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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"

24435 results found.

  1. GRB 060912B: a long GRB detected with INTEGRAL
  2. GRB 060912: Swift XRT Team Refined Analysis
  3. GRB 060912, Swift-BAT refined analysis
  4. GRB 060908, Swift-BAT refined analysis
  5. GRB 060904A : Optical limit
  6. GRB 060908: REM optical prompt observation
  7. GRB 060908: PROMPT Detection of a Bright Counterpart
  8. GRB 060904A: Suzaku/WAM observation of the prompt emission
  9. GRB060904b optical detections (delayed report due to internet outage)
  10. GRB 060906, Swift-BAT refined spectral analysis
  11. GRB 060906: Swift/XRT Refined Analysis
  12. VLT redshift of GRB 060906
  13. GRB 060906: observations with FRAM
  14. GRB 060906: Swift detection of a probable burst
  15. GRB 060904b: SMARTS optical/IR afterglow observations
  16. GRB 060904A: Subaru NIR observation
  17. GRB 060904A: pseudo-z from spectral parameters of the prompt emission
  18. GRB 060904B: Swift-BAT refined analysis
  19. GRB 060904B: Swift-XRT refined analysis
  20. GRB 060904A: Refined analysis of the Swift-BAT burst
  21. GRB 060904A: Swift-XRT refined analysis
  22. GRB 060904B: VLT redshift
  23. GRB 060904B: ROTSE-III Detection of Optical Counterpart
  24. Konus-Wind observation of GRB 060901
  25. GRB 060901: Swift/XRT Refined Analysis
  26. GRB 060901: SMARTS optical/IR observations
  27. GRB 060901: further INTEGRAL results
  28. GRB 060901: a long GRB detected by INTEGRAL
  29. Two bright bursts from SGR 1806-20 detected with IBAS
  30. GRB 060814: Suzaku/WAM observation of the prompt emission
  31. GRB 060825: XRT Team Refined Analysis
  32. GRB 060825: Swift-BAT Refined Analysis
  33. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  34. GRB060825: Liverpool Telescope optical observations
  35. GRB060729: analysis of XMM-Newton observation
  36. GRB 060814: pseudo-z from spectral parameters of the prompt
  37. IBAS Alerts No 3429 and 3430: not GRBs
  38. GRB 060729, SMARTS optical/IR observations
  39. GRB 060813: A long, bright GRB detected with Suzaku WAM
  40. GRB 060814: Refined analysis of the Swift-BAT burst
  41. GRB 060814: P60 Observations
  42. GRB060814: Swift/UVOT upper limits
  43. GRB 060814: VLT optical limits
  44. Konus-Wind observation of GRB 060813
  45. GRB060813: Swift/UVOT upper limits
  46. GRB 060813: Swift XRT refined analysis
  47. GRB 060813: Refined analysis of the Swift-BAT burst
  48. GRB051109B: Late-time Radio Observations
  49. A dust-scattering halo detected around SGR 1806-20
  50. Swift detection of an outburst from the 4U 1246-58 LMXB burster
  51. GRB060807: Possible Highly Significant X-ray Emission Lines
  52. GRB060714: optical observations
  53. IBAS Alert n. 3422: not a GRB
  54. GRB060717: optical observations
  55. GRB 060805B: XRT Team Analysis
  56. GRB060806 is similar to previous activity of SGR1806-20
  57. GRB 060807: UVOT Upper limits
  58. GRB 060807: afterglow confirmation
  59. GRB 060807: XRT Team refined analysis
  60. GRB 060807: K- and R-band observations
  61. GRB 060807: Refined analysis of the Swift-BAT burst
  62. GRB 060805B: RHESSI Spectral Fit
  63. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  64. GRB060805 Liverpool Telescope observations
  65. GRB 060805: Swift-BAT Refined Analysis
  66. GRB 060805: Swift/UVOT Upper Limits
  67. GRB 060805: Swift detection of a burst
  68. GRB 060804: Swift UVOT observations
  69. GRB 060804: Refined analysis of the Swift-BAT burst
  70. GRB 060801: no variability of optical sources
  71. IBAS Alert 3418: not a GRB
  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: Swift detection of a short burst
  77. IBAS Alert n. 3415: not a GRB
  78. GRB 060729 redshift
  79. GRB 060729: Refined analysis of the Swift-BAT burst
  80. GRB 060729: Swift-XRT refined analysis
  81. GRB 060729: ROTSE-III Detection of Optical Counterpart
  82. GRB 060728: Swift/UVOT Upper Limits
  83. GRB 060728: Refined analysis of the Swift-BAT burst
  84. GRB 060728, SMARTS optical/IR observations
  85. GRB060719: prompt NIR observations with REM
  86. GRB 060719: near-infrared afterglow
  87. GRB 060719: Swift/UVOT Upper Limits
  88. GRB 060719: Refined analysis of the Swift-BAT burst
  89. GRB 060719: further analysis of VLT observations
  90. GRB060719: FRAM early follow-up limit
  91. GRB 060719: prompt PROMPT observations
  92. GRB 060714: Refined analysis of the Swift-BAT burst
  93. GRB060717: Swift/UVOT upper limits
  94. GRB 060717: Swift-BAT refined analysis
  95. GRB 060714: REM infrared observations
  96. GRB 060717: Swift detection of a burst
  97. GRB 060714, SMARTS optical/IR afterglow observation
  98. GRB 060605: SkyNet Optical Limits
  99. GRB 060712: XRT refined analysis
  100. GRB 060712: Swift/UVOT Upper Limits

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