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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"

45614 results found.

  1. GRB 060804: Swift-XRT Team Refined Analysis
  2. GRB 060804: Refined analysis of the Swift-BAT burst
  3. GRB 060804: Swift detection of a burst with a possible UVOT counterpart
  4. GRB 060728: Upper limits of the X-ray emission
  5. GRB 060801: no variability of optical sources
  6. GRB 060801: WSRT Radio Observations
  7. GRB 060801: XRT/SDSS Frame Offset and Refined XRT Position
  8. GRB060801: Radio Observations
  9. GRB 051109B: Bright spiral host galaxy at low redshift
  10. GRB 060801: optical observations at FORS2/VLT
  11. GRB060801: Swift/UVOT Upper Limits
  12. GRB 060801: optical observations at Hanle and Calar Alto
  13. GRB060801: optical upper limit in R
  14. GRB 060801: Swift XRT refined analysis
  15. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  16. GRB 060801, optical observation
  17. GRB 060801: Kanazawa Optical Observation
  18. GRB 060801: Swift detection of a short burst
  19. GRB060729: ROTSE-III Observations of the Slow Optical Decay
  20. GRB 060218 / SN 2006aj Nebular Spectrum
  21. IBAS Alert n. 3415: not a GRB
  22. Swift-BAT trigger 221873 is not a GRB or a Transient
  23. GRB 060729 redshift
  24. GRB 060719: TORTOREM optical upper limits
  25. GRB 060729: Swift/UVOT Detections
  26. GRB 060729: Refined analysis of the Swift-BAT burst
  27. GRB 060729: Swift-XRT refined analysis
  28. GRB 060729 : Planned XMM-Newton observation
  29. GRB 060729: Swift/UVOT Observations
  30. GRB 060729: ROTSE-III Detection of Optical Counterpart
  31. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  32. GRB 060728: Swift/UVOT Upper Limits
  33. GRB 060728: Refined analysis of the Swift-BAT burst
  34. GRB 060728, SMARTS optical/IR observations
  35. Swift/XRT preliminary analysis
  36. GRB 060728: Swift detection of a burst
  37. GRB060614 ATCA Radio Limits
  38. GRB 060218 (SN 2006aj): IR afterglow detection six months after the
  39. GRB 060714: Swift/UVOT Observations
  40. GRB060719: prompt NIR observations with REM
  41. GRB 060714: NOT observations
  42. GRB 060719: near-infrared afterglow
  43. GRB 060719: correction to the coordinates reported in GCN 5347
  44. GRB 060522: VLA observation
  45. GRB 060719: Swift/UVOT Upper Limits
  46. GRB 060719: VLT/ISAAC observations
  47. GRB 060719: Refined analysis of the Swift-BAT burst
  48. GRB 060719: XRT refined analysis
  49. GRB 060719: further analysis of VLT observations
  50. GRB 060719: optical limit by Pi-of-the-Sky
  51. GRB060719: FRAM early follow-up limit
  52. GRB 060719: prompt PROMPT observations
  53. GRB060719: REM NIR Observations
  54. GRB 060719: VLT observations
  55. GRB 060719: LCO optical observations
  56. GRB 060719: Swift detection of a burst
  57. GRB 060717: Swift XRT refined analysis
  58. GRB 060714: OA fading and a possible host detection
  59. GRB060714: optical observations
  60. GRB 060717: NOT observations
  61. GRB 060714: Refined analysis of the Swift-BAT burst
  62. GRB 060717 optical upper limit
  63. GRB060717: Swift/UVOT upper limits
  64. GRB 060717: Swift XRT refined position
  65. GRB 060717: Swift-BAT refined analysis
  66. GRB060717 - SDSS Pre-burst Observations
  67. GRB 060714: REM infrared observations
  68. GRB 060717, optical observation
  69. GRB 060717: Swift detection of a burst
  70. GRB060714: correction to GCN 5324
  71. GRB060714: optical observations
  72. GRB 060714, SMARTS optical/IR afterglow observation
  73. GRB 060714 : Liverpool Telescope Observations
  74. GRB 060714: Swift XRT refined analysis
  75. GRB 060714: OA redshift
  76. GRB 060708: VLT spectroscopy
  77. GRB060708: MARGE low resolution spectrum observations
  78. GRB060714: optical observations
  79. Swift-BAT trigger 219136 is not a GRB
  80. Correction to Circular 5314: Circular refers to GRB 060714
  81. GRB060707 possible optical confirmation
  82. Swift trigger 219136 is probably not a GRB
  83. GRB 060714, optical observation
  84. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  85. GRB 060605: SkyNet Optical Limits
  86. GRB060712: P60 Observations
  87. GRB 060712: XRT refined analysis
  88. GRB 060712: Swift/UVOT Upper Limits
  89. GRB060526: optical observations
  90. GRB 060712: XRT refined position
  91. GRB 060712: Refined analysis of the Swift-BAT burst
  92. GRB 060712: Swift detection of a burst
  93. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  94. GRB 060708: PROMPT Optical Limits
  95. GRB 060707: OA fading and redshift
  96. GRB 060708: Swift-XRT refined analysis
  97. GCN 060708: Swift-UVOT Observations
  98. GRB 060708: Refined analysis of the Swift-BAT burst
  99. GCN 060707: Swift-UVOT observations
  100. GRB 060707: Swift-XRT refined analysis

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