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"

37911 results found.

  1. GRB 060111B: Suzaku WAM observation of the prompt emission
  2. GRB 060124: Swift-BAT detection of a burst
  3. GRB 060116: Radio Detection
  4. GRB 060116: MARGE optical observations
  5. GRB 060121: Swift/UVOT upper limits
  6. GRB 060121: Liverpool Telescopes optical limits
  7. GRB 060121: Swift XRT refined analysis
  8. Konus-Wind observation of GRB 060121
  9. GRB 060121: I-band Limits
  10. GRB 060121: Confirmation of Afterglow
  11. GRB 060121: candidate optical counterpart
  12. GRB 060121: Swift XRT refined position
  13. GRB060121: SARA Observations
  14. GRB 060121: optical observations
  15. GRB 060121: Infrared Observations
  16. GRB 060121: optical observations
  17. GRB 060121: Optical imaging
  18. GRB060121 - SDSS pre-burst observations
  19. GRB 060121: A short-hard GRB in a cluster?
  20. GRB 060121 (=H4010): Results of preliminary spectral analysis
  21. GRB 060121: A bright short/hard GRB localized by HETE-2 SXC
  22. GRB 060121: A bright short/hard GRB localized by HETE-2 WXM
  23. HETE Alert 4006: MASTER promt optical limit
  24. GRB 060117: PROMPT Observations
  25. GRB060117 - ATCA 3/6cm radio limits - correction
  26. GRB060117 - ATCA 3/6cm radio limits
  27. GRB 060116: photometric redshift - the farthest GRB?
  28. GRB 060117: pseudo-z from spectral parameters of the prompt emission
  29. Correction to GCN 4542 on GRB 060117
  30. Konus-Wind observation of GRB 060117
  31. GRB 060116: possible I-J dropout
  32. GRB 060116: UKIRT IR Observations
  33. GRB 060117: Refined analysis of the Swift-BAT burst
  34. GRB 060116: PROMPT Observations
  35. GRB 060117: FRAM refined analysis
  36. GRB 060117: FRAM optical afterglow candidate
  37. GRB 060117: nearby galaxy
  38. GRB 060117: Swift-BAT detection of a bright burst
  39. GRB 060116: VLT optical observations
  40. GRB 060116: Refined analysis of the Swift-BAT burst
  41. GRB 060115: PROMPT Observations
  42. GRB 060116: XRT refined analysis
  43. GRB 060116: IR Candidate Afterglow
  44. GRB 060116: Swift/UVOT upper limits
  45. GRB060115: REM observations
  46. GRB 060110: XRT position and analysis
  47. GRB 060116 : Lulin optical limit
  48. GRB 060116: ROTSE-III Optical Limits
  49. GRB060116: XRT position
  50. GRB060116: Faulkes North observation
  51. GRB 060115: absorption redshift
  52. GRB 060116: Swift-BAT detection of a burst
  53. GRB 060115: Refined analysis of the Swift-BAT burst
  54. GRB 060115: OT photometry with MITSuME
  55. GRB 060115: Swift/UVOT upper limits
  56. GRB 060114: REM observations
  57. GRB 060115: Swift XRT refined analysis
  58. GRB 060115: OT finding chart
  59. GRB 060114: Swift/UVOT Observations
  60. GRB 060115: MITSuME optical afterglow candidate
  61. GRB 060115: Swift detection of a burst
  62. GRB 060114: Swift XRT upper limit
  63. GRB 060114: refined position
  64. GRB 060114: A long GRB detected by INTEGRAL
  65. GRB060114: Faulkes North observation
  66. GRB 060108: IR observations of afterglow
  67. GRB060108: Faulkes North afterglow evidence
  68. GRB 060108: further analysis of VLT images
  69. GRB 060108: Evidence for an XRT Position Offset
  70. GRB 060110: KAIT observations
  71. GRB 060111B: Swift XRT refined analysis
  72. GRB 060111A: refined UVOT anaysis
  73. GRB 060111B: MITSuME detection of optical afterglow
  74. GRB 060111B: TAROT optical observation
  75. GRB060111A: RTT150 optical observations
  76. GRB060111B: RTT150, possible host galaxy
  77. GRB 060111B: Refined analysis of the Swift-BAT burst
  78. GRB 060110: MARGE observations
  79. GRB 060111(a): P60 Observations
  80. GRB 060111B: Gualba observatory limit
  81. GRB 060111B: ROTSE-III Detection of Optical Counterpart Flare
  82. GRB 060111B: Swift detection of a burst
  83. GRB 060111: Swift-BAT Refined Analysis
  84. GRB060111.2:_MASTER optical limit
  85. GRB 060108: VLT K-band observations
  86. GRB 060111: TAROT optical observation
  87. GRB 060111: possible UVOT counterpart
  88. GRB060111 : XRT refined analysis
  89. GRB 060111: ROTSE-III Optical Limits
  90. GRB 060111: Swift detection of a burst
  91. GRB 060110: Mitsume optical observations
  92. GRB 060110: Swift-BAT refined analysis
  93. GRB 060109: Swift-BAT refined analysis
  94. GRB 060108: z-band imaging from Gemini-North
  95. GRB 060110a: RAPTOR detection of early optical emission.
  96. GRB 060110: UKIRT K-band observations
  97. GRB 060110: ROTSE-III Confirmation of Optical Counterpart
  98. GRB 060110: IR Candidate Afterglow
  99. GRB 060110: Super-LOTIS observations
  100. GRB 060110: Optical observation

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