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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"

16096 results found.

  1. GRB 060805B: XRT Team Analysis
  2. GRB 060807: UVOT Upper limits
  3. GRB 060807: afterglow confirmation
  4. GRB 060807: K- and R-band observations
  5. GRB060807: optical afterglow candidate
  6. GRB060807: optical upper limit in white light
  7. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  8. GRB 060805B: Swift/UVOT Upper Limits
  9. GRB 060807, optical observation
  10. GRB 060807: optical limit
  11. GRB 060805: optical upper limit in R
  12. GRB 060805: Swift/UVOT Upper Limits
  13. GRB 060804: Swift UVOT observations
  14. GRB 060801: no variability of optical sources
  15. GRB 060801: WSRT Radio Observations
  16. GRB 060801: XRT/SDSS Frame Offset and Refined XRT Position
  17. GRB 051109B: Bright spiral host galaxy at low redshift
  18. GRB 060801: optical observations at FORS2/VLT
  19. GRB060801: Swift/UVOT Upper Limits
  20. GRB 060801: optical observations at Hanle and Calar Alto
  21. GRB060801: optical upper limit in R
  22. GRB 060801, optical observation
  23. GRB 060801: Kanazawa Optical Observation
  24. GRB060729: ROTSE-III Observations of the Slow Optical Decay
  25. GRB 060719: TORTOREM optical upper limits
  26. GRB 060729: Swift/UVOT Detections
  27. GRB 060729: Swift/UVOT Observations
  28. GRB 060729: ROTSE-III Detection of Optical Counterpart
  29. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  30. GRB 060728: Refined analysis of the Swift-BAT burst
  31. GRB 060728, SMARTS optical/IR observations
  32. GRB 060218 (SN 2006aj): IR afterglow detection six months after the
  33. GRB 060714: Swift/UVOT Observations
  34. GRB 060714: NOT observations
  35. GRB 060719: near-infrared afterglow
  36. GRB 060719: optical limit by Pi-of-the-Sky
  37. GRB 060719: prompt PROMPT observations
  38. GRB 060719: Continued LCO optical observations
  39. GRB 060719: LCO optical observations
  40. GRB 060714: OA fading and a possible host detection
  41. GRB060714: optical observations
  42. GRB 060717: NOT observations
  43. GRB 060717 optical upper limit
  44. GRB 060717, optical observation
  45. GRB060714: optical observations
  46. GRB 060714, SMARTS optical/IR afterglow observation
  47. GRB 060714: Swift XRT refined analysis
  48. GRB 060714: OA redshift
  49. GRB 060708: VLT spectroscopy
  50. GRB060708: MARGE low resolution spectrum observations
  51. GRB060714: optical observations
  52. Correction to Circular 5314: Circular refers to GRB 060714
  53. GRB060707 possible optical confirmation
  54. GRB 060714, optical observation
  55. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  56. GRB 060605: SkyNet Optical Limits
  57. GRB060526: optical observations
  58. GRB060712: MASTER optical observation
  59. GRB120706: MASTER optical observation
  60. GRB 060708: PROMPT Optical Limits
  61. GRB 060707: OA fading and redshift
  62. GCN 060708: Swift-UVOT Observations
  63. GCN 060707: Swift-UVOT observations
  64. GRB 060707: Swift-XRT refined analysis
  65. GRB060707 possible optical confirmation
  66. GRB 060707: BOOTES-IR optical afterglow candidate
  67. GRB 060707: BOOTES-IR optical observation
  68. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  69. GRB060614: Detection of the host galaxy but no supernova emission
  70. GRB060614: Optical observations
  71. GRB060512: near IR observations
  72. GRB060526: optical observations
  73. GRB060605: optical observation
  74. The Unusually Long-Lived Afterglow of GRB 060614
  75. GRB 060614: optical observations
  76. GRB 060605, optical observations
  77. GRB 060614, SMARTS optical/IR afterglow observation
  78. GRB 060614: Swift/UVOT Observations
  79. GRB 060604, optical observations
  80. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  81. GRB 060607: RTT150 optical observations
  82. GRB 070706B: Watcher upper limit
  83. GRB060602A: Swift/UVOT upper limits
  84. GCN 060607: Swift-UVOT obswervations.
  85. GRB 060607: optical limit by "Pi of the Sky"
  86. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  87. GRB 060607: PROMPT Observations
  88. GRB 060605: RTT150 optical observations
  89. GRB 060607: Swift detection of a burst with bright optical counterpart
  90. GRB 060522: PROMPT Optical Limits
  91. GRB 060605: Xinglong TNT optical observations
  92. GRB060605: Swift/UVOT detections
  93. GRB 060605: Swift-XRT Team refined analysis
  94. GRB 060605: TNG optical observations
  95. GRB 060605: RTT150 optical observations
  96. GRB 060605: ROTSE-III Optical Counterpart
  97. GRB 060605: Swift detection of a burst with optical counterpart
  98. GRB 060605: ROTSE-III Detection of Optical Counterpart
  99. GRB 060604: redshift
  100. GRB 060512: Keck Redshift

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