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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"

42848 results found.

  1. GRB 060807: Refined analysis of the Swift-BAT burst
  2. GRB060807: optical afterglow candidate
  3. GRB060806 = SGR1806-20
  4. GRB 060805B: RHESSI Spectral Fit
  5. IPN triangulation of GRB060806 (long, exceptionally bright)
  6. GRB060807 - SDSS Pre-burst Observations
  7. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  8. GRB 060807: Kanazawa R-band observation
  9. GRB 060807: optical limit
  10. GRB 060807: Swift detection of a burst
  11. IPN triangulation of GRB060805B
  12. GRB060805 Liverpool Telescope observations
  13. GRB 060805: XRT Team Refined Analysis
  14. GRB 060805: Swift-BAT Refined Analysis
  15. GRB 060805: Swift/UVOT Upper Limits
  16. GRB 060805: P60 Observations
  17. GRB 060805: KAIT observations
  18. GRB 060805 - SDSS Pre-Burst Observations
  19. GRB 060805: Swift detection of a burst
  20. GRB 060804: Swift UVOT observations
  21. GRB 060804: Swift-XRT Team Refined Analysis
  22. GRB 060804: Refined analysis of the Swift-BAT burst
  23. GRB 060804: Swift detection of a burst with a possible UVOT counterpart
  24. GRB 060728: Upper limits of the X-ray emission
  25. GRB 060801: no variability of optical sources
  26. IBAS Alert 3418: not a GRB
  27. GRB 060801: WSRT Radio Observations
  28. GRB 060801: XRT/SDSS Frame Offset and Refined XRT Position
  29. GRB060801: Radio Observations
  30. GRB 051109B: Bright spiral host galaxy at low redshift
  31. GRB 060801: optical observations at FORS2/VLT
  32. GRB060801: Swift/UVOT Upper Limits
  33. GRB 060801: optical observations at Hanle and Calar Alto
  34. GRB 060801: Swift XRT refined analysis
  35. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  36. GRB 060801: Swift detection of a short burst
  37. GRB060729: ROTSE-III Observations of the Slow Optical Decay
  38. GRB 060218 / SN 2006aj Nebular Spectrum
  39. IBAS Alert n. 3415: not a GRB
  40. GRB 060729 redshift
  41. GRB 060719: TORTOREM optical upper limits
  42. GRB 060729: Swift/UVOT Detections
  43. GRB 060729: Refined analysis of the Swift-BAT burst
  44. GRB 060729: Swift-XRT refined analysis
  45. GRB 060729: Swift/UVOT Observations
  46. GRB 060729: ROTSE-III Detection of Optical Counterpart
  47. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  48. GRB 060728: Swift/UVOT Upper Limits
  49. GRB 060728: Refined analysis of the Swift-BAT burst
  50. GRB 060728, SMARTS optical/IR observations
  51. Swift/XRT preliminary analysis
  52. GRB 060728: Swift detection of a burst
  53. GRB060614 ATCA Radio Limits
  54. GRB 060218 (SN 2006aj): IR afterglow detection six months after the
  55. GRB 060714: Swift/UVOT Observations
  56. GRB060719: prompt NIR observations with REM
  57. GRB 060714: NOT observations
  58. GRB 060719: near-infrared afterglow
  59. GRB 060719: correction to the coordinates reported in GCN 5347
  60. GRB 060522: VLA observation
  61. GRB 060719: Swift/UVOT Upper Limits
  62. GRB 060719: VLT/ISAAC observations
  63. GRB 060719: Refined analysis of the Swift-BAT burst
  64. GRB 060719: XRT refined analysis
  65. GRB 060719: further analysis of VLT observations
  66. GRB 060719: optical limit by Pi-of-the-Sky
  67. GRB060719: FRAM early follow-up limit
  68. GRB 060719: prompt PROMPT observations
  69. GRB060719: REM NIR Observations
  70. GRB 060719: Continued LCO optical observations
  71. GRB 060719: VLT observations
  72. GRB 060719: LCO optical observations
  73. GRB 060719: Swift detection of a burst
  74. GRB 060717: Swift XRT refined analysis
  75. GRB 060714: OA fading and a possible host detection
  76. GRB 060717: NOT observations
  77. GRB 060714: Refined analysis of the Swift-BAT burst
  78. GRB060717: Swift/UVOT upper limits
  79. GRB 060717: Swift XRT refined position
  80. GRB 060717: Swift-BAT refined analysis
  81. GRB060717 - SDSS Pre-burst Observations
  82. GRB 060714: REM infrared observations
  83. GRB 060717: Swift detection of a burst
  84. GRB 060714, SMARTS optical/IR afterglow observation
  85. GRB 060714 : Liverpool Telescope Observations
  86. GRB 060714: Swift XRT refined analysis
  87. GRB 060714: OA redshift
  88. GRB 060708: VLT spectroscopy
  89. GRB060708: MARGE low resolution spectrum observations
  90. GRB060714: optical observations
  91. GRB060707 possible optical confirmation
  92. Swift trigger 219136 is probably not a GRB
  93. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  94. GRB 060605: SkyNet Optical Limits
  95. GRB060712: P60 Observations
  96. GRB060526: optical observations
  97. GRB 060712: XRT refined position
  98. GRB 060712: Refined analysis of the Swift-BAT burst
  99. GRB060712: MASTER optical observation
  100. GRB120706: MASTER optical observation

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