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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"

22198 results found.

  1. GRB000301c optical observations
  2. GRB 000301A, Radio Observations
  3. GRB000301C, optical observations
  4. GRB000301c, near-infrared observations
  5. Radio observations of the error box of GRB000301A
  6. GRB000301C: RXTE/ASM and IPN localizations
  7. GRB000301A [IPN Position]
  8. GRB000226 [IPN Position]
  9. HST Observations of GRB 990712
  10. GRB 000214 near-IR observations
  11. GRB 000115 Optical observations
  12. GRB 000214, Radio Observations
  13. GRB000210, Radio Observations
  14. Optical observations of GRB000210
  15. GRB 000210: BATSE Observations
  16. Optical observations of the Chandra X-ray source for GRB000210
  17. GRB000210, Radio Observations
  18. Optical candidate for GRB000210
  19. Chandra Observations of GRB000210 X-ray Afterglow
  20. GRB000201, Radio Observations
  21. Optical observations of GRB000131
  22. GRB000201 Optical Observations
  23. GRB 000201: TAROT optical observations
  24. GRB 000131 Optical Observations
  25. GRB000126 Optical Observations
  26. GRB 991208, radio observations
  27. BATSE+IPN location of GRB000131
  28. IPN localization of GRB000131
  29. GRB 000126, optical observations
  30. GRB000126, optical observations
  31. IPN localization of GRB000126
  32. GRB 000115 Optical observations
  33. BATSE Observations of GRB000115
  34. IPN annulus for GRB000115
  35. GRB991216, UBVRIJHK field photometry
  36. GRB991216 late optical observation
  37. Single IPN error box for GRB991229
  38. GRB 991216 VLBA Observations
  39. BEPPOSAX GRBM Localization of GRB991226
  40. IPN error boxes for GRB991229
  41. GRB 991216: J band spectrophotometry
  42. IPN localization of GRB991226
  43. Single IPN error box for GRB991221
  44. IPN error boxes for GRB991221
  45. GRB 991216 RXTE ASM Observations
  46. IPN error box for GRB991216
  47. Lowell/Perkins observation of GRB 991216
  48. GRB 991217 (SAX J2303.2+0015) Optical observations
  49. GRB991217/SAX J2303.2+0015, optical observations
  50. GRB 991216, optical observations
  51. GRB 991216 Optical Observations
  52. GRB991216 Optical and IR observations
  53. K observations of GRB991216
  54. SAX J2303.2+0015 Optical observations
  55. IR observations of GRB991216
  56. GRB991216 radio observations
  57. GRB 991217 (SAX J2303.2+0015) Optical observations
  58. GRB991216 radio observations
  59. GRB991216, optical observations
  60. GRB991216 Optical and infrared observations of Beethoven Burst
  61. GRB 991216 Radio Observations
  62. GRB 991208 Keck Spectroscopy
  63. GRB 991208 Infrared Detection
  64. GRB991216
  65. GRB 991216--Summary of RXTE Observations
  66. GRB 991216 Optical Observations
  67. GRB 991216, optical observations
  68. GRB 991216, Optical Transient
  69. GRB 991216, Optical Afterglow
  70. GRB991216 ('Beethoven Burst') B, R, and K Observations
  71. GRB991216, infrared observations
  72. GRB991216 Optical Observations
  73. GRB 991208 optical observations
  74. GRB 991208 Keck Spectroscopy
  75. GRB 991216: Extremely bright BATSE burst
  76. R-band Observations of GRB991208 at TNG
  77. GRB991208, optical observations
  78. GRB 991208 Keck Spectroscopy
  79. GRB991208 15-GHz observations
  80. GRB991208, optical observations
  81. GRB 991208 - OVRO detection
  82. GRB 991208 optical observations
  83. GRB 991208 optical observations
  84. GRB 991208: Radio Observations
  85. IPN localization of GRB991208
  86. Optical Observations of GRB991105
  87. GRB991106: BeppoSAX/BATSE results
  88. GRB 991106, optical observations
  89. GRB991106, near-infrared observations
  90. GRB 991106, radio observations
  91. GRB 991105: BATSE Observations
  92. IPN localization of GRB991105
  93. GRB 991106 Optical Observations
  94. GRB 991105, optical observations
  95. GRB 991106, LOTIS Optical Observations
  96. GRB 991106, optical observations
  97. GRB 991014, Optical Observations
  98. GRB 991014 - BeppoSAX NFI observations
  99. GRB 991014, Optical Observations
  100. GRB 991014, radio observations

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