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"

21912 results found.

  1. GRB 080810, Swift-BAT refined analysis
  2. GRB 080810 : optical observation with KANATA
  3. GRB 080810: Swift detection of a burst with a bright optical afterglow
  4. GRB 080723B: GROND upper limits
  5. GRB 080805: Faulkes Telescope South optical observations
  6. GRB 080804: GROND observations
  7. GRB 080727B: Late VLT imaging
  8. GRB 080804: ATCA Radio Observations
  9. GRB 080805: Swift-XRT Refined Analysis
  10. GRB 080805: Swift/UVOT Upper Limits
  11. GRB 080804: Enhanced Swift-XRT position
  12. GRB080804: Gemini South redshift confirmation
  13. GRB 080804: Faulkes Telescope South observations
  14. GRB080805 optical limit by "Pi of the Sky"
  15. GRB 080805: Afterglow confirmation
  16. GRB 080805: GROND detection of possible afterglow
  17. GRB 080805: Swift detection of a burst
  18. GRB 080804: Swift detection of a burst with optical afterglow
  19. GRB 080802: Swift/UVOT Upper Limits
  20. GRB 080802: UVI Telescope Upper Limit
  21. GRB 080802: Swift detection of a probable burst
  22. GRB 080727C: Suzaku WAM observation of the prompt emission
  23. GRB 080727B: IR photometry
  24. GRB 080727C: TAROT Calern observatory optical observations
  25. GRB 080727B: KAIT photometry and an early lightcurve break
  26. GRB 080727C, Swift-BAT refined analysis
  27. GRB 080727C: Swift/UVOT Upper Limits
  28. GRB 080727C: Liverpool Telescope observations
  29. GRB 080727A: VLT upper limits
  30. GRB 080727C: Enhanced Swift-XRT position
  31. GRB080727C: RTT150 optical observations
  32. GRB 080727C: Swift detection of a burst
  33. Swift detection of XTE J1701-407
  34. GRB 080727B: Swift/UVOT Upper Limits
  35. GRB 080727A, Swift-BAT refined analysis
  36. GRB 080727A: Swift-XRT refined analysis
  37. GRB080727A: Swift/UVOT Upper Limits
  38. GRB 080727B: Enhanced Swift-XRT position
  39. GRB 080727A: Enhanced Swift-XRT position
  40. GRB 080727B: REM prompt observations
  41. GRB 080727B: Swift detection of a bright burst
  42. GRB 080727: Swift detection of a burst
  43. GRB 080726: GRB Localization by SuperAGILE
  44. GRB 080725, Swift-BAT refined analysis
  45. GRB 080723A: optical upper limit
  46. GRB080723B: Swift/UVOT Upper Limits
  47. GRB 080725: REM prompt observations
  48. Konus-Wind observation of GRB 080723B
  49. GRB 080723A: Swift/UVOT Upper Limits
  50. VLA radio upper limit on GRB 080721
  51. GRB 080723, Swift-BAT refined analysis
  52. GRB 080723B : a long GRB detected with INTEGRAL
  53. GRB 080723: Enhanced Swift-XRT position
  54. GRB 080723: Swift detection of a burst
  55. Konus-Wind observation of GRB 080721
  56. GRB 080721: Enhanced Swift-XRT position
  57. GRB 080721, Swift-BAT refined analysis
  58. GRB 080721: Swift detection of a burst with a bright optical counterpart.
  59. Trigger 317393: Swift detection of a possible GRB
  60. Trigger 317205: Swift detection of an outburst from XTE J1701-407
  61. GRB 080714: GROND confirmation of the optical/NIR afterglow
  62. GRB 080714: Swift/UVOT Detection of an Optical Afterglow
  63. GRB 080714: Enhanced Swift-XRT position
  64. GRB 080714: Swift-BAT refined analysis
  65. GRB 080714: Swift detection of a burst
  66. GRB 080702A: optical upper limit
  67. GRB 080603A: CrAO optical observations
  68. GRB 080702B: Swift XRT confirmation of the afterglow
  69. GRB 080710: Lick IR detection
  70. GRB 080710: Swift-XRT refined analysis
  71. GRB080710: Swift/UVOT observations
  72. GRB 080710: Enhanced Swift-XRT position
  73. UVOT white band observations of GRB080710
  74. GRB 080710: REM afterglow confirmation & brightening
  75. GRB 080710: Swift XRT position
  76. GRB 080707: GROND Confirmation of the Optical Afterglow
  77. UVOT observations of GRB080707
  78. GRB 080707: Swift XRT refined analysis
  79. GRB 080707: Enhanced Swift-XRT position
  80. GRB 080707: VLT redshift
  81. GRB 080707: GROND Detection of the Optical Afterglow Candidate
  82. GRB 080707: Swift detection of a burst
  83. Trigger 316063: Swift detection of a transient
  84. GRB 080703: GROND Upper Limits
  85. GRB 080702B: GROND Upper Limits
  86. GRB 080703: VLT observations of the afterglow
  87. GRB 080703: Enhanced Swift-XRT position
  88. GRB 080703, Swift-BAT refined analysis
  89. GRB 080703: Swift detection of a burst with optical afterglow
  90. No radio detection from the short GRB 080702A
  91. Swift/UVOT observation of GRB080702A
  92. GRB 080702B: Swift XRT and UVOT observations
  93. GRB 080625: Suzaku WAM observation of the prompt emission
  94. GRB 080701A: Early RAPTOR optical limits
  95. Swift Trigger 315630: Swift/UVOT Upper Limits
  96. GRB 080702A: Swift-XRT Team refined analysis
  97. GRB 080702B : Burst detected in BAT during Swift slew
  98. GRB 080702A: Enhanced Swift-XRT position
  99. Swift Trigger 315630: TLS R-band observation
  100. Swift Trigger 315630: Probably not a GRB

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