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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"

36128 results found.

  1. GRB000418: HST/STIS Second-epoch Observations
  2. GRB010427, Gamma Ray Observations
  3. SGR1900+14
  4. GRB 010222 /corrections to VBT data
  5. Possible precursor to the SGR1900+14 giant burst
  6. IPN Triangulation of the Giant Flare from SGR1900+14
  7. GRB010412, field photometry
  8. GRB 010326b Optical Observations
  9. GRB010412: Optical observations
  10. GRB010412: Optical observations
  11. IPN Triangulation of GRB010412
  12. BeppoSAX GRB: extension of BSAX operations upto April 30, 2002
  13. BeppoSAX GRB ALERT: GRB010412
  14. GRB Observation Report
  15. GRB010324, revised field photometry
  16. REVISED LOCATION OF GRB010326A
  17. GRB 980326: Late-time HST/STIS observations
  18. GRB010324, field photometry
  19. GRB010326B, field photometry
  20. GRB010326, field photometry
  21. GRB010220, field photometry
  22. Further Optical Observations of GRB 010324
  23. GRB 010326A: Further optical observations
  24. GRB010324: BeppoSAX/GRBM data
  25. GRB 010326B: Optical observations
  26. GRB010324, optical observations
  27. GRB010326B: Localization by HETE (2nd GRB for this date)
  28. GRB 010326: Optical observations
  29. GRB 010326 optical observations
  30. GRB010326: Refined Localization by HETE
  31. GRB010326: Localization by HETE
  32. Duration, ECT, peak flux and fluence of GRB010324
  33. Optical Observations of GRB 010324
  34. IPN TRIANGULATION OF GRB010324
  35. GRB990705, VLT-FORS1 observations of the host galaxy
  36. GRB010222, late-time optical observation
  37. Support extension to the BeppoSAX mission
  38. GRB 010222 - HEGRA GeV/TeV Observations
  39. Congratulate Scott on the 1000th GRB Coordinates Network Circular!
  40. GRB010222: Chandra X-ray Observatory Observation
  41. GRB010222: Sub-millimeter vanishing act
  42. GRB 010222, Optical Observations
  43. GRB 010222: High-Resolution Keck Spectroscopy
  44. GRB 010214, I-band data
  45. Sub-millimeter Excess/GRB 010222
  46. GRB 010222
  47. GRB 010222 HST/Chandra TOO
  48. GRB 010222
  49. GRB010222 further R-band photometry
  50. GRB010222: R-band data
  51. GRB010222 Optical observations
  52. GRB 010222: Keck Spectroscopy
  53. GRB010214, field photometry
  54. GRB010222, field photometry
  55. GRB010222 further R-band photometry
  56. GRB010222, possible increase of optical decay slope
  57. GRB 010222 Kyoto optical observation
  58. GRB010222: fading behavior
  59. GRB 010222 BV optical observations
  60. GRB 010220: Near-IR Observations
  61. GRB010214 follow-up from Hanle
  62. GRB 010222: Near-IR Observations
  63. GRB 010222: Optical Observations
  64. GRB 010222, Decay Slope Confirmed
  65. GRB010222: Another absorption line system
  66. GRB010222: Optical decay slope
  67. GRB 010214, Optical Observations
  68. GRB010222: Sub-millimeter detection
  69. GRB010222: R-band fading behavior
  70. GRB010222: Optical Observations
  71. GRB010222, optical observations
  72. GRB010222: BeppoSAX/NFI Observations
  73. Redshift of the Optical Transient of GRB010222
  74. GRB010214B,Gamma Ray Observations
  75. GRB010222
  76. ALERT: GRB010222: the brightest GRB observed by BeppoSAX
  77. GRB 010220, simultaneous optical observations
  78. GRB010220: BeppoSAX WFC and GRBM preliminary data
  79. BeppoSAX ALERT: GRB010220
  80. GRB010214: BeppoSAX WFC and GRBM preliminary data
  81. GRB 010214: X-Ray afterglow
  82. GRB 010214, Optical Observations
  83. GRB 010214 optical observation
  84. GRB010213 Optical Observation
  85. J-Band Observation of GRB 010214.
  86. GRB010213, Near-IR observations
  87. Possible InfraRed Transient of GRB 010214.
  88. GRB010214 Optical Observation
  89. GRB010214: BeppoSAX/NFI Observations
  90. GRB010213 (HETE) TAROT observations
  91. GRB 010214, optical observations
  92. BeppoSAX ALERT: GRB010214
  93. IPN Status Report
  94. HETE Status
  95. GRB010126 opt. obs.
  96. IPN/RXTE TRIANGULATION OF GRB010126
  97. GRB010126: CONCAM crude optical limits during GRB
  98. GRB010126, TNG R-band observations
  99. IPN TRIANGULATION OF GRB010126
  100. IPN/RXTE TRIANGULATION OF GRB010126

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