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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"

35999 results found.

  1. GRB011121: possible redshift, continued decay
  2. IPN triangulation of GRB011121
  3. BEPPOSAX GRB011121
  4. GRB 011030: TNG K-band observation
  5. XRF011030: Chandra Observations
  6. GRB 011030: K-band observations
  7. GRB 011030 R band observations
  8. GRB 011030 I-band Observation
  9. The X-ray Flash 011030 ('GRB 011030')
  10. Non-triggered burst 011030 ("GRB 011030")
  11. The Radio Afterglow from the X-ray Rich GRB 011030
  12. GRB 010921: HST Detection of the Afterglow and Host Galaxy
  13. GRB 970828: HST Observations of the Host Galaxy
  14. GRB 000131: HST Detection of the Host Galaxy
  15. GRB 970828: HST Observations of the Host Galaxy
  16. GRB010921, optical observation
  17. GRB 011019 optical observation
  18. GRB011019: Subaru Optical Observations
  19. GRB 011030 I-band Observations
  20. GRB 011030 K-band Observations
  21. GRB010921, optical observations
  22. GRB 011030, WSRT radio observations
  23. GRB011030 - further refinement WFC position
  24. GRB 011030, Radio observations
  25. GRB 011030, R-band observations
  26. BeppoSAX ALERT: Possible X-ray rich GRB011030
  27. GRB 010921: Possible supernova component
  28. GRB011019: NEAT Optical Observations
  29. GRB010921, optical observation at early time
  30. GRB 010921, I-band observations
  31. GRB011019: Optical observations
  32. GRB011019, optical observations
  33. GRB011019: A Faint, X-ray Rich GRB localized by HETE
  34. GRB010921: Spectroscopy of the Host Galaxy
  35. GRB 010921: The afterglow of HETE #1761
  36. Optical Observations of the field of HETE trigger #1793/GRB 011012?
  37. Optical Observations of the field of HETE trigger #1793/GRB 011012?
  38. GRB010923 as seen by BeppoSAX GRBM
  39. GRB010928(=H1770): Localization of a Long GRB by HETE
  40. GRB010923(=H1764): A Short Duration GRB Detected by HETE
  41. GRB010921, negative optical observations
  42. GRB010921 field photometry
  43. GRB010921 Optical Observations
  44. GRB 010921 DPOSS Images Available
  45. IPN triangulation of GRB010921 (=H1761)
  46. H1761: A Bright GRB Detected by HETE
  47. HETE Trigger #1760 (GRB 010920B?): new optical source = asteroid
  48. HETE Trigger #1760 (GRB 010920B?): a new optical source
  49. HETE Trigger #1759 (GRB 010920?) optical observations
  50. GRB001109, Host Galaxy Astrometry
  51. GRB000926, Host Galaxy Observations
  52. GRB001109, Host Galaxy Spectroscopic Observations
  53. Probable SGR or Short Duration GRB Detected by HETE
  54. GRB000926 Host Galaxy Observations
  55. GRB 010222: HST observations -- host galaxy and late-time decay
  56. BeppoSAX/GRBM detection of GRB 010801
  57. Dramatic Increase in the Rate of X-ray Bursts Reported by HETE
  58. GRB 010222 - WHT BVRI images
  59. GRB 010629 Optical Observations
  60. GRB010629: Optical Observations
  61. GRB010629, optical observations
  62. IPN triangulation of GRB010629
  63. GRB010629: A Burst Localized by HETE
  64. Possible burst from SGR1806-20
  65. IPN detection of SGR1900+14
  66. GRB 00630: Host Galaxy
  67. IPN triangulation of GRB010613
  68. IPN triangulation of GRB010612
  69. HETE Fully-Automated GCN Notices
  70. GRB000301C: Late-time HST/STIS observation
  71. GRB010518: a faint BeppoSAX detection
  72. GRB000418: HST/STIS Second-epoch Observations
  73. GRB010427, Gamma Ray Observations
  74. SGR1900+14
  75. GRB 010222 /corrections to VBT data
  76. Possible precursor to the SGR1900+14 giant burst
  77. IPN Triangulation of the Giant Flare from SGR1900+14
  78. GRB010412, field photometry
  79. GRB 010326b Optical Observations
  80. GRB010412: Optical observations
  81. GRB010412: Optical observations
  82. IPN Triangulation of GRB010412
  83. BeppoSAX GRB: extension of BSAX operations upto April 30, 2002
  84. BeppoSAX GRB ALERT: GRB010412
  85. GRB Observation Report
  86. GRB010324, revised field photometry
  87. REVISED LOCATION OF GRB010326A
  88. GRB 980326: Late-time HST/STIS observations
  89. GRB010324, field photometry
  90. GRB010326B, field photometry
  91. GRB010326, field photometry
  92. GRB010220, field photometry
  93. Further Optical Observations of GRB 010324
  94. GRB 010326A: Further optical observations
  95. GRB010324: BeppoSAX/GRBM data
  96. GRB 010326B: Optical observations
  97. GRB010324, optical observations
  98. GRB010326B: Localization by HETE (2nd GRB for this date)
  99. GRB 010326: Optical observations
  100. GRB 010326 optical observations

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