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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"

36195 results found.

  1. GRB 010222 - HEGRA GeV/TeV Observations
  2. Congratulate Scott on the 1000th GRB Coordinates Network Circular!
  3. GRB010222: Chandra X-ray Observatory Observation
  4. GRB010222: Sub-millimeter vanishing act
  5. GRB 010222, Optical Observations
  6. GRB 010222: High-Resolution Keck Spectroscopy
  7. GRB 010214, I-band data
  8. Sub-millimeter Excess/GRB 010222
  9. GRB 010222
  10. GRB 010222 HST/Chandra TOO
  11. GRB 010222
  12. GRB010222 further R-band photometry
  13. GRB010222: R-band data
  14. GRB010222 Optical observations
  15. GRB 010222: Keck Spectroscopy
  16. GRB010214, field photometry
  17. GRB010222, field photometry
  18. GRB010222 further R-band photometry
  19. GRB010222, possible increase of optical decay slope
  20. GRB 010222 Kyoto optical observation
  21. GRB010222: fading behavior
  22. GRB 010222 BV optical observations
  23. GRB 010220: Near-IR Observations
  24. GRB010214 follow-up from Hanle
  25. GRB 010222: Near-IR Observations
  26. GRB 010222: Optical Observations
  27. GRB 010222, Decay Slope Confirmed
  28. GRB010222: Another absorption line system
  29. GRB010222: Optical decay slope
  30. GRB 010214, Optical Observations
  31. GRB010222: Sub-millimeter detection
  32. GRB010222: R-band fading behavior
  33. GRB010222: Optical Observations
  34. GRB010222, optical observations
  35. GRB010222: BeppoSAX/NFI Observations
  36. Redshift of the Optical Transient of GRB010222
  37. GRB010214B,Gamma Ray Observations
  38. GRB010222
  39. ALERT: GRB010222: the brightest GRB observed by BeppoSAX
  40. GRB 010220, simultaneous optical observations
  41. GRB010220: BeppoSAX WFC and GRBM preliminary data
  42. BeppoSAX ALERT: GRB010220
  43. GRB010214: BeppoSAX WFC and GRBM preliminary data
  44. GRB 010214: X-Ray afterglow
  45. GRB 010214, Optical Observations
  46. GRB 010214 optical observation
  47. GRB010213 Optical Observation
  48. J-Band Observation of GRB 010214.
  49. GRB010213, Near-IR observations
  50. Possible InfraRed Transient of GRB 010214.
  51. GRB010214 Optical Observation
  52. GRB010214: BeppoSAX/NFI Observations
  53. GRB010213 (HETE) TAROT observations
  54. GRB 010214, optical observations
  55. BeppoSAX ALERT: GRB010214
  56. IPN Status Report
  57. HETE Status
  58. GRB010126 opt. obs.
  59. IPN/RXTE TRIANGULATION OF GRB010126
  60. GRB010126: CONCAM crude optical limits during GRB
  61. GRB010126, TNG R-band observations
  62. IPN TRIANGULATION OF GRB010126
  63. IPN/RXTE TRIANGULATION OF GRB010126
  64. GRB 010119, optical observations
  65. GRB010119: Optical observations
  66. Optical Observations of GRB 001018 at Keck
  67. IPN TRIANGULATION OF GRB010119 (SHORT/HARD)
  68. Optical observations of GRB 001018 with JCAM
  69. IPN TRIANGULATION OF GRB010115
  70. IPN TRIANGULATION OF GRB010109
  71. GRB010103, optical observations
  72. IPN triangulation of GRB010104
  73. IPN triangulation of GRB010103
  74. GRB 001204: Ks observations
  75. H band observation of GRB 001212
  76. GRB & BeppoSAX: ground operations restored back to 24 hrs a day
  77. IPN triangulation of GRB001219
  78. GRB 001212 Optical Observation
  79. GRB 001212 Optical Observation
  80. GRB 001212 optical observation
  81. GRB 001212 possible OA in 2MASS
  82. GRB 001212 possible OA
  83. IPN triangulation of GRB001212
  84. Confirmation of IPN position for GRB001204
  85. IPN triangulation of GRB001204 (short/hard)
  86. GRB 001105, further optical observations
  87. GRB001120: Gunn-i observations
  88. GRB001120: Optical observations
  89. GRB001109, optical observations
  90. GRB001120, optical observations
  91. IPN triangulation of GRB001120
  92. Optical/NIR observations of GRB001109
  93. GRB 001109: deep JHK upper limits
  94. GRB 001109 X-ray afterglow with BeppoSAX
  95. GRB001109: Optical observations
  96. GRB001109: BeppoSAX/NFI Observations
  97. GRB001109, R-band optical observations
  98. GRB001109, Radio observations
  99. BeppoSAX ALERT: GRB001109
  100. GRB001105 BVRI field photometry correction

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