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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"

32549 results found.

  1. Possible precursor to the SGR1900+14 giant burst
  2. SGR1900+14, I-band observations
  3. IPN Triangulation of the Giant Flare from SGR1900+14
  4. GRB 010326b Optical Observations
  5. GRB010412: Optical observations
  6. GRB010412: Optical observations
  7. IPN Triangulation of GRB010412
  8. GRB Observation Report
  9. REVISED LOCATION OF GRB010326A
  10. GRB 980326: Late-time HST/STIS observations
  11. GRB010324, field photometry
  12. GRB010326B, field photometry
  13. GRB010326, field photometry
  14. GRB010220, field photometry
  15. Further Optical Observations of GRB 010324
  16. GRB010222, CXO X-ray observations
  17. GRB010324: BeppoSAX/GRBM data
  18. GRB010324, optical observations
  19. Duration, ECT, peak flux and fluence of GRB010324
  20. Optical Observations of GRB 010324
  21. IPN TRIANGULATION OF GRB010324
  22. GRB990705, VLT-FORS1 observations of the host galaxy
  23. GRB010222, late-time optical observation
  24. GRB 010222 - HEGRA GeV/TeV Observations
  25. Congratulate Scott on the 1000th GRB Coordinates Network Circular!
  26. GRB010222: Chandra X-ray Observatory Observation
  27. GRB010222: Sub-millimeter vanishing act
  28. GRB010222 - Optical observation
  29. GRB 010222, Optical Observations
  30. GRB010220 optical obsercations
  31. GRB010222 - Optical observation
  32. GRB 010222: High-Resolution Keck Spectroscopy
  33. GRB010222: Optical observation and decay
  34. GRB 010214, I-band data
  35. Sub-millimeter Excess/GRB 010222
  36. GRB 010222
  37. GRB 010222 HST/Chandra TOO
  38. GRB010222 further R-band photometry
  39. GRB010222: R-band data
  40. GRB010222 Optical observations
  41. GRB 010222: Keck Spectroscopy
  42. GRB010222 further R-band photometry
  43. GRB010222, possible increase of optical decay slope
  44. GRB010222: fading behavior
  45. GRB 010222 BV optical observations
  46. GRB010222 R-BAND OBSERVATION
  47. GRB 010220: Near-IR Observations
  48. GRB010214 follow-up from Hanle
  49. GRB 010222: Near-IR Observations
  50. GRB 010222: Optical Observations
  51. GRB 010222, Decay Slope Confirmed
  52. GRB010222: Another absorption line system
  53. GRB010222: Optical decay slope
  54. GRB 010214, Optical Observations
  55. GRB010222: Sub-millimeter detection
  56. GRB010222: R-band fading behavior
  57. GRB010222: Optical Observations
  58. GRB010222, radio observations
  59. GRB010222, optical observations
  60. GRB010222: BeppoSAX/NFI Observations
  61. Redshift of the Optical Transient of GRB010222
  62. GRB010222: possible optical counterpart
  63. GRB010222
  64. GRB010222: BeppoSAX refined position
  65. ALERT: GRB010222: the brightest GRB observed by BeppoSAX
  66. GRB010220, Radio and Optical Observations
  67. GRB 010220, simultaneous optical observations
  68. GRB010220: BeppoSAX WFC and GRBM preliminary data
  69. GRB010214, candidate optical afterglow
  70. GRB010214, optical observations
  71. GRB010214: BeppoSAX WFC and GRBM preliminary data
  72. GRB 010214: X-Ray afterglow
  73. GRB 010214, Optical Observations
  74. GRB 010214 optical observation
  75. GRB010213, Radio Observations
  76. GRB010213 Optical Observation
  77. GRB010213, Radio Observations
  78. J-Band Observation of GRB 010214.
  79. GRB010214, Radio Observations
  80. GRB010214, optical observations
  81. GRB010213, optical observations
  82. Possible InfraRed Transient of GRB 010214.
  83. GRB010214 Optical Observation
  84. GRB010213 (HETE) TAROT observations
  85. GRB 010214, optical observations
  86. IPN Status Report
  87. HETE Status
  88. GRB010126 opt. obs.
  89. IPN/RXTE TRIANGULATION OF GRB010126
  90. GRB010126: CONCAM crude optical limits during GRB
  91. GRB010126, TNG R-band observations
  92. GRB010126 Optical Observations
  93. GRB010126 optical observations
  94. GRB010126: Optical observations
  95. IPN/RXTE TRIANGULATION OF GRB010126
  96. GRB 010119, optical observations
  97. GRB010119: Optical observations
  98. Optical Observations of GRB 001018 at Keck
  99. GRB010119, Radio observations
  100. Optical observations of GRB 001018 with JCAM

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