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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"

21854 results found.

  1. GRB050223: No Swift UVOT Detection of Afterglow Emission
  2. GRB050223: ROTSE-III Optical Observations
  3. GRB 050223: Swift XRT Position
  4. HETE-2 Observations of GRB 050215b (=U11570): A Likely X-Ray Flash
  5. GRB050219b: CORRECTION to time of UVOT observations
  6. GRB050215b: Faulkes North and SDSS limits on UKIRT candidate
  7. GRB050219b: No Swift UVOT Detection of Afterglow Emission
  8. GRB 050219a: Optical observations from LCO
  9. GRB 050219b: Optical and near-IR observations from LCO
  10. GRB050219b: No Swift UVOT Detection of Afterglow Emission
  11. GRB 050219b: CORRECTION: Swift XRT Position
  12. GRB 050219b: Swift XRT Position
  13. GRB 050219a, optical observations
  14. GRB 050219a: Refined XRT position
  15. GRB050219a: No Swift UVOT Detection of Afterglow Emission
  16. GRB050215b: Swift UVOT Detection of Afterglow Emission
  17. GRB 050215B: Radio Observations
  18. GRB 050215b: XRT confirmation of IR afterglow candidate
  19. GRB050215b: P60 Optical Observations
  20. GRB 050215b: Swift XRT Source Variability
  21. GRB 050215b : Lulin follow-up observation
  22. GRB 050215b, BOOTES-2 simultaneous optical observations
  23. GRB 050215b: Swift XRT Observations
  24. GRB050215b: No Swift UVOT Detection of Afterglow Emission
  25. GRB050215a: No Swift UVOT Detection of Afterglow Emission
  26. Swift-BAT detects two bursts: GRB050215a and GRB050215b
  27. GRB050215B: ROTSE-III optical observations
  28. GRB050215A: ROTSE-III Optical Observations
  29. GRB050209: TAROT optical observations
  30. short/hard GRB 050202, optical observations
  31. GRB050209: REM optical observations
  32. GRB 050209 Optical observations
  33. GRB050209: P60 Optical Observations
  34. GRB 050128: Radio observations
  35. GRB 050202: Second epoch radio observations
  36. GRB 050129: Optical observations
  37. GRB050202: Radio Observations
  38. GRB 050202: Optical observations with LCO40
  39. GRB 050128 Optical observation with REM
  40. GRB050128: Faulkes Telescope South observations
  41. GRB 050124: Radio Observations
  42. GRB 050128: near-infrared observations with REM
  43. GRB050128,optical observations
  44. GRB 050126: A NIR afterglow candidate in the revised XRT error circle
  45. GRB 050126: Radio Observations
  46. GRB050128 Swift-BAT observations
  47. GRB 050128: Swift XRT prompt afterglow position
  48. HETE #3667: P60 Observations
  49. GRB 050124: K-band afterglow observations
  50. GRB050126: MASTER optical observations
  51. GRB 050126: Prompt XRT detection and localization
  52. GRB050124: No Swift UVOT Detection of Afterglow Emission
  53. GRB 050124, SMARTS optical/IR observations
  54. GRB 050117a: Radio Observations
  55. GRB 050124: NIR Candidates from Keck/NIRC
  56. GRB 050124 : Lulin R-band follow-up observation
  57. GRB050124: Updated Swift XRT Position and Fluxes
  58. GRB 050124: Swift XRT Detection of X-ray Afterglow Emission
  59. GRB 050123 : I-band follow-up observation
  60. GRB 050123: KAIT observations
  61. GRB050123: P60 Observations
  62. CFHTLS optical transient unlikely to be a GRB
  63. GRB050117a: Radio Observations
  64. GRB 041224 and GRB 041226: BOOTES-2 simultaneous observations
  65. GRB050117: Palomar WIRC Ks-band observations
  66. GRB 050117, I-band observations
  67. GRB050117: Refined XRT position
  68. GRB050117: MASTER optical observations
  69. MASTER:GRB050117 SWIFT
  70. SGR 1806-20: Further VLA Observations
  71. SGR 1806-20: Further low frequency GMRT results
  72. SGR 1806-20: Further VLA Observations
  73. SGR1806-20: Swift-BAT observations of two additional bursts
  74. Further VLA observations of SGR 1806-20
  75. Further ATCA observations of SGR 1806-20
  76. Fourth Epoch VLA observations of SGR 1806-20
  77. SGR 1806-20: Low frequency GMRT results; submission to GCN circulars
  78. ATCA observations of SGR 1806-20
  79. SGR 1806-20, RHESSI observations of the 041227 giant flare
  80. Third epoch observations of SGR 1806-20 with VLA
  81. Second Epoch VLA observations of SGR 1806-20
  82. Second-epoch VLA observations of SGR 1806-20
  83. SGR1806: Detection of a Sudden Ionospheric Disturbance
  84. VLA observations of SGR 1806-20
  85. SGR1806 VLA Observations
  86. VLA observations of SGR 1806-20
  87. GRB 041217: Optical observations
  88. GRB041219, early time observations
  89. The giant outburst from SGR 1806-20
  90. GRB041228: ROTSE-III Optical Observations
  91. GRB041219; RXTE ASM Observations
  92. NIR Observations of GRB 041219
  93. GRB041226: ROTSE-III Optical Observations
  94. GRB041223: decay of the afterglow
  95. GRB041224: ROTSE-III Optical Observations
  96. GRB 041224: near-infrared observations with REM
  97. GRB041223: optical and NIR observations with REM
  98. Swift-BAT Time History of GRB041219
  99. GRB 041219: TAROT optical observations
  100. GRB 041218: TAROT optical observations

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