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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"

43862 results found.

  1. GRB060801: Swift/UVOT Upper Limits
  2. GRB 060801: optical observations at Hanle and Calar Alto
  3. GRB060801: optical upper limit in R
  4. GRB 060801: Swift XRT refined analysis
  5. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  6. GRB 060801: Swift detection of a short burst
  7. GRB060729: ROTSE-III Observations of the Slow Optical Decay
  8. GRB 060218 / SN 2006aj Nebular Spectrum
  9. IBAS Alert n. 3415: not a GRB
  10. Swift-BAT trigger 221873 is not a GRB or a Transient
  11. GRB 060729 redshift
  12. GRB 060719: TORTOREM optical upper limits
  13. GRB 060729: Refined analysis of the Swift-BAT burst
  14. GRB 060729: Swift-XRT refined analysis
  15. GRB 060729: Swift/UVOT Observations
  16. GRB 060729: ROTSE-III Detection of Optical Counterpart
  17. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  18. GRB 060728: Swift/UVOT Upper Limits
  19. GRB 060728: Refined analysis of the Swift-BAT burst
  20. GRB 060728, SMARTS optical/IR observations
  21. Swift/XRT preliminary analysis
  22. GRB 060728: Swift detection of a burst
  23. GRB060614 ATCA Radio Limits
  24. GRB 060218 (SN 2006aj): IR afterglow detection six months after the
  25. GRB 060714: Swift/UVOT Observations
  26. GRB060719: prompt NIR observations with REM
  27. GRB 060719: near-infrared afterglow
  28. GRB 060719: correction to the coordinates reported in GCN 5347
  29. GRB 060522: VLA observation
  30. GRB 060719: Swift/UVOT Upper Limits
  31. GRB 060719: VLT/ISAAC observations
  32. GRB 060719: Refined analysis of the Swift-BAT burst
  33. GRB 060719: XRT refined analysis
  34. GRB 060719: further analysis of VLT observations
  35. GRB 060719: optical limit by Pi-of-the-Sky
  36. GRB 060719: prompt PROMPT observations
  37. GRB060719: REM NIR Observations
  38. GRB 060719: Continued LCO optical observations
  39. GRB 060719: LCO optical observations
  40. GRB 060719: Swift detection of a burst
  41. GRB 060717: Swift XRT refined analysis
  42. GRB 060714: OA fading and a possible host detection
  43. GRB060714: optical observations
  44. GRB 060714: Refined analysis of the Swift-BAT burst
  45. GRB 060717 optical upper limit
  46. GRB060717: Swift/UVOT upper limits
  47. GRB 060717: Swift XRT refined position
  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 060717: Swift detection of a burst
  53. GRB060714: optical observations
  54. GRB 060714, SMARTS optical/IR afterglow observation
  55. GRB 060714 : Liverpool Telescope Observations
  56. GRB 060714: Swift XRT refined analysis
  57. GRB 060714: OA redshift
  58. GRB 060708: VLT spectroscopy
  59. GRB060708: MARGE low resolution spectrum observations
  60. GRB060714: optical observations
  61. Swift-BAT trigger 219136 is not a GRB
  62. GRB060707 possible optical confirmation
  63. Swift trigger 219136 is probably not a GRB
  64. GRB 060714, optical observation
  65. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  66. GRB 060605: SkyNet Optical Limits
  67. GRB060712: P60 Observations
  68. GRB 060712: XRT refined analysis
  69. GRB060526: optical observations
  70. GRB 060712: XRT refined position
  71. GRB 060712: Refined analysis of the Swift-BAT burst
  72. GRB 060712: Swift detection of a burst
  73. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  74. GRB 060708: PROMPT Optical Limits
  75. GRB 060707: OA fading and redshift
  76. GRB 060708: Swift-XRT refined analysis
  77. GCN 060708: Swift-UVOT Observations
  78. GRB 060708: Refined analysis of the Swift-BAT burst
  79. GCN 060707: Swift-UVOT observations
  80. GRB 060707: Swift-XRT refined analysis
  81. GRB 060708: Swift detection of a burst with an UVOT countpart
  82. GRB060707 possible optical confirmation
  83. GRB 060707: BOOTES-IR optical afterglow candidate
  84. GRB 060707: Refined analysis of the Swift-BAT burst
  85. GRB 060707: BOOTES-IR optical observation
  86. GRB060614: Possible SN Bump in UVOT U Band Light Curve
  87. GRB 060707: Swift detection of a burst
  88. GRB 060515: Upper Limit on Host Galaxy
  89. GRB 050223: Magellan redshift
  90. GRB 060614: SMARTS host galaxy observations
  91. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  92. Correction to GCN 5278 & GCN 5279 (GRBs 060105 & 060109)
  93. GRB 060109: Upper Limit on Host Galaxy
  94. GRB 060105: Upper limit on Host Galaxy
  95. GRB060614: Detection of the host galaxy but no supernova emission
  96. GRB 060614: redshift confirmation
  97. GRB 060614: Redshift
  98. Swift-BAT trigger 215279 is not a GRB
  99. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  100. GRB060614: Optical observations

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