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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"

21908 results found.

  1. SGR1900+14: Second Burst Localized by HETE
  2. SGR1900+14: A Burst Localized by HETE
  3. SGR1806-20: A Second, Intense Burst Localized by HETE
  4. SGR1806-20: Localization by HETE
  5. HETE Fully-Automated GCN Notices
  6. GRB000301C: Late-time HST/STIS observation
  7. GRB010518: a faint BeppoSAX detection
  8. GRB000418: HST/STIS Second-epoch Observations
  9. X-ray precursors to the large flare from SGR 1900+14
  10. GRB010427, Gamma Ray Observations
  11. BeppoSAX/NFI Follow-up Observation of SGR 1900+14
  12. SGR 1900+14: Correction to GCN 1049
  13. Millimeter observation of SGR 1900+14
  14. SGR 1900+14: Detection of extended X-ray emission
  15. SGR 1900+14, Chandra observations
  16. Possible precursor to the SGR1900+14 giant burst
  17. SGR1900+14, I-band observations
  18. IPN Triangulation of the Giant Flare from SGR1900+14
  19. GRB010412, field photometry
  20. Giant flare from SGR1900+14
  21. GRB 010326b Optical Observations
  22. GRB010412: BeppoSAX GRBM and WFC observations
  23. GRB010324, revised field photometry
  24. REVISED LOCATION OF GRB010326A
  25. GRB 980326: Late-time HST/STIS observations
  26. GRB010324, field photometry
  27. GRB010326B, field photometry
  28. GRB010326, field photometry
  29. GRB010220, field photometry
  30. Further Optical Observations of GRB 010324
  31. GRB010222, CXO X-ray observations
  32. GRB010324, optical observations
  33. GRB010326B: Localization by HETE (2nd GRB for this date)
  34. GRB 010326 optical observations
  35. GRB010326: Refined Localization by HETE
  36. GRB010326: Localization by HETE
  37. Optical Observations of GRB 010324
  38. GRB010222, late-time optical observation
  39. Support extension to the BeppoSAX mission
  40. GRB 010222, Optical Observations
  41. GRB 010222: High-Resolution Keck Spectroscopy
  42. GRB010222 further R-band photometry
  43. GRB 010222: Keck Spectroscopy
  44. GRB010214, field photometry
  45. GRB010222, field photometry
  46. GRB010222 further R-band photometry
  47. GRB 010222 Kyoto optical observation
  48. GRB010222 R-BAND OBSERVATION
  49. GRB010214 follow-up from Hanle
  50. GRB 010222: Near-IR Observations
  51. GRB 010222: Optical Observations
  52. GRB010222, radio observations
  53. GRB010222, optical observations
  54. GRB010214B,Gamma Ray Observations
  55. ALERT: GRB010222: the brightest GRB observed by BeppoSAX
  56. GRB 010220, simultaneous optical observations
  57. GRB010220: BeppoSAX WFC and GRBM preliminary data
  58. GRB010214, optical observations
  59. GRB010214: BeppoSAX WFC and GRBM preliminary data
  60. GRB 010214: X-Ray afterglow
  61. GRB 010214 optical observation
  62. GRB010213, Radio Observations
  63. J-Band Observation of GRB 010214.
  64. GRB010214, Radio Observations
  65. GRB010213, Near-IR observations
  66. Possible InfraRed Transient of GRB 010214.
  67. GRB010213 (HETE) TAROT observations
  68. GRB010213 detected by HETE
  69. BeppoSAX ALERT: GRB010214
  70. HETE Status
  71. IPN/RXTE TRIANGULATION OF GRB010126
  72. GRB010126 optical observations
  73. IPN/RXTE TRIANGULATION OF GRB010126
  74. Optical Observations of GRB 001018 at Keck
  75. GRB010119, Radio observations
  76. Optical observations of GRB 001018 with JCAM
  77. IPN TRIANGULATION OF GRB010115
  78. IPN TRIANGULATION OF GRB010109
  79. IPN triangulation of GRB010103
  80. GRB 001204: Ks observations
  81. GRB 001212 Optical Observation
  82. GRB 001212 Optical Observation
  83. GRB001204, Radio observations
  84. IPN triangulation of GRB001204 (short/hard)
  85. GRB001120: Gunn-i observations
  86. GRB001120, optical observations
  87. WSRT 4.8 GHz observations of GRB001109
  88. IPN triangulation of GRB001120
  89. GRB 001109: deep JHK upper limits
  90. GRB 001109 X-ray afterglow with BeppoSAX
  91. CORRECTION to XMM-Newton observation of GRB001025
  92. GRB001109, Radio observations
  93. GRB001105 BVRI field photometry correction
  94. GRB001105, BVRI field photometry
  95. GRB 001025B, Optical obervations
  96. GRB 991208: HST Imaging of the Host Galaxy
  97. GRB 001025B, I-band observations
  98. GRB001025B, Radio observations
  99. IPN TRIANGULATION OF GRB001025B (SHORT/HARD)
  100. IPN triangulation of GRB001025

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