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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"

36207 results found.

  1. GRB010324, optical observations
  2. GRB010326B: Localization by HETE (2nd GRB for this date)
  3. GRB 010326: Optical observations
  4. GRB 010326 optical observations
  5. GRB010326: Refined Localization by HETE
  6. GRB010326: Localization by HETE
  7. Duration, ECT, peak flux and fluence of GRB010324
  8. Optical Observations of GRB 010324
  9. IPN TRIANGULATION OF GRB010324
  10. GRB990705, VLT-FORS1 observations of the host galaxy
  11. GRB010222, late-time optical observation
  12. Support extension to the BeppoSAX mission
  13. GRB 010222 - HEGRA GeV/TeV Observations
  14. Congratulate Scott on the 1000th GRB Coordinates Network Circular!
  15. GRB010222: Chandra X-ray Observatory Observation
  16. GRB010222: Sub-millimeter vanishing act
  17. GRB 010222, Optical Observations
  18. GRB 010222: High-Resolution Keck Spectroscopy
  19. GRB 010214, I-band data
  20. Sub-millimeter Excess/GRB 010222
  21. GRB 010222
  22. GRB 010222 HST/Chandra TOO
  23. GRB 010222
  24. GRB010222 further R-band photometry
  25. GRB010222: R-band data
  26. GRB010222 Optical observations
  27. GRB 010222: Keck Spectroscopy
  28. GRB010214, field photometry
  29. GRB010222, field photometry
  30. GRB010222 further R-band photometry
  31. GRB010222, possible increase of optical decay slope
  32. GRB 010222 Kyoto optical observation
  33. GRB010222: fading behavior
  34. GRB 010222 BV optical observations
  35. GRB 010220: Near-IR Observations
  36. GRB010214 follow-up from Hanle
  37. GRB 010222: Near-IR Observations
  38. GRB 010222: Optical Observations
  39. GRB 010222, Decay Slope Confirmed
  40. GRB010222: Another absorption line system
  41. GRB010222: Optical decay slope
  42. GRB 010214, Optical Observations
  43. GRB010222: Sub-millimeter detection
  44. GRB010222: R-band fading behavior
  45. GRB010222: Optical Observations
  46. GRB010222, optical observations
  47. GRB010222: BeppoSAX/NFI Observations
  48. Redshift of the Optical Transient of GRB010222
  49. GRB010214B,Gamma Ray Observations
  50. GRB010222
  51. ALERT: GRB010222: the brightest GRB observed by BeppoSAX
  52. GRB 010220, simultaneous optical observations
  53. GRB010220: BeppoSAX WFC and GRBM preliminary data
  54. BeppoSAX ALERT: GRB010220
  55. GRB010214: BeppoSAX WFC and GRBM preliminary data
  56. GRB 010214: X-Ray afterglow
  57. GRB 010214, Optical Observations
  58. GRB 010214 optical observation
  59. GRB010213 Optical Observation
  60. J-Band Observation of GRB 010214.
  61. GRB010213, Near-IR observations
  62. Possible InfraRed Transient of GRB 010214.
  63. GRB010214 Optical Observation
  64. GRB010214: BeppoSAX/NFI Observations
  65. GRB010213 (HETE) TAROT observations
  66. GRB 010214, optical observations
  67. BeppoSAX ALERT: GRB010214
  68. IPN Status Report
  69. HETE Status
  70. GRB010126 opt. obs.
  71. IPN/RXTE TRIANGULATION OF GRB010126
  72. GRB010126: CONCAM crude optical limits during GRB
  73. GRB010126, TNG R-band observations
  74. IPN TRIANGULATION OF GRB010126
  75. IPN/RXTE TRIANGULATION OF GRB010126
  76. GRB 010119, optical observations
  77. GRB010119: Optical observations
  78. Optical Observations of GRB 001018 at Keck
  79. IPN TRIANGULATION OF GRB010119 (SHORT/HARD)
  80. Optical observations of GRB 001018 with JCAM
  81. IPN TRIANGULATION OF GRB010115
  82. IPN TRIANGULATION OF GRB010109
  83. GRB010103, optical observations
  84. IPN triangulation of GRB010104
  85. IPN triangulation of GRB010103
  86. GRB 001204: Ks observations
  87. H band observation of GRB 001212
  88. GRB & BeppoSAX: ground operations restored back to 24 hrs a day
  89. IPN triangulation of GRB001219
  90. GRB 001212 Optical Observation
  91. GRB 001212 Optical Observation
  92. GRB 001212 optical observation
  93. GRB 001212 possible OA in 2MASS
  94. GRB 001212 possible OA
  95. IPN triangulation of GRB001212
  96. Confirmation of IPN position for GRB001204
  97. IPN triangulation of GRB001204 (short/hard)
  98. GRB 001105, further optical observations
  99. GRB001120: Gunn-i observations
  100. GRB001120: Optical observations

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