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"

27829 results found.

  1. GRB060614 ATCA Radio Limits
  2. GRB 060218 (SN 2006aj): IR afterglow detection six months after the
  3. GRB 060714: Swift/UVOT Observations
  4. GRB 060522: VLA observation
  5. GRB 060719: Swift/UVOT Upper Limits
  6. GRB 060719: Refined analysis of the Swift-BAT burst
  7. GRB 060719: XRT refined analysis
  8. GRB 060719: optical limit by Pi-of-the-Sky
  9. GRB060719: FRAM early follow-up limit
  10. GRB 060719: Swift detection of a burst
  11. GRB 060717: Swift XRT refined analysis
  12. GRB 060714: OA fading and a possible host detection
  13. GRB 060714: Refined analysis of the Swift-BAT burst
  14. GRB060717: Swift/UVOT upper limits
  15. GRB 060717: Swift XRT refined position
  16. GRB 060717: Swift-BAT refined analysis
  17. GRB 060717: Swift detection of a burst
  18. GRB 060714: Swift XRT refined analysis
  19. GRB060708: MARGE low resolution spectrum observations
  20. Swift-BAT trigger 219136 is not a GRB
  21. GRB060707 possible optical confirmation
  22. Swift trigger 219136 is probably not a GRB
  23. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  24. GRB 060712: XRT refined analysis
  25. GRB 060712: Swift/UVOT Upper Limits
  26. GRB 060712: XRT refined position
  27. GRB 060712: Refined analysis of the Swift-BAT burst
  28. GRB 060712: Swift detection of a burst
  29. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  30. GRB 060708: Swift-XRT refined analysis
  31. GCN 060708: Swift-UVOT Observations
  32. GRB 060708: Refined analysis of the Swift-BAT burst
  33. GCN 060707: Swift-UVOT observations
  34. GRB 060707: Swift-XRT refined analysis
  35. GRB 060708: Swift detection of a burst with an UVOT countpart
  36. GRB060707 possible optical confirmation
  37. GRB 060707: BOOTES-IR optical afterglow candidate
  38. GRB 060707: Refined analysis of the Swift-BAT burst
  39. GRB 060707: BOOTES-IR optical observation
  40. GRB060614: Possible SN Bump in UVOT U Band Light Curve
  41. GRB 060707: Swift detection of a burst
  42. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  43. GRB060614: Detection of the host galaxy but no supernova emission
  44. Swift-BAT trigger 215279 is not a GRB
  45. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  46. GRB 060614: pseudo-z from spectral parameters of the prompt emission
  47. Konus-Wind observation of GRB 060614
  48. The Unusually Long-Lived Afterglow of GRB 060614
  49. GRB 060605, optical observations
  50. GRB060614: SSO 1m observations
  51. GRB060614: Watcher observation
  52. GRB 060614: Swift-BAT refined analysis
  53. GRB 060614: Swift/UVOT Observations
  54. GRB060614: Swift-XRT refined analysis
  55. GRB 060604, optical observations
  56. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  57. GRB 060602A: Swift/XRT analysis
  58. BAT Trigger #214277 is SGR 1900+14
  59. GRB 060610: KAIT observations
  60. GRB 060607: RTT150 optical observations
  61. GRB 070706B: Watcher upper limit
  62. GRB 060607B: Swift-BAT Refined Analysis
  63. GRB060602A: Swift/UVOT upper limits
  64. GRB 060607B: Swift detection of a burst
  65. GCN 060607: Swift-UVOT obswervations.
  66. GRB 060607: Swift-BAT Refined Analysis
  67. GRB 060607: optical limit by "Pi of the Sky"
  68. GRB 060607: Swift-XRT Team refined analysis
  69. VLT/UVES observations of GRB 060607
  70. GRB 060605: RTT150 optical observations
  71. GRB 060607: Swift detection of a burst with bright optical counterpart
  72. GRB 060605 BAT refined analysis
  73. GRB060605: Swift/UVOT detections
  74. GRB 060605: Swift-XRT Team refined analysis
  75. GRB 060605: RTT150 optical observations
  76. GRB 060605: ROTSE-III Optical Counterpart
  77. GRB 060605: Swift detection of a burst with optical counterpart
  78. GRB 060605: ROTSE-III Detection of Optical Counterpart
  79. GRB060604: Swift/UVOT detections
  80. GRB 060604: redshift
  81. GRB 060604 optical photometry
  82. GRB 060604: Swift-XRT Team refined analysis
  83. GRB 060604: BAT refined analysis
  84. GRB 060604A: ROTSE-III Optical Limits
  85. GRB 060604: Swift detection of a burst with possible optical counterpart
  86. GRB 060602A: Swift-BAT Refined Analysis: Correction
  87. GRB 060602B: XMM-Newton Survey Source
  88. GRB 060602B: Swift-XRT Refined Analysis
  89. GRB 060602B: Swift-BAT Refined Analysis
  90. GRB 060602B: Swift/UVOT observations
  91. GRB 060602A: Swift-BAT Refined Analysis
  92. GRB 060602B: RTT150 optical observations
  93. GRB 060602B: Swift detection of a burst
  94. GRB060602 - SDSS Pre-Burst Observations
  95. GRB 060602: Swift detection of a burst
  96. GRB 060526: Break in X-ray light curve
  97. GRB 051227 : WIDGET simultaneous optical observations
  98. GRB 060526: Multiple Optical Flares
  99. GRB060502b: optical observations
  100. GRB 060526: Optical Flare

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