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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"

26559 results found.

  1. GRB 060814: P200 NIR Observations
  2. GRB060805B: optical observations
  3. GRB 060813: pseudo-z from spectral parameters of the prompt
  4. GRB 060814: Swift XRT refined analysis
  5. GRB 060814 - SDSS Pre-Burst Observations
  6. GRB 060814: TAROT optical observations
  7. Konus-Wind observation of GRB 060813
  8. GRB 060813: Refined analysis of the Swift-BAT burst
  9. GRB051109B: Late-time Radio Observations
  10. Second VLA limit on new radio point source in SGR 1806-20
  11. GRB 060805B: pseudo-z from spectral parameters of the prompt emission
  12. GRB060807: Possible Highly Significant X-ray Emission Lines
  13. GRB 060729: An update on the Swift XRT and UVOT observations
  14. GRB060807: Optical limiting magnitudes
  15. GRB 060805B: optical observation at Sierra Nevada
  16. GRB 060805B: XRT Team Analysis
  17. VLA Upper Limit on Outburst of SGR 1806-20
  18. GRB060806 is similar to previous activity of SGR1806-20
  19. GRB 060807: UVOT Upper limits
  20. GRB 060807: afterglow confirmation
  21. GRB 060807: XRT Team refined analysis
  22. GRB 060807: K- and R-band observations
  23. GRB 060807: Refined analysis of the Swift-BAT burst
  24. IPN triangulation of GRB060806 (long, exceptionally bright)
  25. GRB060807 - SDSS Pre-burst Observations
  26. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  27. GRB 060805B: Swift/UVOT Upper Limits
  28. GRB 060805: XRT Team Refined Analysis
  29. GRB 060805: Swift-BAT Refined Analysis
  30. GRB 060805 - SDSS Pre-Burst Observations
  31. GRB 060804: Swift UVOT observations
  32. GRB 060804: Refined analysis of the Swift-BAT burst
  33. GRB 060728: Upper limits of the X-ray emission
  34. GRB 060801: no variability of optical sources
  35. GRB060801: Radio Observations
  36. GRB060801: Swift/UVOT Upper Limits
  37. GRB 060801: optical observations at Hanle and Calar Alto
  38. GRB 060801: Swift XRT refined analysis
  39. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  40. GRB 060801, optical observation
  41. GRB060729: ROTSE-III Observations of the Slow Optical Decay
  42. GRB 060719: TORTOREM optical upper limits
  43. GRB 060729: Refined analysis of the Swift-BAT burst
  44. GRB 060729: Swift-XRT refined analysis
  45. GRB 060729: Swift/UVOT Observations
  46. GRB 060728: Refined analysis of the Swift-BAT burst
  47. GRB060614 ATCA Radio Limits
  48. GRB060719: prompt NIR observations with REM
  49. GRB 060719: near-infrared afterglow
  50. GRB 060522: VLA observation
  51. GRB 060719: VLT/ISAAC observations
  52. GRB 060719: Refined analysis of the Swift-BAT burst
  53. GRB 060719: further analysis of VLT observations
  54. GRB 060719: optical limit by Pi-of-the-Sky
  55. GRB060719: FRAM early follow-up limit
  56. GRB 060719: prompt PROMPT observations
  57. GRB060719: REM NIR Observations
  58. GRB 060719: Continued LCO optical observations
  59. GRB 060717: NOT observations
  60. GRB 060714: Refined analysis of the Swift-BAT burst
  61. GRB 060717: Swift-BAT refined analysis
  62. GRB060717 - SDSS Pre-burst Observations
  63. GRB 060714: REM infrared observations
  64. GRB 060714, SMARTS optical/IR afterglow observation
  65. GRB 060714 : Liverpool Telescope Observations
  66. GRB 060714, optical observation
  67. GRB 060712: XRT refined analysis
  68. GRB 060712: Refined analysis of the Swift-BAT burst
  69. GRB060712: MASTER optical observation
  70. GRB120706: MASTER optical observation
  71. GRB 060707: OA fading and redshift
  72. GRB 060708: Swift-XRT refined analysis
  73. GRB 060708: Refined analysis of the Swift-BAT burst
  74. GCN 060707: Swift-UVOT observations
  75. GRB 060707: Swift-XRT refined analysis
  76. GRB 060707: Refined analysis of the Swift-BAT burst
  77. GRB 060614: SMARTS host galaxy observations
  78. GRB 060105: Upper limit on Host Galaxy
  79. GRB060614: Detection of the host galaxy but no supernova emission
  80. GRB 060614: redshift confirmation
  81. GRB 060614: spectroscopy
  82. GRB 060614: pseudo-z from spectral parameters of the prompt emission
  83. Konus-Wind observation of GRB 060614
  84. The Unusually Long-Lived Afterglow of GRB 060614
  85. GRB 060614: optical observations
  86. GRB 060605, optical observations
  87. GRB060614: Watcher observation
  88. GRB 060614: Swift-BAT refined analysis
  89. GRB060614: Swift-XRT refined analysis
  90. GRB 060604, optical observations
  91. GRB 060602A: Swift/XRT analysis
  92. GRB 060607B: Swift-BAT Refined Analysis
  93. GRB060602A: Swift/UVOT upper limits
  94. GRB 060607B: Swift detection of a burst
  95. GRB 060607: Swift-BAT Refined Analysis
  96. GRB 060607: optical limit by "Pi of the Sky"
  97. GRB 060607: Swift-XRT Team refined analysis
  98. GRB 060607: PROMPT Observations
  99. GRB 060605 BAT refined analysis
  100. GRB 060605: Swift-XRT Team refined analysis

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