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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"

42872 results found.

  1. GRB 050802: Swift Gamma-ray Burst
  2. GRB050801: Swift/UVOT Optical and UV detections
  3. GRB 050730: Preliminary Analysis of MIKE Spectrum
  4. GCN 050801: early Swift XRT analysis results
  5. GRB 050801: Swift-BAT refined analysis
  6. GRB 050801, SMARTS optical/IR afterglow observations
  7. GRB 050801, afterglow observations
  8. GRB 050730, corrected photometry and break?
  9. GRB 050801: ROTSE-III Early Afterglow Break
  10. GRB050801: Swift-BAT detection of a burst
  11. GRB050801: GCN XRT position is incorrect
  12. GRB 050801: ROTSE-III Detection of Possible Counterpart
  13. GRB 050730: XRT refined analysis
  14. Correction to GCN Circ 3476 on GRB050525A
  15. GRB 050730: early TAROT optical observations
  16. GRB 050730: RTT150 optical observations
  17. Swift/UVOT photometry of GRB050730
  18. GRB 050730, spectra and optical photometry
  19. GRB050730: Refined BAT analysis of the Swift-BAT burst
  20. GRB 050730: Swift XRT afterglow observations
  21. GRB 050730 XMM-Newton observation
  22. GRB 050730: PROMPT VRcIc Observations
  23. GRB050730, afterglow observations
  24. GRB050730: confirmation of redshift
  25. GRB 050730: Redshift Measurement based on Magellan/MIKE Observations
  26. GRB 050730, SMARTS optical/IR afterglow observations
  27. GRB050730: Liverpool Telescope optical observations
  28. GRB 050730, optical candidate
  29. GRB050730: Swift-BAT detection of a weak burst
  30. GRB 050713A: Swift XRT extended light curve
  31. GRB 050709: PROMPT Rc Observations
  32. GRB 050724: Secure Host Redshift from Keck
  33. GRB 050724: WHT optical observations
  34. GRB050726: Swift UVOT observations
  35. GRB 050724: Chandra Observations of the X-ray Afterglow
  36. GRB050724: Refined Radio Position
  37. GRB050713: analysis of the XMM-Newton observation
  38. GRB 050724, SMARTS optical/IR afterglow observations
  39. GRB 050726, SMARTS optical/IR observations
  40. Swift-BAT trigger 147918 is not a real GRB
  41. GRB 050727: RTT150 optical observations
  42. GRB050724: VLT observations of the variable source
  43. GRB050727: KAIT optical limit
  44. GRB050709: Second Epoch Chandra Observation
  45. GRB 050726: PROMPT Rc Observations
  46. GRB050709: Second Epoch Chandra Observation
  47. GRB 050724: dust-scattered X-ray halo detected in SWIFT/XRT observation
  48. GRB050724: Further Radio Observations
  49. GRB 050726: early Swift XRT analysis results
  50. GRB050726: Swift-BAT detection of a weak burst
  51. GRB 050724: Optical Variability in Nearby Galaxy
  52. GRB 050724: J-band observations
  53. GRB 050724: GMOS Imaging and Spectroscopy
  54. GRB 050724: SWIFT XRT refined position
  55. RXTE ASM Detection of GRB050724
  56. GRB050724: Radio Observation
  57. GRB 050724: spectroscopy of object in the XRT error circle
  58. GRB 050724: optical and near-IR observations
  59. GRB 050724: Optical imaging/astrometry
  60. GRB 050724: RTT150 optical observations
  61. GRB 050724: Swift/UVOT Upper Limit
  62. GRB 050724: early Swift XRT analysis results
  63. GRB 050724 : Lulin early R-band monitoring observations
  64. GRB050724: Refined analysis of the Swift-BAT possible short burst
  65. GRB 050724: possible host galaxy in DSS
  66. GRB050724: a short-burst detected by Swift
  67. Swift-BAT trigger 147325 is not due to a real GRB
  68. GRB050723: XRT distributed coordinates are not related to the burst
  69. GRB 050721: early afterglow light curve
  70. GRB 050721A: Swift-BAT refined analysis
  71. GRB 050721A: Early Swift XRT analysis results
  72. GRB050721A: optical decay
  73. GRB 050721: optical afterglow confirmed
  74. Swift BAT Trigger 146986 is SWIFT J1753.5-0127
  75. GRB 050721a: Optical Observations
  76. GRB050721A: Swift-BAT detection of a weak burst
  77. GRB 050709: Refined Spectral and Temporal Properties
  78. GRB 050717: PROMPT RcIc Observations
  79. GRB050714b: Radio Observation
  80. GRB050712: Radio Observations
  81. GRB 050714a: Refined XRT analysis and afterglow confirmation
  82. GRB050713a: Radio Observation
  83. Swift-BAT trigger 146731 is not a real GRB
  84. GRB 050712, Tautenburg optical afterglow observations
  85. Swift-BAT detection of a possible GRB
  86. GRB 050717: Additional LCO observations
  87. GRB 050716; J-band observations
  88. Konus-Wind observation of GRB 050717
  89. GRB 050717: LCO near-IR observations
  90. Swift/UVOT Observations of GRB 050717
  91. GRB 050717: Swift-BAT refined analysis
  92. GRB 050717: Refined XRT analysis.
  93. GRB050717: Swift XRT position
  94. Swift detection of GRB 050717
  95. GRB 050716 - UKIRT identification of candidate afterglow
  96. GRB 050716: Refined XRT analysis.
  97. GRB050716: Refined analysis of the Swift-BAT burst
  98. GRB050716: Faulkes North Telescope observation
  99. GRB050716: Correction to sign in XRT coordinate
  100. Swift/BAT detection of GRB 050716

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