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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"

28253 results found.

  1. GRB060901: Optical observations
  2. 060901: Swift UVOT followup observations
  3. GRB 060901: Swift/XRT Refined Analysis
  4. GRB 060901: Swift/XRT Position
  5. GRB 060901: a long GRB detected by INTEGRAL
  6. Two bright bursts from SGR 1806-20 detected with IBAS
  7. GRB 060605, observations using an Integral Field Unit
  8. GRB 060604: VLA Observation
  9. GRB 060814: Suzaku/WAM observation of the prompt emission
  10. GRB 060605: VLA Observation
  11. GRB 060707: VLA observation
  12. GRB 060825: VLA observations
  13. GRB060826 - SDSS Pre-Burst Observations
  14. GRB 060826(?): Swift detection of a possible burst
  15. GRB 060825: XRT Team Refined Analysis
  16. GRB 060825: Swift-BAT Refined Analysis
  17. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  18. GRB 060825: TNG optical observations
  19. GRB 060825: TAROT optical observations
  20. GRB 060825: P60 Observations
  21. GRB 060825: Swift detection of a burst
  22. GRB060801: host galaxy redshift
  23. GRB060729: analysis of XMM-Newton observation
  24. GRB 060729, SMARTS optical/IR observations
  25. GRB 060813: A long, bright GRB detected with Suzaku WAM
  26. Konus-Wind observation of GRB 060814
  27. GRB 060814: Refined analysis of the Swift-BAT burst
  28. GRB 060814: P60 Observations
  29. GRB 060814: P200 NIR Observations
  30. GRB060805B: optical observations
  31. GRB 060814: Swift XRT refined analysis
  32. GRB 060814: VLT optical limits
  33. GRB 060814 - SDSS Pre-Burst Observations
  34. GRB 060814: TAROT optical observations
  35. GRB 060814: Swift detection of a bright burst
  36. Konus-Wind observation of GRB 060813
  37. GRB 060813: Swift XRT refined analysis
  38. GRB 060813: Refined analysis of the Swift-BAT burst
  39. GRB 060813: Swift detection of a burst
  40. GRB051109B: Late-time Radio Observations
  41. Swift detection of an outburst from the 4U 1246-58 LMXB burster
  42. GRB060807: Possible Highly Significant X-ray Emission Lines
  43. GRB 060729: An update on the Swift XRT and UVOT observations
  44. GRB060717: optical observations
  45. GRB060807: Optical limiting magnitudes
  46. GRB 060805B: XRT Team Analysis
  47. GRB060806 is similar to previous activity of SGR1806-20
  48. GRB 060807: XRT Team refined analysis
  49. GRB 060807: Refined analysis of the Swift-BAT burst
  50. GRB060807: optical afterglow candidate
  51. IPN triangulation of GRB060806 (long, exceptionally bright)
  52. GRB060807 - SDSS Pre-burst Observations
  53. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  54. GRB 060805B: Swift/UVOT Upper Limits
  55. GRB 060807, optical observation
  56. GRB 060807: Kanazawa R-band observation
  57. GRB 060807: Swift detection of a burst
  58. GRB060805 Liverpool Telescope observations
  59. GRB 060805: XRT Team Refined Analysis
  60. GRB 060805: Swift-BAT Refined Analysis
  61. GRB 060805: Swift/UVOT Upper Limits
  62. GRB 060805: P60 Observations
  63. GRB 060805 - SDSS Pre-Burst Observations
  64. GRB 060804: Swift UVOT observations
  65. GRB 060804: Swift-XRT Team Refined Analysis
  66. GRB 060804: Refined analysis of the Swift-BAT burst
  67. GRB 060804: Swift detection of a burst with a possible UVOT counterpart
  68. GRB 060728: Upper limits of the X-ray emission
  69. GRB 060801: no variability of optical sources
  70. GRB 060801: XRT/SDSS Frame Offset and Refined XRT Position
  71. GRB060801: Radio Observations
  72. GRB 051109B: Bright spiral host galaxy at low redshift
  73. GRB060801: Swift/UVOT Upper Limits
  74. GRB 060801: optical observations at Hanle and Calar Alto
  75. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  76. GRB 060801, optical observation
  77. GRB 060801: Kanazawa Optical Observation
  78. GRB 060719: TORTOREM optical upper limits
  79. GRB 060729: Refined analysis of the Swift-BAT burst
  80. GRB 060729: Swift-XRT refined analysis
  81. GRB 060729: Swift/UVOT Observations
  82. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  83. GRB 060728: Swift/UVOT Upper Limits
  84. GRB 060728, SMARTS optical/IR observations
  85. Swift/XRT preliminary analysis
  86. GRB 060728: Swift detection of a burst
  87. GRB 060714: Swift/UVOT Observations
  88. GRB060719: prompt NIR observations with REM
  89. GRB 060714: NOT observations
  90. GRB 060719: near-infrared afterglow
  91. GRB 060719: correction to the coordinates reported in GCN 5347
  92. GRB 060522: VLA observation
  93. GRB 060719: Swift/UVOT Upper Limits
  94. GRB 060719: VLT/ISAAC observations
  95. GRB 060719: Refined analysis of the Swift-BAT burst
  96. GRB 060719: XRT refined analysis
  97. GRB 060719: further analysis of VLT observations
  98. GRB060719: REM NIR Observations
  99. GRB 060719: VLT observations
  100. GRB 060719: LCO optical observations

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