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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"

32689 results found.

  1. Redshift of the Optical Transient of GRB010222
  2. GRB010222: possible optical counterpart
  3. GRB010222
  4. GRB010222: BeppoSAX refined position
  5. ALERT: GRB010222: the brightest GRB observed by BeppoSAX
  6. GRB010220, Radio and Optical Observations
  7. GRB 010220, simultaneous optical observations
  8. GRB010220: BeppoSAX WFC and GRBM preliminary data
  9. GRB010214, candidate optical afterglow
  10. GRB010214, optical observations
  11. GRB010214: BeppoSAX WFC and GRBM preliminary data
  12. GRB 010214: X-Ray afterglow
  13. GRB 010214, Optical Observations
  14. GRB 010214 optical observation
  15. GRB010213, Radio Observations
  16. GRB010213 Optical Observation
  17. GRB010213, Radio Observations
  18. J-Band Observation of GRB 010214.
  19. GRB010214, Radio Observations
  20. GRB010214, optical observations
  21. GRB010213, optical observations
  22. Possible InfraRed Transient of GRB 010214.
  23. GRB010214 Optical Observation
  24. GRB010213 (HETE) TAROT observations
  25. GRB 010214, optical observations
  26. IPN Status Report
  27. HETE Status
  28. GRB010126 opt. obs.
  29. IPN/RXTE TRIANGULATION OF GRB010126
  30. GRB010126: CONCAM crude optical limits during GRB
  31. GRB010126, TNG R-band observations
  32. GRB010126 Optical Observations
  33. GRB010126 optical observations
  34. GRB010126: Optical observations
  35. IPN/RXTE TRIANGULATION OF GRB010126
  36. GRB 010119, optical observations
  37. GRB010119: Optical observations
  38. Optical Observations of GRB 001018 at Keck
  39. GRB010119, Radio observations
  40. Optical observations of GRB 001018 with JCAM
  41. IPN TRIANGULATION OF GRB010109
  42. GRB 001204: Ks observations
  43. H band observation of GRB 001212
  44. GRB 001212 Optical Observation
  45. GRB 001212 Optical Observation
  46. GRB 001212 optical observation
  47. GRB 001212 possible OA in 2MASS
  48. GRB 001212 possible OA
  49. GRB001204: Optical observations
  50. Confirmation of IPN position for GRB001204
  51. GRB001204, Radio observations
  52. GRB 001105, further optical observations
  53. GRB001120: Gunn-i observations
  54. GRB001109, optical observations
  55. WSRT 4.8 GHz observations of GRB001109
  56. Optical/NIR observations of GRB001109
  57. GRB 001109: deep JHK upper limits
  58. GRB 001109 X-ray afterglow with BeppoSAX
  59. CORRECTION to XMM-Newton observation of GRB001025
  60. GRB001109: Optical observations
  61. GRB001109, R-band optical observations
  62. GRB001109, Radio observations
  63. GRB001105 BVRI field photometry correction
  64. GRB001105, BVRI field photometry
  65. GRB 001105, R-band observation
  66. GRB 991208: HST Imaging of the Host Galaxy
  67. GRB000926: R-image of the host galaxy
  68. GRB 001025B, I-band observations
  69. XMM-Newton observation of GRB001025
  70. GRB001025B, Radio observations
  71. GRB 001025 Optical Observations
  72. GRB 001025A, optical observation
  73. CORRECTION TO IPN/RXTE ERROR BOX FOR GRB001025
  74. IPN triangulation of GRB001025
  75. GRB001007: Optical observations
  76. GRB001007, Radio observations
  77. GRB 001018, Possible Radio Afterglow
  78. CORRECTION TO PEAK FLUX OF GRB001018
  79. GRB 000926: Improved Absorber Redshift
  80. V,R,I band observations of GRB000926
  81. The Likely Optical/Infrared Afterglow of GRB 001011
  82. HETE positions added to GCN
  83. GRB 001007, BVR-band observations
  84. GRB001007: Optical observations
  85. CONCAM null result on GRB001005
  86. GRB 000926 : the host galaxy
  87. GRB 000926 Chandra Observation
  88. Public availability of BeppoSAX data of GRB000926
  89. GRB000926: X-ray afterglow by BeppoSAX: revised fluxes (fwd)
  90. GRB000926: X-ray afterglow by BeppoSAX. Refined analysis
  91. GRB000926 - Optical observations
  92. GRB000926 - Optical observations
  93. GRB 000926, Optical Decay
  94. GRB000911: VLT infrared observation
  95. GRB000926 - Optical observations
  96. GRB000926 - Optical observations
  97. GRB 000926: optical observations
  98. GRB 000926, Optical Observations
  99. GRB000926 - Optical observations
  100. GRB000911: optical VLT observations

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