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"

29092 results found.

  1. GRB060719: prompt NIR observations with REM
  2. GRB 060719: Swift/UVOT Upper Limits
  3. GRB 060719: VLT/ISAAC observations
  4. GRB 060719: Refined analysis of the Swift-BAT burst
  5. GRB 060719: XRT refined analysis
  6. GRB 060719: further analysis of VLT observations
  7. GRB 060719: optical limit by Pi-of-the-Sky
  8. GRB060719: FRAM early follow-up limit
  9. GRB060719: REM NIR Observations
  10. GRB 060719: Swift detection of a burst
  11. GRB 060714: Refined analysis of the Swift-BAT burst
  12. GRB060717: Swift/UVOT upper limits
  13. GRB 060717: Swift XRT refined position
  14. GRB 060717: Swift-BAT refined analysis
  15. GRB 060714: REM infrared observations
  16. GRB 060717: Swift detection of a burst
  17. GRB 060714: Swift XRT refined analysis
  18. GRB060708: MARGE low resolution spectrum observations
  19. Swift-BAT trigger 219136 is not a GRB
  20. Swift trigger 219136 is probably not a GRB
  21. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  22. GRB 060605: SkyNet Optical Limits
  23. GRB 060712: XRT refined analysis
  24. GRB 060712: Swift/UVOT Upper Limits
  25. GRB 060712: XRT refined position
  26. GRB 060712: Refined analysis of the Swift-BAT burst
  27. GRB 060712: Swift detection of a burst
  28. GRB 060708: Swift-XRT refined analysis
  29. GCN 060708: Swift-UVOT Observations
  30. GRB 060708: Refined analysis of the Swift-BAT burst
  31. GCN 060707: Swift-UVOT observations
  32. GRB 060707: Swift-XRT refined analysis
  33. GRB 060708: Swift detection of a burst with an UVOT countpart
  34. GRB 060707: Refined analysis of the Swift-BAT burst
  35. GRB 060707: Swift detection of a burst
  36. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  37. Swift-BAT trigger 215279 is not a GRB
  38. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  39. Konus-Wind observation of GRB 060614
  40. The Unusually Long-Lived Afterglow of GRB 060614
  41. GRB060614: SSO 1m observations
  42. GRB 060614: Swift-BAT refined analysis
  43. GRB 060614: Swift/UVOT Observations
  44. GRB060614: Swift-XRT refined analysis
  45. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  46. GRB 060602A: Swift/XRT analysis
  47. BAT Trigger #214277 is SGR 1900+14
  48. GRB 060610: KAIT observations
  49. GRB 060607: RTT150 optical observations
  50. GRB 060607B: Swift-BAT Refined Analysis
  51. GRB060602A: Swift/UVOT upper limits
  52. GRB 060607B: Swift detection of a burst
  53. GCN 060607: Swift-UVOT obswervations.
  54. GRB 060607: Swift-BAT Refined Analysis
  55. GRB 060607: optical limit by "Pi of the Sky"
  56. GRB 060607: Swift-XRT Team refined analysis
  57. GRB 060607: IR observations
  58. VLT/UVES observations of GRB 060607
  59. GRB 060607: PROMPT Observations
  60. GRB 060605: RTT150 optical observations
  61. GRB 060607: Swift detection of a burst with bright optical counterpart
  62. GRB 060605 BAT refined analysis
  63. GRB060605: Swift/UVOT detections
  64. GRB 060605: Swift-XRT Team refined analysis
  65. GRB 060605: RTT150 optical observations
  66. GRB 060605: Swift detection of a burst with optical counterpart
  67. GRB 060605: ROTSE-III Detection of Optical Counterpart
  68. GRB060604: Swift/UVOT detections
  69. GRB 060604: Swift-XRT Team refined analysis
  70. GRB 060604: BAT refined analysis
  71. GRB 060604A: ROTSE-III Optical Limits
  72. GRB 060604: Swift detection of a burst with possible optical counterpart
  73. GRB 060602B: XMM-Newton Survey Source
  74. GRB 060602B: Swift-XRT Refined Analysis
  75. GRB 060602B: Swift-BAT Refined Analysis
  76. GRB 060602B: Swift/UVOT observations
  77. GRB 060602A: Swift-BAT Refined Analysis
  78. GRB 060602B: RTT150 optical observations
  79. GRB 060602B: Swift detection of a burst
  80. GRB060602B: Watcher observations - no OT candidate
  81. GRB060602B: BOOTES-IR candidate afterglow
  82. GRB060602 - SDSS Pre-Burst Observations
  83. GRB 060602: Swift detection of a burst
  84. GRB 060526: Break in X-ray light curve
  85. GRB 051227 : WIDGET simultaneous optical observations
  86. GRB 051028 : WIDGET pre-trigger limit
  87. GRB060502b: optical observations
  88. GRB 060526: REM observations
  89. GRB 060526: Refined analysis of the Swift-BAT burst
  90. GRB 060526: RTT150 optical observations
  91. GRB060526: Further Swift-UVOT Observations
  92. GRB 060526: ROTSE-III Observations of Optical Counterpart
  93. GRB 060526: Watcher Observations
  94. GRB 060526: Continued emission for the Swift burst
  95. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  96. GRB 060522: Swift/UVOT Observations of the Optical Afterglow
  97. XMM-Newton observation of GRB060510b
  98. GRB 060522: Swift/XRT Team refined analysis
  99. GRB 060522: Swift-BAT Refined Analysis
  100. GRB 060522: Swift detection of a burst with possible optical afterglow

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