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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"

22194 results found.

  1. GRB990705, VLT-FORS1 observations of the host galaxy
  2. GRB 010222 - HEGRA GeV/TeV Observations
  3. GRB010222: Sub-millimeter vanishing act
  4. GRB 010222, Optical Observations
  5. GRB 010214, I-band data
  6. Sub-millimeter Excess/GRB 010222
  7. GRB 010222
  8. GRB 010222 HST/Chandra TOO
  9. GRB010222 further R-band photometry
  10. GRB010222 Optical observations
  11. GRB010222, field photometry
  12. GRB010222 further R-band photometry
  13. GRB010222, possible increase of optical decay slope
  14. GRB 010222 BV optical observations
  15. GRB010220, Optical Observations
  16. GRB010222 R-BAND OBSERVATION
  17. GRB 010220: Near-IR Observations
  18. GRB010214 follow-up from Hanle
  19. GRB 010222: Near-IR Observations
  20. GRB 010222: Optical Observations
  21. GRB010222: Optical decay slope
  22. GRB 010214, Optical Observations
  23. GRB010222: Sub-millimeter detection
  24. GRB010222: R-band fading behavior
  25. GRB010222: Optical Observations
  26. GRB010222, radio observations
  27. GRB010222, optical observations
  28. GRB010222: BeppoSAX/NFI Observations
  29. GRB010214B,Gamma Ray Observations
  30. GRB010222
  31. GRB010220, Radio and Optical Observations
  32. GRB 010220, simultaneous optical observations
  33. GRB010214, candidate optical afterglow
  34. GRB010214, optical observations
  35. GRB 010214, Optical Observations
  36. GRB010213, Radio Observations
  37. GRB010213 Optical Observation
  38. GRB010213, Radio Observations
  39. J-Band Observation of GRB 010214.
  40. GRB010214, Radio Observations
  41. GRB010214, optical observations
  42. GRB010213, optical observations
  43. GRB010213, Near-IR observations
  44. Possible InfraRed Transient of GRB 010214.
  45. GRB010214 Optical Observation
  46. GRB010214: BeppoSAX/NFI Observations
  47. GRB010213 (HETE) TAROT observations
  48. GRB 010214, optical observations
  49. GRB010213 detected by HETE
  50. IPN Status Report
  51. IPN/RXTE TRIANGULATION OF GRB010126
  52. GRB010126, TNG R-band observations
  53. GRB010126 Optical Observations
  54. GRB010126 optical observations
  55. GRB010126: Optical observations
  56. IPN TRIANGULATION OF GRB010126
  57. IPN/RXTE TRIANGULATION OF GRB010126
  58. GRB 010119, optical observations
  59. GRB010119: Optical observations
  60. Optical Observations of GRB 001018 at Keck
  61. GRB010119, Radio observations
  62. IPN TRIANGULATION OF GRB010119 (SHORT/HARD)
  63. Optical observations of GRB 001018 with JCAM
  64. IPN TRIANGULATION OF GRB010115
  65. IPN TRIANGULATION OF GRB010109
  66. GRB010103, optical observations
  67. IPN triangulation of GRB010104
  68. IPN triangulation of GRB010103
  69. GRB 001204: Ks observations
  70. H band observation of GRB 001212
  71. IPN triangulation of GRB001219
  72. GRB 001212 possible OA in 2MASS
  73. GRB 001212 possible OA
  74. IPN triangulation of GRB001212
  75. GRB001204: Optical observations
  76. Confirmation of IPN position for GRB001204
  77. GRB001204, Radio observations
  78. IPN triangulation of GRB001204 (short/hard)
  79. GRB 001105, further optical observations
  80. GRB001120: Gunn-i observations
  81. GRB001120: Optical observations
  82. GRB001109, optical observations
  83. GRB001120, optical observations
  84. WSRT 4.8 GHz observations of GRB001109
  85. IPN triangulation of GRB001120
  86. Optical/NIR observations of GRB001109
  87. GRB 001109: deep JHK upper limits
  88. GRB001109: Optical observations
  89. GRB001109: BeppoSAX/NFI Observations
  90. GRB001109, R-band optical observations
  91. GRB001109, Radio observations
  92. IPN TRIANGULATION OF GRB001105
  93. GRB000926: R-image of the host galaxy
  94. GRB 001025B, I-band observations
  95. GRB001025B, Radio observations
  96. GRB 001025 Optical Observations
  97. IPN TRIANGULATION OF GRB001025B (SHORT/HARD)
  98. IPN triangulation of GRB001025
  99. GRB001007: Optical observations
  100. ASM Localization of GRB 001025

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