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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"

32765 results found.

  1. GRB 051105: Optical limit
  2. GRB 051016B host spectroscopy and redshift
  3. GRB051016B: optical observation
  4. Konus-Wind observation of GRB 051028
  5. GRB051028:MASTER correction and final results
  6. GRB 051022: RTT150 optical observations
  7. GRB 051021A: RTT150 optical observations
  8. GRB051028 SARA Observation
  9. GRB051028: optical observations
  10. GRB051028: Swift/UVOT upper limits
  11. GRB051028: WHT optical candidate
  12. GRB051028: Swift XRT Position
  13. GRB051028:MASTER observations
  14. GRB 051022: XRT Refined Spectral and Temporal Analysis--Correction
  15. GRB051022: Swift XRT measurement of jet break
  16. GRB051021B: Swift/UVOT Upper limits
  17. GRB 051022: XRT Refined Spectral and Temporal Analysis
  18. GRB 051022, refined optical astrometry
  19. Chandra Observations of GRB 051022
  20. GRB051012: Swift-XRT analysis
  21. GRB051021B: Swift XRT refined analysis
  22. GRB051021a: optical observations
  23. GRB 051022: WSRT Radio Detection
  24. GRB 051022, mm counterpart
  25. GRB051022: host galaxy redshift
  26. GRB 051022: Swift/UVOT Upper Limits
  27. GRB051022: Radio Counterpart
  28. GRB051022: IR observations
  29. GRB 051022: SOAR JKs Observations
  30. GRB051021A: Swift XRT refined analysis
  31. Konus-Wind observation of GRB 051022
  32. GRB051022: Optical Observations
  33. GRB 051022: Magellan NIR imaging
  34. GRB 051021: PROMPT RcIc Observations
  35. GRB051021b: Magellan IR Imaging
  36. GRB 051021: Correction
  37. GRB 051022, J & K-band observation
  38. GRB 051021, SMARTS optical/IR observations
  39. GRB051022: Swift XRT Position
  40. GRB 051021: P200 Ks Observations
  41. IPN triangulation of GRB051022 (=H3950)
  42. GRB 051021: MDM Upper Limit
  43. GRB 051022 (=H3950): SXC Flight Localization is Valid
  44. GRB051021: Swift/UVOT Upper Limits
  45. GRB 051021B: Refined analysis of the Swift-BAT burst
  46. GRB 051022: SSO40 Optical Observations
  47. GRB 051022A: ROTSE-III Optical Limits
  48. GRB051022 (=H3590), A GRB Detected By HETE
  49. GRB 051022: Optical observations
  50. GRB051021B: Swift XRT Position
  51. GRB 051021: SOAR NIR Observations
  52. GRB051021: Swift XRT analysis
  53. GRB 051021 : optical afterglow observation at Lulin
  54. GRB 051021: Optical observations
  55. GRB 051021: ROTSE-III Confirmation of Optical Counterpart
  56. GRB 051021: Optical observations and candidate afterglow
  57. GRB051021: A GRB Localized by HETE
  58. GRB 050502b: Optical limit
  59. GRB 051016b: Optical limit
  60. Afterglow candidate of GRB 051016B observed at Lulin
  61. GRB 051016b: Gemini Near IR Observations
  62. GRB 051016A: Swift/UVOT upper limits
  63. GRB 051016B: refined analysis of the Swift/XRT data
  64. GRB 051016B: Swift/UVOT detection
  65. GRB 051016B : Optical follow-up at Lulin
  66. GRB 051016B: Refined analysis of the Swift-BAT burst
  67. GRB 051016: Swift-BAT refined analysis
  68. GRB051016: Planned XMM-Newton observation
  69. GRB 051016: LCO optical and near-IR imaging
  70. GRB 051016: PROMPT Observations
  71. Photometric calibration of Swift/UVOT and Re-analysis of Swift/UVOT GRB 050922C data
  72. GRB051006: optical observations
  73. Swift trigger 159578 is not a burst
  74. GRB050805A: Rc optical observations
  75. GRB 051006: Swift/UVOT Upper Limits
  76. GRB051008: optical candidate
  77. GRB 051008 - a low redshift low-luminosity burst?
  78. GRB051008: Swift XRT refined analysis
  79. GRB051008 - Swift UVOT upper limits
  80. Konus-Wind observation of GRB 051008
  81. GRB051008: Final refined analysis of the Swift-BAT burst
  82. GRB 051008: R-band upper limit
  83. GRB051008: Refined analysis of the Swift-BAT burst
  84. GRB051008: Radio Observation
  85. GRB 051008: Swift XRT position
  86. GRB 051008, optical observations
  87. GRB 051006: P60 Observations
  88. GRB 051006: XRT refined analysis
  89. GRB051006: Refined analysis of the Swift-BAT burst
  90. GRB 051006: XRT position
  91. GRB 050906, summary of radio observations
  92. Swift-BAT triggers 158261 and 158262 Retraction
  93. GRB051001: Swift UVOT Upper Limits
  94. GRB 050925: Second Epoch WSRT Radio Observations
  95. GRB 051001: Swift XRT refined analysis
  96. GRB 051001, optical observations at Mt. John
  97. GRB 051001: I-band limit
  98. GRB 051001: AAT infra-red observations
  99. GRB 051001: Swift-BAT refined analysis
  100. GRB 051001: ROTSE-III Optical Limits

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