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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"

21828 results found.

  1. GRB010222, field photometry
  2. GRB010222 further R-band photometry
  3. GRB010222, possible increase of optical decay slope
  4. GRB 010222 BV optical observations
  5. GRB010220, Optical Observations
  6. GRB010222 R-BAND OBSERVATION
  7. GRB 010220: Near-IR Observations
  8. GRB010214 follow-up from Hanle
  9. GRB 010222: Near-IR Observations
  10. GRB 010222: Optical Observations
  11. GRB010222: Optical decay slope
  12. GRB 010214, Optical Observations
  13. GRB010222: Sub-millimeter detection
  14. GRB010222: R-band fading behavior
  15. GRB010222: Optical Observations
  16. GRB010222, radio observations
  17. GRB010222, optical observations
  18. GRB010222: BeppoSAX/NFI Observations
  19. Redshift of the Optical Transient of GRB010222
  20. GRB010214B,Gamma Ray Observations
  21. GRB010222
  22. GRB010220, Radio and Optical Observations
  23. GRB 010220, simultaneous optical observations
  24. GRB010214, candidate optical afterglow
  25. GRB010214, optical observations
  26. GRB 010214, Optical Observations
  27. GRB010213, Radio Observations
  28. GRB010213 Optical Observation
  29. GRB010213, Radio Observations
  30. J-Band Observation of GRB 010214.
  31. GRB010214, Radio Observations
  32. GRB010214, optical observations
  33. GRB010213, optical observations
  34. GRB010213, Near-IR observations
  35. Possible InfraRed Transient of GRB 010214.
  36. GRB010214 Optical Observation
  37. GRB010214: BeppoSAX/NFI Observations
  38. GRB010213 (HETE) TAROT observations
  39. GRB 010214, optical observations
  40. GRB010213 detected by HETE
  41. GRB010126, TNG R-band observations
  42. GRB010126 Optical Observations
  43. GRB010126 optical observations
  44. GRB010126: Optical observations
  45. GRB 010119, optical observations
  46. GRB010119: Optical observations
  47. Optical Observations of GRB 001018 at Keck
  48. GRB010119, Radio observations
  49. Optical observations of GRB 001018 with JCAM
  50. GRB010103, optical observations
  51. GRB 001204: Ks observations
  52. H band observation of GRB 001212
  53. GRB 001212 possible OA
  54. GRB001204: Optical observations
  55. GRB001204, Radio observations
  56. GRB 001105, further optical observations
  57. GRB001120: Gunn-i observations
  58. GRB001120: Optical observations
  59. GRB001109, optical observations
  60. GRB001120, optical observations
  61. WSRT 4.8 GHz observations of GRB001109
  62. Optical/NIR observations of GRB001109
  63. GRB 001109: deep JHK upper limits
  64. GRB001109: Optical observations
  65. GRB001109: BeppoSAX/NFI Observations
  66. GRB001109, R-band optical observations
  67. GRB001109, Radio observations
  68. GRB 991208: HST Imaging of the Host Galaxy
  69. GRB000926: R-image of the host galaxy
  70. GRB 001025B, I-band observations
  71. GRB001025B, Radio observations
  72. GRB 001025 Optical Observations
  73. GRB001007: Optical observations
  74. GRB001007, Radio observations
  75. GRB001019, Optical Observations
  76. GRB 001018, Possible Radio Afterglow
  77. GRB001018, Gamma Ray Observations
  78. V,R,I band observations of GRB000926
  79. The Likely Optical/Infrared Afterglow of GRB 001011
  80. GRB 001007, BVR-band observations
  81. GRB000926 - Amateur Optical Observations
  82. GRB001007: Optical observations
  83. GRB 000926 : the host galaxy
  84. HETE-2 Launches Successfully
  85. GRB 000926 Chandra Observation
  86. GRB000926: X-ray afterglow by BeppoSAX. Refined analysis
  87. GRB000926 - Optical observations
  88. GRB000926 - Optical observations
  89. GRB000926 - Optical observations
  90. GRB000926 - Optical observations
  91. GRB 000926: optical observations
  92. GRB 000926, Optical Observations
  93. GRB000926 - Optical observations
  94. GRB000911: optical VLT observations
  95. GRB000926 K'-band Observation
  96. GRB000926 optical observations
  97. GRB000926 - Optical observations
  98. J and K band observations of GRB 000926
  99. GRB000911 Optical Observations
  100. GRB000926: X-ray afterglow by BeppoSAX & plan of BSAX & Chandra obs.

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