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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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').
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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

892 results found.

  1. long burst from SGR 1806-20 detected on March 26
  2. GRB 070201: clarification on localization and Konus-Wind spectra
  3. IPN localization of very intense short GRB 070201
  4. GRB070107: Swift/XRT refined analysis
  5. GRB061222B: Swift-XRT Refined Analysis
  6. GRB061025: Swift XRT refined analysis
  7. IGR J08408-4503 (= V* LM Vel): Swift detection of a transient
  8. GRB 060729: An update on the late-time Swift observations
  9. GRB 060926: Swift XRT refined analysis
  10. Two bright bursts from SGR 1806-20 detected with IBAS
  11. Image of the dust-scattering halo around SGR 1806-20
  12. Second VLA limit on new radio point source in SGR 1806-20
  13. A dust-scattering halo detected around SGR 1806-20
  14. VLA Upper Limit on Outburst of SGR 1806-20
  15. GRB060806 is similar to previous activity of SGR1806-20
  16. BAT Trigger #214277 is SGR 1900+14
  17. SGR 1900+14: Refined analysis of the Swift-BAT outburst
  18. SGR 1900+14: Swift detection of an outburst
  19. SGR 1900+14: BAT observations
  20. Konus-Wind observation of the recent SGR 1900+14 activity. Will
  21. SGR 1900+14: bright burst detected by Konus-Wind on March 28
  22. SGR 1900+14: Swift-BAT detection of a cluster of outbursts
  23. SGR 1900+14: Swift-BAT detection of a bright outburst
  24. SGR 1900+14: CORRECTION to GCN 4923
  25. SGR 1900+14: Refined Swift-BAT analysis of the renewed activity
  26. SGR 1900+14: Swift detection of renewed activity
  27. GRB 060218: rebrightening
  28. GRB060213: Swift XRT observations and possible afterglow candidate
  29. GRB060204a: Swift XRT Detection of an Afterglow Candidate
  30. Swift XRT Observation of GRB 060204C
  31. GRB060203: Swift XRT Team Refined Analysis
  32. An extraordinary long burst on December 3 from SGR1806-20
  33. Possible resuming of the SGR 1806-20 activity
  34. GRB050925: analysis of the XMM-Newton observation
  35. GRB/SGR 050925: XMM-Newton ToO observation
  36. GRB051103: MASTER: OT limit and host galaxy candidates
  37. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  38. SGR 1806-20: continued moderate activity seen with INTEGRAL
  39. GRB/SGR 050925: IR Observations
  40. GRB050925: Swift-BAT detection of a short burst
  41. Possible GRB 050922 detected by INTEGRAL
  42. GRB 050906: Swift-BAT refined analysis
  43. GRB 050906: Bright galaxy in BAT error box
  44. Ongoing activity of SGR 1806-20: an intermediate burst 050811
  45. Detection of an intermediate burst from SGR 1806-20 on August 8
  46. GRB 050716: Refined XRT analysis.
  47. H11603: An X-ray flare from V4641 Sgr, or a possible XRF
  48. Konus-Wind observation of an intermediate burst from SGR 1806-20
  49. GRB 050509B: Swift/XRT refined analysis
  50. Renewal of SGR 1806-20 activity
  51. GRB 050502 - A long GRB detected with INTEGRAL
  52. Ongoing activity of SGR 1806-20 after the giant flare
  53. SGR 1806-20: GMRT results at 240 MHz band.
  54. SGR 1806-20: low frequency GMRT results of 2005 Jan 16.
  55. SGR 1806-20: RXTE/PCA pulse frequency during flare
  56. SGR 1806-20: Further VLA Observations
  57. SGR 1806-20: Further low frequency GMRT results
  58. SGR 1806-20: Further VLA Observations
  59. SGR1806: Optical Transient Candidates in SOHO/LASCO Images
  60. Further VLA observations of SGR 1806-20
  61. SGR 1806-20 and extragalactic short-duration GRBs
  62. Further ATCA observations of SGR 1806-20
  63. Fourth Epoch VLA observations of SGR 1806-20
  64. SGR 1806-20: Low frequency GMRT results; submission to GCN circulars
  65. SGR 1806-20: Temporal and Spectral behavior of radio transient
  66. ATCA observations of SGR 1806-20
  67. SGR 1806-20, RHESSI observations of the 041227 giant flare
  68. Third epoch observations of SGR 1806-20 with VLA
  69. Second Epoch VLA observations of SGR 1806-20
  70. Second-epoch VLA observations of SGR 1806-20
  71. SGR1806: Detection of a Sudden Ionospheric Disturbance
  72. DETECTION OF POLARIZATION OF THE RADIO EMISSION FROM SGR 1806-20
  73. VLA observations of SGR 1806-20
  74. SGR1806 VLA Observations
  75. VLA observations of SGR 1806-20
  76. SGR1806-20: RXTE-PCA observation of the 041227 super-flare
  77. Detection of the SGR 1806-20 giant outburst back-scattered by the
  78. The giant outburst from SGR 1806-20
  79. Giant flare from SGR 1806-20 detected by INTEGRAL
  80. Very high activity of SGR 1806-20
  81. GRB041220: Swift-BAT burst
  82. Swift-BAT detection of the bright long burst GRB041219
  83. GRB 041219 - A long GRB detected by INTEGRAL
  84. Summary of the recent bursts from SGR 1806-20
  85. IBAS GRB Alert # 2034
  86. Bright bursts from SGR1806-20
  87. Konus-Wind observation of a series SGR 1806-20 bursts on 041005
  88. Bursts from SGR 1806-20: Preliminary INTEGRAL results
  89. Very strong outburst from SGR 1806-20 detected with INTEGRAL
  90. SGR 1806-20 still active
  91. An intense burst from SGR1806-20
  92. Very bright burst detected from SGR 1806-20
  93. XMM-Newton Images of GRB 040827
  94. Increase of SGR 1806-20 activity
  95. Bursting activity from SGR 1806-20 detected with IBAS
  96. Ongoing activity of SGR 1806-20
  97. XRF040701: Second-Epoch Chandra Observations
  98. XRF040701: First-Epoch Chandra Observations
  99. GRB040706:observation at University of Miyazaki
  100. SGR 1806-20: no IR variability of the proposed counterparts

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