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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"

24436 results found.

  1. IBAS Alert No.3468: not a GRB
  2. GRB 060912B: a long GRB detected with INTEGRAL
  3. GRB 060912: Swift XRT Team Refined Analysis
  4. GRB 060912, Swift-BAT refined analysis
  5. GRB 060908, Swift-BAT refined analysis
  6. GRB 060904A : Optical limit
  7. GRB 060908: REM optical prompt observation
  8. GRB 060908: PROMPT Detection of a Bright Counterpart
  9. GRB 060904A: Suzaku/WAM observation of the prompt emission
  10. GRB060904b optical detections (delayed report due to internet outage)
  11. GRB 060906, Swift-BAT refined spectral analysis
  12. GRB 060906: Swift/XRT Refined Analysis
  13. VLT redshift of GRB 060906
  14. GRB 060906: observations with FRAM
  15. GRB 060906: Swift detection of a probable burst
  16. GRB 060904b: SMARTS optical/IR afterglow observations
  17. GRB 060904A: Subaru NIR observation
  18. GRB 060904A: pseudo-z from spectral parameters of the prompt emission
  19. GRB 060904B: Swift-BAT refined analysis
  20. GRB 060904B: Swift-XRT refined analysis
  21. GRB 060904A: Refined analysis of the Swift-BAT burst
  22. GRB 060904A: Swift-XRT refined analysis
  23. GRB 060904B: VLT redshift
  24. GRB 060904B: ROTSE-III Detection of Optical Counterpart
  25. Konus-Wind observation of GRB 060901
  26. GRB 060901: Swift/XRT Refined Analysis
  27. GRB 060901: SMARTS optical/IR observations
  28. GRB 060901: further INTEGRAL results
  29. GRB 060901: a long GRB detected by INTEGRAL
  30. Two bright bursts from SGR 1806-20 detected with IBAS
  31. GRB 060814: Suzaku/WAM observation of the prompt emission
  32. GRB 060825: XRT Team Refined Analysis
  33. GRB 060825: Swift-BAT Refined Analysis
  34. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  35. GRB060825: Liverpool Telescope optical observations
  36. GRB060729: analysis of XMM-Newton observation
  37. GRB 060814: pseudo-z from spectral parameters of the prompt
  38. IBAS Alerts No 3429 and 3430: not GRBs
  39. GRB 060729, SMARTS optical/IR observations
  40. GRB 060813: A long, bright GRB detected with Suzaku WAM
  41. GRB 060814: Refined analysis of the Swift-BAT burst
  42. GRB 060814: P60 Observations
  43. GRB060814: Swift/UVOT upper limits
  44. GRB 060814: VLT optical limits
  45. Konus-Wind observation of GRB 060813
  46. GRB060813: Swift/UVOT upper limits
  47. GRB 060813: Swift XRT refined analysis
  48. GRB 060813: Refined analysis of the Swift-BAT burst
  49. GRB051109B: Late-time Radio Observations
  50. A dust-scattering halo detected around SGR 1806-20
  51. Swift detection of an outburst from the 4U 1246-58 LMXB burster
  52. GRB060807: Possible Highly Significant X-ray Emission Lines
  53. GRB060714: optical observations
  54. IBAS Alert n. 3422: not a GRB
  55. GRB060717: optical observations
  56. GRB 060805B: XRT Team Analysis
  57. GRB060806 is similar to previous activity of SGR1806-20
  58. GRB 060807: UVOT Upper limits
  59. GRB 060807: afterglow confirmation
  60. GRB 060807: XRT Team refined analysis
  61. GRB 060807: K- and R-band observations
  62. GRB 060807: Refined analysis of the Swift-BAT burst
  63. GRB 060805B: RHESSI Spectral Fit
  64. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  65. GRB060805 Liverpool Telescope observations
  66. GRB 060805: Swift-BAT Refined Analysis
  67. GRB 060805: Swift/UVOT Upper Limits
  68. GRB 060805: Swift detection of a burst
  69. GRB 060804: Swift UVOT observations
  70. GRB 060804: Refined analysis of the Swift-BAT burst
  71. GRB 060801: no variability of optical sources
  72. IBAS Alert 3418: not a GRB
  73. GRB 051109B: Bright spiral host galaxy at low redshift
  74. GRB060801: Swift/UVOT Upper Limits
  75. GRB 060801: optical observations at Hanle and Calar Alto
  76. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  77. GRB 060801: Swift detection of a short burst
  78. IBAS Alert n. 3415: not a GRB
  79. GRB 060729 redshift
  80. GRB 060729: Refined analysis of the Swift-BAT burst
  81. GRB 060729: Swift-XRT refined analysis
  82. GRB 060729: ROTSE-III Detection of Optical Counterpart
  83. GRB 060728: Swift/UVOT Upper Limits
  84. GRB 060728: Refined analysis of the Swift-BAT burst
  85. GRB 060728, SMARTS optical/IR observations
  86. GRB060719: prompt NIR observations with REM
  87. GRB 060719: near-infrared afterglow
  88. GRB 060719: Swift/UVOT Upper Limits
  89. GRB 060719: Refined analysis of the Swift-BAT burst
  90. GRB 060719: further analysis of VLT observations
  91. GRB060719: FRAM early follow-up limit
  92. GRB 060719: prompt PROMPT observations
  93. GRB 060714: Refined analysis of the Swift-BAT burst
  94. GRB060717: Swift/UVOT upper limits
  95. GRB 060717: Swift-BAT refined analysis
  96. GRB 060714: REM infrared observations
  97. GRB 060717: Swift detection of a burst
  98. GRB 060714, SMARTS optical/IR afterglow observation
  99. GRB 060605: SkyNet Optical Limits
  100. GRB 060712: XRT refined analysis

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