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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"

36211 results found.

  1. Further Optical Observations of GRB 010324
  2. GRB 010326A: Further optical observations
  3. GRB010324: BeppoSAX/GRBM data
  4. GRB 010326B: Optical observations
  5. GRB010324, optical observations
  6. GRB010326B: Localization by HETE (2nd GRB for this date)
  7. GRB 010326: Optical observations
  8. GRB 010326 optical observations
  9. GRB010326: Refined Localization by HETE
  10. GRB010326: Localization by HETE
  11. Duration, ECT, peak flux and fluence of GRB010324
  12. Optical Observations of GRB 010324
  13. IPN TRIANGULATION OF GRB010324
  14. GRB990705, VLT-FORS1 observations of the host galaxy
  15. GRB010222, late-time optical observation
  16. Support extension to the BeppoSAX mission
  17. GRB 010222 - HEGRA GeV/TeV Observations
  18. Congratulate Scott on the 1000th GRB Coordinates Network Circular!
  19. GRB010222: Chandra X-ray Observatory Observation
  20. GRB010222: Sub-millimeter vanishing act
  21. GRB 010222, Optical Observations
  22. GRB 010222: High-Resolution Keck Spectroscopy
  23. GRB 010214, I-band data
  24. Sub-millimeter Excess/GRB 010222
  25. GRB 010222
  26. GRB 010222 HST/Chandra TOO
  27. GRB 010222
  28. GRB010222 further R-band photometry
  29. GRB010222: R-band data
  30. GRB010222 Optical observations
  31. GRB 010222: Keck Spectroscopy
  32. GRB010214, field photometry
  33. GRB010222, field photometry
  34. GRB010222 further R-band photometry
  35. GRB010222, possible increase of optical decay slope
  36. GRB 010222 Kyoto optical observation
  37. GRB010222: fading behavior
  38. GRB 010222 BV optical observations
  39. GRB 010220: Near-IR Observations
  40. GRB010214 follow-up from Hanle
  41. GRB 010222: Near-IR Observations
  42. GRB 010222: Optical Observations
  43. GRB 010222, Decay Slope Confirmed
  44. GRB010222: Another absorption line system
  45. GRB010222: Optical decay slope
  46. GRB 010214, Optical Observations
  47. GRB010222: Sub-millimeter detection
  48. GRB010222: R-band fading behavior
  49. GRB010222: Optical Observations
  50. GRB010222, optical observations
  51. GRB010222: BeppoSAX/NFI Observations
  52. Redshift of the Optical Transient of GRB010222
  53. GRB010214B,Gamma Ray Observations
  54. GRB010222
  55. ALERT: GRB010222: the brightest GRB observed by BeppoSAX
  56. GRB 010220, simultaneous optical observations
  57. GRB010220: BeppoSAX WFC and GRBM preliminary data
  58. BeppoSAX ALERT: GRB010220
  59. GRB010214: BeppoSAX WFC and GRBM preliminary data
  60. GRB 010214: X-Ray afterglow
  61. GRB 010214, Optical Observations
  62. GRB 010214 optical observation
  63. GRB010213 Optical Observation
  64. J-Band Observation of GRB 010214.
  65. GRB010213, Near-IR observations
  66. Possible InfraRed Transient of GRB 010214.
  67. GRB010214 Optical Observation
  68. GRB010214: BeppoSAX/NFI Observations
  69. GRB010213 (HETE) TAROT observations
  70. GRB 010214, optical observations
  71. BeppoSAX ALERT: GRB010214
  72. IPN Status Report
  73. HETE Status
  74. GRB010126 opt. obs.
  75. IPN/RXTE TRIANGULATION OF GRB010126
  76. GRB010126: CONCAM crude optical limits during GRB
  77. GRB010126, TNG R-band observations
  78. IPN TRIANGULATION OF GRB010126
  79. IPN/RXTE TRIANGULATION OF GRB010126
  80. GRB 010119, optical observations
  81. GRB010119: Optical observations
  82. Optical Observations of GRB 001018 at Keck
  83. IPN TRIANGULATION OF GRB010119 (SHORT/HARD)
  84. Optical observations of GRB 001018 with JCAM
  85. IPN TRIANGULATION OF GRB010115
  86. IPN TRIANGULATION OF GRB010109
  87. GRB010103, optical observations
  88. IPN triangulation of GRB010104
  89. IPN triangulation of GRB010103
  90. GRB 001204: Ks observations
  91. H band observation of GRB 001212
  92. GRB & BeppoSAX: ground operations restored back to 24 hrs a day
  93. IPN triangulation of GRB001219
  94. GRB 001212 Optical Observation
  95. GRB 001212 Optical Observation
  96. GRB 001212 optical observation
  97. GRB 001212 possible OA in 2MASS
  98. GRB 001212 possible OA
  99. IPN triangulation of GRB001212
  100. Confirmation of IPN position for GRB001204

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