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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').
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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"

24622 results found.

  1. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  2. GRB 020322: BeppoSAX observations of the X-ray afterglow
  3. SN 2002ap - peak brightness date (SN/GRB?)
  4. GRB 020322 optical observations
  5. GRB 011121: Fourth Epoch of HST Imaging
  6. GRB020321: a faint BeppoSAX detection
  7. GRB 020317 : KISO Optical Observations
  8. GRB020317 (=H1959): Localization by HETE of a Low Fluence GRB
  9. GRB 020305: Optical Observations
  10. GRB020317, optical observations
  11. GRB 011121: Third HST Epoch
  12. GRB 011121: HST Observations reveal an intermediate-time multicolor
  13. GRB011121, possible supernova association
  14. XRF/GRB 011030: Detection of the Probable Host Galaxy
  15. GRB020305, optical observations
  16. IPN triangulation of GRB020305 (HETE 1939)
  17. GRB020305 (=H1939): Localization of a GRB by HETE
  18. HST Imaging of the afterglow and host of GRB 011121
  19. IPN detection and localization of Cygnus X-1 flares
  20. RXTE Observations of SGR 1900+14
  21. IPN detection of further SGR1900+14 activity
  22. SGR1900+14 activity
  23. IPN/HETE Detection of Bursts from SGR1900+14
  24. IPN Upper Limits to a GRB Associated With SN2002ap
  25. GRB020127: Palomar and VLA Observations of Possible Counterparts
  26. GRB020127: Comparison of Chandra Epochs and Identification of Possible Counterparts
  27. SN2002ap (SN/GRB?) Echelle spectra
  28. GRB020127 Optical Observations
  29. SN2002ap (SN/GRB?) UBVRI Field Photometry
  30. GRB020127: Chandra Observations and Prospective Counterparts
  31. GRB020124, optical observations
  32. IPN detection of further activity from SGR1806-20
  33. GRB020127(=H1902): Localization of a Double-Peaked GRB by HETE
  34. GRB020124: Optical observations
  35. IPN observations of SGR1806-20
  36. GRB 020124: Optical afterglow
  37. GRB020124(=H1896): Localization of a Long GRB by HETE
  38. GRB 011211, spectrum and optical photometry
  39. GRB 011211: TNG Spectroscopic Observations
  40. GRB011212 (=H10001): An X-Ray Rich GRB Detected by HETE
  41. GRB011130, optical observations
  42. GRB011130 (=XRF011130): Second Revised Localization by HETE
  43. GRB011130 (XRF011130) optical observations
  44. GRB011130 (=XRF011130): Revised Localization of an X-ray
  45. GRB011130 (=H1864): An X-Ray Rich GRB Detected by HETE
  46. GRB 011121: J-band observations
  47. GRB011121
  48. GRB011030: Z-band observations
  49. GRB 010921: HST Detection of the Afterglow and Host Galaxy
  50. GRB 970828: HST Observations of the Host Galaxy
  51. GRB 000131: HST Detection of the Host Galaxy
  52. GRB 970828: HST Observations of the Host Galaxy
  53. GRB010921, optical observation
  54. Optical observation of SGR 1806-20 at the 6-m SAO telescope
  55. GRB011019: Subaru Optical Observations
  56. GRB010921, optical observation at early time
  57. GRB 010921, I-band observations
  58. GRB011019: A Faint, X-ray Rich GRB localized by HETE
  59. GRB010921: Spectroscopy of the Host Galaxy
  60. GRB010923 as seen by BeppoSAX GRBM
  61. GRB010928(=H1770): Localization of a Long GRB by HETE
  62. GRB010923(=H1764): A Short Duration GRB Detected by HETE
  63. GRB010921, negative optical observations
  64. GRB010921 Optical Observations
  65. H1761: A Bright GRB Detected by HETE
  66. HETE Trigger #1760 (GRB 010920B?): a new optical source
  67. HETE Trigger #1759 (GRB 010920?) optical observations
  68. GRB 010222: HST observations -- host galaxy and late-time decay
  69. Dramatic Increase in the Rate of X-ray Bursts Reported by HETE
  70. SGR1900+14 burst seen by HETE: BeppoSAX data
  71. SGR1900+14: High Fluence Burst Localized by HETE
  72. GRB010629: A Burst Localized by HETE
  73. SGR1900+14: Second Burst Localized by HETE
  74. SGR1900+14: A Burst Localized by HETE
  75. Possible burst from SGR1806-20
  76. IPN detection of SGR1900+14
  77. SGR1806-20: A Second, Intense Burst Localized by HETE
  78. SGR1806-20: Localization by HETE
  79. HETE Fully-Automated GCN Notices
  80. GRB000301C: Late-time HST/STIS observation
  81. GRB010518: a faint BeppoSAX detection
  82. GRB000418: HST/STIS Second-epoch Observations
  83. X-ray precursors to the large flare from SGR 1900+14
  84. GRB010427, Gamma Ray Observations
  85. SGR 1900+14 : RXTE observations
  86. Chandra Observations of SGR 1900+14
  87. Possible precursor to the SGR1900+14 giant burst
  88. SGR1900+14, I-band observations
  89. IPN Triangulation of the Giant Flare from SGR1900+14
  90. Giant flare from SGR1900+14
  91. GRB010412: BeppoSAX GRBM and WFC observations
  92. BeppoSAX GRB: extension of BSAX operations upto April 30, 2002
  93. REVISED LOCATION OF GRB010326A
  94. GRB 980326: Late-time HST/STIS observations
  95. GRB010324, field photometry
  96. GRB010326B, field photometry
  97. GRB010326, field photometry
  98. Further Optical Observations of GRB 010324
  99. GRB010324: BeppoSAX/GRBM data
  100. GRB010324, optical observations

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