GROND Detection of a Optical/NIR Afterglow Candidate
  85. GRB 100316D: GROND Detection of the Optical/NIR Afterglow Candidate
  86. GRB 100316D: Gemini/GMOS and VLT/X-shooter observations
  87. GRB 100316D: VLT/X-shooter observations
  88. GRB 100316D: Swift-BAT refined analysis
  89. GRB100316C: Swift/UVOT Upper Limits
  90. GRB 100316C: Swift-BAT refined analysis
  91. GRB 100316B: Swift/UVOT observations
  92. GRB 100316C: Swift-XRT team refined analysis
  93. GRB 100316C: Enhanced Swift-XRT position
  94. GRB 100316D: Swift XRT refined analysis
  95. GRB 100316A: TAROT Calern observatory optical observations
  96. GRB 100316A: Swift-XRT refined analysis
  97. GRB 100316B: Enhanced Swift-XRT position
  98. GRB 100316A: Swift-BAT refined analysis
  99. GRB 100316B: Swift-BAT refined analysis
  100. GRB100316A: Swift/UVOT Upper Limits

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