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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"

19210 results found.

  1. GRB000301C: RXTE/ASM and IPN localizations
  2. GRB000226 [IPN Position]
  3. GRB000214: BeppoSAX GRBM and WFC Detection
  4. GRB000214 refined BeppoSAX-WFC position
  5. GRB 000210: BATSE Observations
  6. IPN triangulation of GRB000210
  7. GRB000210: possible afterglow detection with BeppoSAX NFI
  8. GRB000210: BeppoSAX GRBM and WFC Detection
  9. SAX_WFC_GRB_NOTICE
  10. SAX_WFC_GRB_NOTICE
  11. GRB000201 Optical Observations
  12. GRB 000201: TAROT optical observations
  13. GRB 991208, radio observations
  14. BATSE+IPN location of GRB000131
  15. IPN localization of GRB000131
  16. GRB 000126, optical observations
  17. BATSE location of GRB000126
  18. IPN localization of GRB000126
  19. BATSE Observations of GRB000115
  20. Second RXTE Observation of GRB 000115
  21. GRB991216 late optical observation
  22. GCN resumes full operations
  23. GRB 991216 VLBA Observations
  24. GRB 991216: J band spectrophotometry
  25. GRB 991216: Detection of the Host and/or Absorber Galaxy
  26. IPN localization of GRB991226
  27. GRB 991216 RXTE ASM Observations
  28. GRB 991216: Updated BATSE parameters
  29. Chandra observation of the X-ray afterglow of GRB991216
  30. GRB 991216, optical observations
  31. GRB 991216 Optical spectroscopy/imaging
  32. GRB991216 Optical and infrared observations of Beethoven Burst
  33. GRB 991208 Keck Spectroscopy
  34. GRB 991216--Summary of RXTE Observations
  35. SAX J2303.2+0015: an x-ray/GRB?
  36. GRB 991208 optical observations
  37. GRB 991216 Optical Observation
  38. GRB 991216: Extremely bright BATSE burst
  39. R-band Observations of GRB991208 at TNG
  40. GRB991208, optical observations
  41. GRB 991208 optical observations
  42. GRB991106: BeppoSAX/BATSE results
  43. GRB991106, near-infrared observations
  44. BeppoSAX NFI Observation of GRB991106
  45. GRB 991106, radio observations
  46. GRB991106: the first BeppoSAX short GRB detection?
  47. GRB 991105: BATSE Observations
  48. GRB 991014 - X-ray afterglow identification by BeppoSAX-NFI
  49. GRB 991014 - BeppoSAX NFI observations
  50. GRB 990915 optical observations
  51. Optical Observations of GRB990907
  52. GRB990907: BeppoSAX follow up and X-ray afterglow
  53. GRB990907: refined WFC position
  54. BeppoSAX MAIL n. 99/24: GRB ALERT: GRB990907
  55. GRB 990712 Late Optical Decay and Host Galaxy
  56. GRB990806 BeppoSAX follow up
  57. GRB990806: BATSE Observations
  58. GRB 990806 Optical observations
  59. GRB 990806, Optical Observations
  60. GRB 990806, optical observations
  61. GRB990806 UBVRIJHK observations
  62. GRB 990712
  63. GRB 990705, R-band observations
  64. Infrared and Optical Observations of GRB990705
  65. GRB990704: SAX-NFI results summary
  66. Refined BeppoSAX-WFC position of GRB990704: Errata Corrige
  67. GRB990704, optical observations
  68. Refined BeppoSAX-WFC position of GRB990704
  69. BeppoSAX NFI Observation of GRB990627 X-ray afterglow
  70. Optical Observations of GRB990627
  71. BeppoSAX: GRB990625
  72. Late Afterglows of GRBs 990510, 990123
  73. X-ray/GRB 1SAX J0835.9+5118, TNG V and R observations
  74. X-ray/GRB 1SAX J0835.9+5118, BATSE Observation
  75. radio observations of X-ray/GRB transient field
  76. Optical report on X-ray/GRB transient
  77. radio detection of X-ray/GRB transient
  78. BeppoSAX: A new fast X-ray transient
  79. GRB 990510: optical observations
  80. GRB 990510: optical observations
  81. GRB 990506 R band observations
  82. GRB990510: X-ray afterglow
  83. GRB 990510: Broad Band Break
  84. GRB 990510: BATSE Observations
  85. GRB 990510: BeppoSAX/GRBM observations
  86. GRB990510 optical observations
  87. GRB 990510 optical observations
  88. GRB 990506: BATSE Observations
  89. GRB 990506, Optical Observations
  90. GRB 990506 optical observations
  91. GRB990506 observation plan
  92. GRB 990506: Limits on the possible optical transient
  93. GRB 990506, armchair astronomy
  94. GRB 990506, optical observations from +1 to +3 hours
  95. IPN localization for GRB990506
  96. GRB990323 PRECISE IPN POSITION
  97. GRB 990316 optical observations
  98. GRB990316: simultaneous optical observation
  99. GRB990316 - Optical null results
  100. GRB990308 not a new SGR

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