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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"

32552 results found.

  1. GRB991216, optical observations
  2. Refined IPN localization of GRB991216
  3. GRB 991216 Radio Observations
  4. GRB 991208 Keck Spectroscopy
  5. GRB 991208 Infrared Detection
  6. GRB991216
  7. GRB 991216--Summary of RXTE Observations
  8. GRB 991216 Optical Observations
  9. GRB 991216, optical observations
  10. GRB 991208 SAO-RAS Spectroscopy
  11. GRB 991216, Optical Transient
  12. GRB 991216, Optical Afterglow
  13. GRB991216 ('Beethoven Burst') B, R, and K Observations
  14. GRB 991216: Comparison with DPOSS images
  15. GRB 991208 optical observations
  16. Lowell/Perkins observation of GRB 991216
  17. GRB 991216 Optical Observation
  18. GRB 991208 Keck Spectroscopy
  19. R-band Observations of GRB991208 at TNG
  20. GRB991208, optical observations
  21. GRB 991208 Keck Spectroscopy
  22. GRB991208 - millimeter detection
  23. GRB 991208, Optical Observation
  24. GRB991208 15-GHz observations
  25. GRB991208, optical observations
  26. GRB 991208 - OVRO detection
  27. GRB 991208 Optical Decay
  28. GRB 991208 optical observations
  29. GRB 991208 optical observations
  30. GRB 991208: Radio Observations
  31. Optical Observations of GRB991105
  32. GRB991106: BeppoSAX/BATSE results
  33. GRB 991106, optical observations
  34. GRB991106, near-infrared observations
  35. BeppoSAX NFI Observation of GRB991106
  36. GRB 991106, radio observations
  37. GRB 991105: BATSE Observations
  38. IPN localization of GRB991105
  39. GRB 991106 Optical Observations
  40. GRB 991105, optical observations
  41. GRB991106, optical observation at SAO-RAS
  42. GRB 991106, LOTIS Optical Observations
  43. GRB 991106, optical observations
  44. Revised BeppoSAX WFC position of GRB991105
  45. GRB 991014 - X-ray afterglow identification by BeppoSAX-NFI
  46. GRB 991014, Optical Observations
  47. GRB 991014 - BeppoSAX NFI observations
  48. GRB 991014, Optical Observations
  49. GRB 991014, Optical Observations
  50. GRB 991014, optical observations
  51. Super-LOTIS optical observation of GRB991014
  52. IPN/NFI error box for GRB991014
  53. IPN localization of GRB991014 - CORRECTION
  54. IPN localization of GRB991014
  55. GRB 990915 optical observations
  56. GRB 990907 optical observations
  57. Optical Observations of GRB990907
  58. IPN error box for GRB990915 (=BATSE 7766)
  59. IPN localization of BATSE #7766 (GRB990915)
  60. GRB990907: BeppoSAX follow up and X-ray afterglow
  61. GRB990907 and 990908
  62. IPN localization of GRB990907
  63. GRB 990712 Late Optical Decay and Host Galaxy
  64. GRB 990712, Optical Observation
  65. GRB990806 BeppoSAX follow up
  66. GRB990806: BATSE Observations
  67. GRB 990806 Optical observations
  68. Optical Observations of GRB990806
  69. GRB 990806, Optical Observations
  70. GRB 990806, optical observations
  71. GRB 990806, Optical Observations
  72. GRB990806 UBVRIJHK observations
  73. GRB 990712 Optical Decay: Indication of Bright Host Galaxy
  74. VLT spectrum of GRB990712
  75. GRB 990712
  76. Late-time HST/STIS Observations of GRB 990510
  77. BeppoSAX NFI Observation of GRB990705
  78. BeppoSAX NFI Observation of GRB990705
  79. Updated Astrometry for the IR Counterpart of GRB990705
  80. GRB 990705, R-band observations
  81. Updated IPN localization of GRB990705
  82. IPN localization of GRB990704
  83. IPN localization of GRB990705
  84. Infrared and Optical Observations of GRB990705
  85. GRB 990705, radio observations
  86. GRB990704: SAX-NFI results summary
  87. GRB990704 radio and optical observations
  88. GRB 990704 X-ray Observations
  89. GRB 990704 Optical Observations
  90. GRB 990704, optical observations
  91. GRB990704
  92. GRB990704
  93. Refined BeppoSAX-WFC position of GRB990704: Errata Corrige
  94. GRB990704, optical observations
  95. GRB990704: possible X-ray afterglow
  96. Identification of a possible optical counterpart for GRB990704
  97. GRB990704
  98. BeppoSAX NFI Observation of GRB990627 X-ray afterglow
  99. Optical Observations of GRB990627
  100. GRB 990627, radio observations

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