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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"

28096 results found.

  1. GRB060805 Liverpool Telescope observations
  2. GRB 060805: XRT Team Refined Analysis
  3. GRB 060805: Swift-BAT Refined Analysis
  4. GRB 060805: Swift/UVOT Upper Limits
  5. GRB 060805: P60 Observations
  6. GRB 060805 - SDSS Pre-Burst Observations
  7. GRB 060804: Swift UVOT observations
  8. GRB 060804: Swift-XRT Team Refined Analysis
  9. GRB 060804: Refined analysis of the Swift-BAT burst
  10. GRB 060804: Swift detection of a burst with a possible UVOT counterpart
  11. GRB 060728: Upper limits of the X-ray emission
  12. GRB 060801: no variability of optical sources
  13. GRB 060801: XRT/SDSS Frame Offset and Refined XRT Position
  14. GRB060801: Radio Observations
  15. GRB 051109B: Bright spiral host galaxy at low redshift
  16. GRB060801: Swift/UVOT Upper Limits
  17. GRB 060801: optical observations at Hanle and Calar Alto
  18. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  19. GRB 060801, optical observation
  20. GRB 060801: Kanazawa Optical Observation
  21. GRB 060719: TORTOREM optical upper limits
  22. GRB 060729: Refined analysis of the Swift-BAT burst
  23. GRB 060729: Swift-XRT refined analysis
  24. GRB 060729: Swift/UVOT Observations
  25. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  26. GRB 060728: Swift/UVOT Upper Limits
  27. GRB 060728, SMARTS optical/IR observations
  28. Swift/XRT preliminary analysis
  29. GRB 060728: Swift detection of a burst
  30. GRB 060714: Swift/UVOT Observations
  31. GRB060719: prompt NIR observations with REM
  32. GRB 060714: NOT observations
  33. GRB 060719: near-infrared afterglow
  34. GRB 060719: correction to the coordinates reported in GCN 5347
  35. GRB 060522: VLA observation
  36. GRB 060719: Swift/UVOT Upper Limits
  37. GRB 060719: VLT/ISAAC observations
  38. GRB 060719: Refined analysis of the Swift-BAT burst
  39. GRB 060719: XRT refined analysis
  40. GRB 060719: further analysis of VLT observations
  41. GRB060719: REM NIR Observations
  42. GRB 060719: VLT observations
  43. GRB 060719: LCO optical observations
  44. GRB 060719: Swift detection of a burst
  45. GRB 060717: Swift XRT refined analysis
  46. GRB 060714: Refined analysis of the Swift-BAT burst
  47. GRB060717: Swift/UVOT upper limits
  48. GRB 060717: Swift-BAT refined analysis
  49. GRB060717 - SDSS Pre-burst Observations
  50. GRB 060714: REM infrared observations
  51. GRB 060717, optical observation
  52. GRB 060714 : Liverpool Telescope Observations
  53. GRB 060714: Swift XRT refined analysis
  54. GRB 060708: VLT spectroscopy
  55. Swift trigger 219136 is probably not a GRB
  56. GRB 060714, optical observation
  57. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  58. GRB060712: P60 Observations
  59. GRB 060712: XRT refined analysis
  60. GRB 060712: Swift/UVOT Upper Limits
  61. GRB060526: optical observations
  62. GRB 060712: XRT refined position
  63. GRB 060712: Refined analysis of the Swift-BAT burst
  64. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  65. GRB 060707: OA fading and redshift
  66. GRB 060708: Swift-XRT refined analysis
  67. GCN 060708: Swift-UVOT Observations
  68. GRB 060708: Refined analysis of the Swift-BAT burst
  69. GCN 060707: Swift-UVOT observations
  70. GRB 060707: Swift-XRT refined analysis
  71. GRB 060708: Swift detection of a burst with an UVOT countpart
  72. GRB 060707: Refined analysis of the Swift-BAT burst
  73. GRB 060707: BOOTES-IR optical observation
  74. GRB 060515: Upper Limit on Host Galaxy
  75. GRB 060614: SMARTS host galaxy observations
  76. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  77. GRB 060109: Upper Limit on Host Galaxy
  78. GRB 060105: Upper limit on Host Galaxy
  79. GRB 060614: Redshift
  80. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  81. GRB050326: Host Galaxy Candidates
  82. GRB050124: Possible Host Galaxy
  83. GRB050223: Host Galaxy
  84. Konus-Wind observation of GRB 060614
  85. GRB060605: optical observation
  86. GRB 060614: optical observations
  87. GRB 060605, optical observations
  88. GRB 060614: Swift-BAT refined analysis
  89. GRB 060614: Swift/UVOT Observations
  90. GRB060614: Swift-XRT refined analysis
  91. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  92. GRB 060602A: Swift/XRT analysis
  93. BAT Trigger #214277 is SGR 1900+14
  94. GRB 060610: KAIT observations
  95. GRB 060607: RTT150 optical observations
  96. GRB 060607B: Swift-BAT Refined Analysis
  97. GRB060602A: Swift/UVOT upper limits
  98. GRB 060607B: Swift detection of a burst
  99. GCN 060607: Swift-UVOT obswervations.
  100. GRB 060607: Swift-BAT Refined Analysis

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