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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"

28232 results found.

  1. GRB 080212: Enhanced Swift-XRT position
  2. GRB 080212: Swift-XRT Team refined analysis
  3. GRB 080210: Keck photometry
  4. VLA non-detection of GRB 080210
  5. GRB 080212: Swift detection of a burst
  6. GRB 080207: VLT NIR early upper limits
  7. GRB 080210: Swift/UVOT Refined Analysis
  8. GRB 080210, Swift-BAT refined analysis
  9. GRB 080210: Super-LOTIS observations
  10. GRB 080210: Swift-XRT Refined Analysis
  11. GRB 080210: Enhanced Swift-XRT position
  12. GRB 080210: GOND detection in all bands and redshift upper limit
  13. GRB080210 - SDSS Pre-Burst Observations
  14. GRB 080210: Swift detection of a burst with optical afterglow
  15. GRB 080210: TAROT La Silla observatory optical detection
  16. GRB 080207: GROND upper limits
  17. GRB 080205: GAO 150cm telescope Optical limit
  18. GRB 080207, Swift-BAT refined analysis
  19. GRB 080207: Optical limits from Gemini-South
  20. Swift detection of AX J1749.1-2639
  21. GRB 080207: Super-LOTIS observations
  22. GRB 080207, Swift-BAT refined analysis
  23. Swift Trigger 302777 is not a GRB
  24. GRB080207: RTT150 Optical Observations
  25. GRB 080207: REM NIR observations
  26. GRB080207: Swift/UVOT refined analysis
  27. GRB 080207: TAROT Calern observatory optical observations
  28. GRB 080207: Swift-XRT Refined Analysis
  29. GRB 080207: Enhanced Swift-XRT position
  30. GRB 080207: Swift detection of a burst
  31. GRB 080205: optical observation
  32. VLA radio upper limit on GRB 080205
  33. INT+WFC R-band observations of GRB 080205
  34. GRB 080205, Swift-BAT refined analysis
  35. IPN localization of very hard GRB 080204
  36. GRB 080205: Swift XRT refined analysis
  37. GRB 080205: Swift/UVOT observations
  38. GRB 080205: Enhanced Swift-XRT position
  39. Swift-BAT Trigger #302454, correction of GCN notice, update on AX J1749.1-2639
  40. GRB 080130: Swift-BAT refined analysis
  41. GRB 080130: further Swift XRT observations confirm fading source
  42. GRB 080129: Swift/UVOT Refined Upper Limits
  43. Swift/UVOT observations of GRB080130
  44. GRB 080130: REM NIR observations
  45. GRB 080130(?): Swift XRT observation
  46. GRB 080129: Swift-XRT refined analysis
  47. GRB 080129: KAIT optical limits
  48. GRB 080129, Swift-BAT refined analysis
  49. GRB 080129: TAROT La Silla observatory optical observations
  50. GRB 080129: GROND detection in all bands, and fading
  51. GRB 080129: GROND detection of the optical/NIR afterglow, and fading
  52. GRB 080129: Enhanced Swift-XRT position
  53. GRB 080129: Gemini-South Imaging Observations
  54. GRB 080129 (?): UVOT Upper Limits
  55. A new website of high-level data products for Swift GRBs
  56. GRB 080123 : Suzaku WAM observation of the prompt emission
  57. Transient 080109/SN 2008D: Spectroscopic Evolution
  58. Konus-Wind observation of GRB 080122
  59. GRB 080122 : Suzaku WAM observation of the prompt emission
  60. GRB 080121: Swift/UVOT upper limits
  61. SNe 2008D and 2007uy: Chandra Detections
  62. GRB 080121: Enhanced Swift-XRT position
  63. Transient 080109/SN 2008D: Spectroscopic Evolution and Re-Classification
  64. IPN triangulation of GRB080122
  65. GRB 080121: Nearby SDSS galaxies
  66. GRB 080123: Swift-XRT refined analysis
  67. GRB 080123: Swift/UVOT refined analysis
  68. GRB 080123, Swift-BAT refined analysis
  69. GRB 080123: Enhanced Swift-XRT position
  70. GRB 080123: Swift detection of a short burst
  71. GRB 080120: GROND confirmation of the optical afterglow
  72. VLA radio upper limit on GRB 080120
  73. GRB 080120: Swift-XRT refined analysis
  74. GRB 080120: GROND detection
  75. GRB080120: Swift XRT position
  76. GRB 080120: a long GRB detected by INTEGRAL
  77. Transient in NGC2770 / SN2008D: Metallicity of nearby HII regions
  78. Transient XRF 080109 / SN 2008D: Mount Abu NIR observations
  79. XRF 080109 / SN 2008D: UKIRT JHK imaging
  80. optical observations, XRT in NGC 2770
  81. XRF 080109/SN 2008D: PROMPT Optical Imaging
  82. Gemini-South observations of XRF 080109 / SN 2008D
  83. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  84. Discovery of Radio Emission from Transient in NGC 2770
  85. XRF 080109 in NGC2770: NIR observations at TNG
  86. XRB 080109/SN 2008D: Early decline in brightness and change in colors
  87. XRB 080109/SN 2008D:PAIRITEL NIR observations and t_0 from Swift
  88. XRF 080109 in NGC2770: Detectable Superluminal Motion
  89. Refined Swift-XRT analysis of the transient in NGC 2770
  90. Bright X-ray Transient in NGC 2770 - A low-luminosity XRF?
  91. GRB 071227: Suzaku WAM observation of the prompt emission
  92. GRB 071227: optical afterglow
  93. Further Swift-BAT analysis of GRB 071227
  94. Konus-Wind observation of GRB 071227
  95. GRB 071227: Swift-XRT refined analysis
  96. GRB 071227: VLT probable redshift of the candidate host galaxy
  97. GRB071227: Swift/UVOT refined analysis
  98. GRB 071227: REM NIR and Optical observations
  99. Swift-BAT refined analysis of short GRB 071227
  100. GRB 071227: Swift detection of a burst

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