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"

19623 results found.

  1. GRB 060614: Swift/UVOT Observations
  2. GRB060614: Swift-XRT refined analysis
  3. GRB 060604, optical observations
  4. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  5. GRB 060602A: Swift/XRT analysis
  6. BAT Trigger #214277 is SGR 1900+14
  7. GRB 060610: KAIT observations
  8. GRB 060607: RTT150 optical observations
  9. GRB 070706B: Watcher upper limit
  10. GRB 060607B: Swift-BAT Refined Analysis
  11. GRB060602A: Swift/UVOT upper limits
  12. GRB 060607B: Swift detection of a burst
  13. GCN 060607: Swift-UVOT obswervations.
  14. GRB 060607: Swift-BAT Refined Analysis
  15. GRB 060607: optical limit by "Pi of the Sky"
  16. GRB 060607: Swift-XRT Team refined analysis
  17. VLT/UVES observations of GRB 060607
  18. GRB 060605: RTT150 optical observations
  19. GRB 060607: Swift detection of a burst with bright optical counterpart
  20. GRB 060605 BAT refined analysis
  21. GRB060605: Swift/UVOT detections
  22. GRB 060605: Swift-XRT Team refined analysis
  23. GRB 060605: RTT150 optical observations
  24. GRB 060605: ROTSE-III Optical Counterpart
  25. GRB 060605: Swift detection of a burst with optical counterpart
  26. GRB 060605: ROTSE-III Detection of Optical Counterpart
  27. GRB060604: Swift/UVOT detections
  28. GRB 060604: redshift
  29. GRB 060604 optical photometry
  30. GRB 060604: Swift-XRT Team refined analysis
  31. GRB 060604: BAT refined analysis
  32. GRB 060604A: ROTSE-III Optical Limits
  33. GRB 060604: Swift detection of a burst with possible optical counterpart
  34. GRB 060602A: Swift-BAT Refined Analysis: Correction
  35. GRB 060602B: XMM-Newton Survey Source
  36. GRB 060602B: Swift-XRT Refined Analysis
  37. GRB 060602B: Swift-BAT Refined Analysis
  38. GRB 060602B: Swift/UVOT observations
  39. GRB 060602A: Swift-BAT Refined Analysis
  40. GRB 060602B: RTT150 optical observations
  41. GRB 060602B: Swift detection of a burst
  42. GRB060602 - SDSS Pre-Burst Observations
  43. GRB 060602: Swift detection of a burst
  44. GRB 060526: Break in X-ray light curve
  45. GRB 051227 : WIDGET simultaneous optical observations
  46. GRB 060526: Multiple Optical Flares
  47. GRB060502b: optical observations
  48. GRB 060526: Optical Flare
  49. GRB 060526: Refined analysis of the Swift-BAT burst
  50. GRB 060526: RTT150 optical observations
  51. GRB060526: Further Swift-UVOT Observations
  52. GRB 060526: Swift/XRT Team refined analysis
  53. GRB 060526: ROTSE-III Observations of Optical Counterpart
  54. GRB 060526: Watcher Observations
  55. GRB 060526: Continued emission for the Swift burst
  56. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  57. GRB 060413 : WIDGET simultaneous optical observations
  58. GRB 060522: Swift/UVOT Observations: Correction
  59. GRB 060522: Swift/UVOT Observations of the Optical Afterglow
  60. XMM-Newton observation of GRB060510b
  61. GRB 060522: Swift/XRT Team refined analysis
  62. GRB 060522: Swift-BAT Refined Analysis
  63. GRB 060522: Swift detection of a burst with possible optical afterglow
  64. GRB 060210: Jet Break in the XRT light curve
  65. GRB 060516: Refined analysis of the Swift-BAT burst
  66. GRB 060516: Swift detection of a burst
  67. GRB 060505 BAT refined analysis
  68. GRB 060515 BAT refined analysis
  69. GRB 060512: TAROT optical observation
  70. GRB 060515: Swift/XRT Team refined analysis
  71. GRB 060515: Swift/UVOT Upper Limits
  72. GRB 060515: Swift/XRT position
  73. GRB 060515: Super-LOTIS Observations
  74. GRB060515: Swift/UVOT initial observation
  75. GRB 060515: TAROT optical observation
  76. GRB 060515: ROTSE-III Optical Limits
  77. GRB 060515: Swift detection of a burst
  78. Swift/UVOT observations of GRB060512.
  79. GRB060512: Swift XRT Team refined analysis
  80. GRB 060512: Detection of NIR afterglow
  81. GRB 060512: Swift-BAT Refined Analysis
  82. GRB060512 Name Correction: LT Afterglow detection
  83. GRB060512: Liverpool Telescope Afterglow detection
  84. GRB 060512: Swift detection of a burst with an optical afterglow
  85. GRB 060510A: Swift/UVOT Detection of an Optical Afterglow
  86. GRB 060505: X-ray afterglow - Correction -
  87. GRB 060505: X-ray afterglow
  88. Konus-Wind observation of GRB 060510A
  89. GRB 060428a, SMARTS optical/IR afterglow detection
  90. GRB060510B: Swift XRT refined analysis
  91. GRB 060510B: Swift/UVOT Upper Limits
  92. GRB 060510A: Refined analysis of the Swift-BAT burst
  93. GRB 060510B: Swift-BAT Refined Analysis
  94. GRB060510A: XRT refined analysis
  95. GRB 060510B: Super-LOTIS Observations
  96. GRB 060510B: MDM Observations and candidate OT
  97. GRB 060510B: Swift detection of a burst
  98. GRB 060510: Swift detection of a burst with optical transient
  99. GRB060502B: improvement in the XRT afterglow position
  100. GRB 060507: BART limit

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