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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"

32769 results found.

  1. GRB 060807: afterglow confirmation
  2. GRB 060807: K- and R-band observations
  3. GRB 060807: Refined analysis of the Swift-BAT burst
  4. GRB060806 = SGR1806-20
  5. GRB 060805B: RHESSI Spectral Fit
  6. GRB060807: optical upper limit in white light
  7. IPN triangulation of GRB060806 (long, exceptionally bright)
  8. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  9. GRB 060805B: Swift/UVOT Upper Limits
  10. GRB 060807, optical observation
  11. GRB 060807: Kanazawa R-band observation
  12. GRB 060807: optical limit
  13. GRB 060807: Swift detection of a burst
  14. GRB 060801: Second Epoch WSRT Radio Observations
  15. IPN triangulation of GRB060805B
  16. GRB060805 Liverpool Telescope observations
  17. GRB 060805: optical upper limit in R
  18. GRB 060805: XRT Team Refined Analysis
  19. GRB 060805: Swift-BAT Refined Analysis
  20. GRB 060805: Swift/UVOT Upper Limits
  21. GRB 060805: P60 Observations
  22. GRB 060805: KAIT observations
  23. GRB 060804: Swift UVOT observations
  24. GRB 060804: Swift-XRT Team Refined Analysis
  25. GRB 060804: Refined analysis of the Swift-BAT burst
  26. GRB 060728: Upper limits of the X-ray emission
  27. GRB 060801: no variability of optical sources
  28. GRB 060801: WSRT Radio Observations
  29. GRB 060801: XRT/SDSS Frame Offset and Refined XRT Position
  30. GRB060801: Radio Observations
  31. GRB 051109B: Bright spiral host galaxy at low redshift
  32. GRB 060801: optical observations at FORS2/VLT
  33. GRB060801: Swift/UVOT Upper Limits
  34. GRB 060801: optical observations at Hanle and Calar Alto
  35. GRB060801: optical upper limit in R
  36. GRB 060801: Swift XRT refined analysis
  37. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  38. GRB 060801, optical observation
  39. GRB 060801: Kanazawa Optical Observation
  40. GRB060729: ROTSE-III Observations of the Slow Optical Decay
  41. GRB 060218 / SN 2006aj Nebular Spectrum
  42. GRB 060729 redshift
  43. GRB 060719: TORTOREM optical upper limits
  44. GRB 060729: Swift/UVOT Detections
  45. GRB 060729: Refined analysis of the Swift-BAT burst
  46. GRB 060729: Swift-XRT refined analysis
  47. GRB 060729: Swift/UVOT Observations
  48. GRB 060729: ROTSE-III Detection of Optical Counterpart
  49. GRB 060728: Swift/UVOT Upper Limits
  50. GRB 060728: Refined analysis of the Swift-BAT burst
  51. GRB 060728, SMARTS optical/IR observations
  52. Swift/XRT preliminary analysis
  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: prompt PROMPT observations
  67. GRB060719: REM NIR Observations
  68. GRB 060719: Continued LCO optical observations
  69. GRB 060719: VLT observations
  70. GRB 060717: Swift XRT refined analysis
  71. GRB 060714: OA fading and a possible host detection
  72. GRB 060717: NOT observations
  73. GRB 060714: Refined analysis of the Swift-BAT burst
  74. GRB 060717 optical upper limit
  75. GRB060717: Swift/UVOT upper limits
  76. GRB 060717: Swift XRT refined position
  77. GRB 060717: Swift-BAT refined analysis
  78. GRB060717 - SDSS Pre-burst Observations
  79. GRB 060714: REM infrared observations
  80. GRB 060717, optical observation
  81. GRB060714: correction to GCN 5324
  82. GRB 060714, SMARTS optical/IR afterglow observation
  83. GRB 060714 : Liverpool Telescope Observations
  84. GRB 060714: Swift XRT refined analysis
  85. GRB 060714: OA redshift
  86. GRB 060708: VLT spectroscopy
  87. GRB060708: MARGE low resolution spectrum observations
  88. Swift-BAT trigger 219136 is not a GRB
  89. Correction to Circular 5314: Circular refers to GRB 060714
  90. GRB060707 possible optical confirmation
  91. GRB 060714, optical observation
  92. GRB 060605: SkyNet Optical Limits
  93. GRB060712: P60 Observations
  94. GRB 060712: Swift/UVOT Upper Limits
  95. GRB 060712: Refined analysis of the Swift-BAT burst
  96. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  97. GRB 060708: PROMPT Optical Limits
  98. GRB 060707: OA fading and redshift
  99. GRB 060708: Swift-XRT refined analysis
  100. GCN 060708: Swift-UVOT Observations

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