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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"

43879 results found.

  1. GRB 060805: Swift/UVOT Upper Limits
  2. GRB 060805: P60 Observations
  3. GRB 060805: KAIT observations
  4. GRB 060805 - SDSS Pre-Burst Observations
  5. GRB 060805: Swift detection of a burst
  6. GRB 060804: Swift UVOT observations
  7. GRB 060804: Swift-XRT Team Refined Analysis
  8. GRB 060804: Refined analysis of the Swift-BAT burst
  9. GRB 060804: Swift detection of a burst with a possible UVOT counterpart
  10. GRB 060728: Upper limits of the X-ray emission
  11. GRB 060801: no variability of optical sources
  12. IBAS Alert 3418: not a GRB
  13. GRB 060801: WSRT Radio Observations
  14. GRB 060801: XRT/SDSS Frame Offset and Refined XRT Position
  15. GRB060801: Radio Observations
  16. GRB 051109B: Bright spiral host galaxy at low redshift
  17. GRB 060801: optical observations at FORS2/VLT
  18. GRB060801: Swift/UVOT Upper Limits
  19. GRB 060801: optical observations at Hanle and Calar Alto
  20. GRB060801: optical upper limit in R
  21. GRB 060801: Swift XRT refined analysis
  22. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  23. GRB 060801: Swift detection of a short burst
  24. GRB060729: ROTSE-III Observations of the Slow Optical Decay
  25. GRB 060218 / SN 2006aj Nebular Spectrum
  26. IBAS Alert n. 3415: not a GRB
  27. Swift-BAT trigger 221873 is not a GRB or a Transient
  28. GRB 060729 redshift
  29. GRB 060719: TORTOREM optical upper limits
  30. GRB 060729: Refined analysis of the Swift-BAT burst
  31. GRB 060729: Swift-XRT refined analysis
  32. GRB 060729: Swift/UVOT Observations
  33. GRB 060729: ROTSE-III Detection of Optical Counterpart
  34. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  35. GRB 060728: Swift/UVOT Upper Limits
  36. GRB 060728: Refined analysis of the Swift-BAT burst
  37. GRB 060728, SMARTS optical/IR observations
  38. Swift/XRT preliminary analysis
  39. GRB 060728: Swift detection of a burst
  40. GRB060614 ATCA Radio Limits
  41. GRB 060218 (SN 2006aj): IR afterglow detection six months after the
  42. GRB 060714: Swift/UVOT Observations
  43. GRB060719: prompt NIR observations with REM
  44. GRB 060719: near-infrared afterglow
  45. GRB 060719: correction to the coordinates reported in GCN 5347
  46. GRB 060522: VLA observation
  47. GRB 060719: Swift/UVOT Upper Limits
  48. GRB 060719: VLT/ISAAC observations
  49. GRB 060719: Refined analysis of the Swift-BAT burst
  50. GRB 060719: XRT refined analysis
  51. GRB 060719: further analysis of VLT observations
  52. GRB 060719: optical limit by Pi-of-the-Sky
  53. GRB 060719: prompt PROMPT observations
  54. GRB060719: REM NIR Observations
  55. GRB 060719: Continued LCO optical observations
  56. GRB 060719: LCO optical observations
  57. GRB 060719: Swift detection of a burst
  58. GRB 060717: Swift XRT refined analysis
  59. GRB 060714: OA fading and a possible host detection
  60. GRB060714: optical 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: optical observations
  71. GRB 060714, SMARTS optical/IR afterglow observation
  72. GRB 060714 : Liverpool Telescope Observations
  73. GRB 060714: Swift XRT refined analysis
  74. GRB 060714: OA redshift
  75. GRB 060708: VLT spectroscopy
  76. GRB060708: MARGE low resolution spectrum observations
  77. GRB060714: optical observations
  78. Swift-BAT trigger 219136 is not a GRB
  79. GRB060707 possible optical confirmation
  80. Swift trigger 219136 is probably not a GRB
  81. GRB 060714, optical observation
  82. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  83. GRB 060605: SkyNet Optical Limits
  84. GRB060712: P60 Observations
  85. GRB 060712: XRT refined analysis
  86. GRB060526: optical observations
  87. GRB 060712: XRT refined position
  88. GRB 060712: Refined analysis of the Swift-BAT burst
  89. GRB 060712: Swift detection of a burst
  90. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  91. GRB 060708: PROMPT Optical Limits
  92. GRB 060707: OA fading and redshift
  93. GRB 060708: Swift-XRT refined analysis
  94. GCN 060708: Swift-UVOT Observations
  95. GRB 060708: Refined analysis of the Swift-BAT burst
  96. GCN 060707: Swift-UVOT observations
  97. GRB 060707: Swift-XRT refined analysis
  98. GRB 060708: Swift detection of a burst with an UVOT countpart
  99. GRB060707 possible optical confirmation
  100. GRB 060707: BOOTES-IR optical afterglow candidate

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