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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"

41974 results found.

  1. GRB 060807: K- and R-band observations
  2. GRB060807: optical afterglow candidate
  3. GRB060806 = SGR1806-20
  4. GRB 060805B: RHESSI Spectral Fit
  5. GRB060807 - SDSS Pre-burst Observations
  6. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  7. GRB 060807, optical observation
  8. GRB 060807: Kanazawa R-band observation
  9. GRB 060807: optical limit
  10. GRB 060807: Swift detection of a burst
  11. GRB 060801: Second Epoch WSRT Radio Observations
  12. GRB060805 Liverpool Telescope observations
  13. GRB 060805: XRT Team Refined Analysis
  14. GRB 060805: Swift-BAT Refined Analysis
  15. GRB 060805: P60 Observations
  16. GRB 060805: KAIT observations
  17. GRB 060805 - SDSS Pre-Burst Observations
  18. GRB 060805: Swift detection of a burst
  19. GRB 060804: Swift UVOT observations
  20. GRB 060804: Swift-XRT Team Refined Analysis
  21. GRB 060804: Swift detection of a burst with a possible UVOT counterpart
  22. GRB 060728: Upper limits of the X-ray emission
  23. GRB 060801: no variability of optical sources
  24. GRB 060801: WSRT Radio Observations
  25. GRB 060801: XRT/SDSS Frame Offset and Refined XRT Position
  26. GRB060801: Radio Observations
  27. GRB 051109B: Bright spiral host galaxy at low redshift
  28. GRB 060801: optical observations at FORS2/VLT
  29. GRB 060801: optical observations at Hanle and Calar Alto
  30. GRB 060801: Swift XRT refined analysis
  31. GRB 060801, optical observation
  32. GRB 060801: Kanazawa Optical Observation
  33. GRB 060801: Swift detection of a short burst
  34. GRB060729: ROTSE-III Observations of the Slow Optical Decay
  35. GRB 060218 / SN 2006aj Nebular Spectrum
  36. GRB 060729 redshift
  37. GRB 060719: TORTOREM optical upper limits
  38. GRB 060729: Refined analysis of the Swift-BAT burst
  39. GRB 060729: Swift-XRT refined analysis
  40. GRB 060729: Swift/UVOT Observations
  41. GRB 060729: ROTSE-III Detection of Optical Counterpart
  42. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  43. GRB 060728: Refined analysis of the Swift-BAT burst
  44. GRB 060728, SMARTS optical/IR observations
  45. Swift/XRT preliminary analysis
  46. GRB 060728: Swift detection of a burst
  47. GRB 060218 (SN 2006aj): IR afterglow detection six months after the
  48. GRB 060714: Swift/UVOT Observations
  49. GRB060719: prompt NIR observations with REM
  50. GRB 060714: NOT observations
  51. GRB 060719: near-infrared afterglow
  52. GRB 060522: VLA observation
  53. GRB 060719: VLT/ISAAC observations
  54. GRB 060719: XRT refined analysis
  55. GRB 060719: further analysis of VLT observations
  56. GRB060719: FRAM early follow-up limit
  57. GRB 060719: prompt PROMPT observations
  58. GRB060719: REM NIR Observations
  59. GRB 060719: Continued LCO optical observations
  60. GRB 060719: VLT observations
  61. GRB 060719: LCO optical observations
  62. GRB 060719: Swift detection of a burst
  63. GRB 060717: Swift XRT refined analysis
  64. GRB 060714: OA fading and a possible host detection
  65. GRB060714: optical observations
  66. GRB 060717: NOT observations
  67. GRB 060717: Swift XRT refined position
  68. GRB060717 - SDSS Pre-burst Observations
  69. GRB 060714: REM infrared observations
  70. GRB 060717, optical observation
  71. GRB 060717: Swift detection of a burst
  72. GRB060714: optical observations
  73. GRB 060714, SMARTS optical/IR afterglow observation
  74. GRB 060714 : Liverpool Telescope Observations
  75. GRB 060714: Swift XRT refined analysis
  76. GRB 060708: VLT spectroscopy
  77. GRB060708: MARGE low resolution spectrum observations
  78. GRB060714: optical observations
  79. Swift trigger 219136 is probably not a GRB
  80. GRB 060714, optical observation
  81. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  82. GRB 060605: SkyNet Optical Limits
  83. GRB060712: P60 Observations
  84. GRB 060712: XRT refined analysis
  85. GRB 060712: Swift/UVOT Upper Limits
  86. GRB060526: optical observations
  87. GRB 060712: XRT refined position
  88. GRB 060712: Swift detection of a burst
  89. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  90. GRB 060708: PROMPT Optical Limits
  91. GRB 060707: OA fading and redshift
  92. GRB 060708: Swift-XRT refined analysis
  93. GCN 060708: Swift-UVOT Observations
  94. GCN 060707: Swift-UVOT observations
  95. GRB 060707: Swift-XRT refined analysis
  96. GRB 060708: Swift detection of a burst with an UVOT countpart
  97. GRB060707 possible optical confirmation
  98. GRB 060707: BOOTES-IR optical afterglow candidate
  99. GRB 060707: Refined analysis of the Swift-BAT burst
  100. GRB 060707: BOOTES-IR optical observation

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