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"

28230 results found.

  1. GCN 060708: Swift-UVOT Observations
  2. GRB 060708: Refined analysis of the Swift-BAT burst
  3. GCN 060707: Swift-UVOT observations
  4. GRB 060707: Swift-XRT refined analysis
  5. GRB 060708: Swift detection of a burst with an UVOT countpart
  6. GRB 060707: Refined analysis of the Swift-BAT burst
  7. GRB 060707: BOOTES-IR optical observation
  8. GRB 060515: Upper Limit on Host Galaxy
  9. GRB 060614: SMARTS host galaxy observations
  10. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  11. GRB 060109: Upper Limit on Host Galaxy
  12. GRB 060105: Upper limit on Host Galaxy
  13. GRB 060614: Redshift
  14. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  15. GRB050326: Host Galaxy Candidates
  16. GRB050124: Possible Host Galaxy
  17. GRB050223: Host Galaxy
  18. Konus-Wind observation of GRB 060614
  19. GRB060605: optical observation
  20. GRB 060614: optical observations
  21. GRB 060605, optical observations
  22. GRB 060614: Swift-BAT refined analysis
  23. GRB 060614: Swift/UVOT Observations
  24. GRB060614: Swift-XRT refined analysis
  25. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  26. GRB 060602A: Swift/XRT analysis
  27. BAT Trigger #214277 is SGR 1900+14
  28. GRB 060610: KAIT observations
  29. GRB 060607: RTT150 optical observations
  30. GRB 060607B: Swift-BAT Refined Analysis
  31. GRB060602A: Swift/UVOT upper limits
  32. GRB 060607B: Swift detection of a burst
  33. GCN 060607: Swift-UVOT obswervations.
  34. GRB 060607: Swift-BAT Refined Analysis
  35. GRB 060607: Swift-XRT Team refined analysis
  36. GRB 060607: IR observations
  37. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  38. GRB 060605: RTT150 optical observations
  39. GRB 060607: REM NIR afterglow
  40. GRB 060607: Swift detection of a burst with bright optical counterpart
  41. GRB 060522: PROMPT Optical Limits
  42. GRB 060605 BAT refined analysis
  43. GRB 060605: Xinglong TNT optical observations
  44. GRB060602B : REM infrared observations
  45. GRB060605: Swift/UVOT detections
  46. GRB 060605: Swift-XRT Team refined analysis
  47. GRB 060605: RTT150 optical observations
  48. GRB 060605: Swift detection of a burst with optical counterpart
  49. GRB060604: Swift/UVOT detections
  50. GRB 060604: Swift-XRT Team refined analysis
  51. GRB 060604: BAT refined analysis
  52. GRB 060604A: ROTSE-III Optical Limits
  53. GRB 060604: Swift detection of a burst with possible optical counterpart
  54. GRB 060602A: Swift-BAT Refined Analysis: Correction
  55. GRB 060602B: Swift-XRT Refined Analysis
  56. GRB 060602B: Swift-BAT Refined Analysis
  57. GRB 060602B: Swift/UVOT observations
  58. GRB 060602A: Swift-BAT Refined Analysis
  59. GRB 060211A : WIDGET simultaneous optical observations
  60. GRB060602A: optical observations(/transient?)
  61. GRB 060602B: Swift detection of a burst
  62. GRB060602B: BOOTES-IR candidate afterglow
  63. GRB060602 - SDSS Pre-Burst Observations
  64. GRB 060502A: Optical afterglow observations
  65. GRB 060526: Break in X-ray light curve
  66. GRB060526, optical observations
  67. GRB 051227 : WIDGET simultaneous optical observations
  68. GRB 051028 : WIDGET pre-trigger limit
  69. GRB060526: Optical counterpart from MIRO
  70. GRB 060526: RTT150 optical observations
  71. GRB060526: optical observations
  72. GRB 060526: REM observations
  73. GRB 060526: RTT150 optical observations, afterglow flattening
  74. GRB 060526: MDM-2.4m Observations
  75. GRB 060526: Refined analysis of the Swift-BAT burst
  76. GRB 060526: RTT150 optical observations
  77. GRB060526, optical observations
  78. GRB 060526: Swift/XRT Team refined analysis
  79. GRB 060526: ROTSE-III Observations of Optical Counterpart
  80. GRB 060526: Watcher Observations
  81. GRB060526 - SDSS Pre-burst Observations
  82. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  83. GRB 060413 : WIDGET simultaneous optical observations
  84. XMM-Newton observation of GRB060510b
  85. GRB060512: Late-Time P200 Observations
  86. GRB 060522: Swift-BAT Refined Analysis
  87. GRB 060522: REM NIR observations
  88. GRB 060522: TNG optical observations
  89. GRB 060515: NIR observation
  90. GRB 060210: Jet Break in the XRT light curve
  91. GRB 060516: Refined analysis of the Swift-BAT burst
  92. GRB060515: P200 NIR Observations
  93. GRB 060505 BAT refined analysis
  94. GRB 060515 BAT refined analysis
  95. GRB 060512: TAROT optical observation
  96. GRB 060515: Swift/XRT Team refined analysis
  97. GRB 060515: Swift/UVOT Upper Limits
  98. GRB 060515: Swift/XRT position
  99. GRB 060515: Super-LOTIS Observations
  100. GRB 060515: TAROT 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