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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"

26553 results found.

  1. Swift/UVOT observations of GRB 080315
  2. Swift trigger 306323: Swift-BAT/XRT refined analysis
  3. GRB 080315: TAROT Calern observatory optical observations
  4. GRB 080315: Swift detection of a possible burst
  5. GRB080310 : Lulin Optical observations
  6. GRB 080310: GAO 150cm telescope Optical Observation
  7. GRB080310 : Optical observations by LOAO and Lulin
  8. GRB 080310: ROTSE-III Observations of Optical Counterpart
  9. GRB080310: Optical observation by MITSuME telescope
  10. GRB 080307: GAO 150cm telescope Optical Observation
  11. GRB 080229A: GAO 150cm telescope Optical Observation
  12. GRB 080310: PAIRITEL detection and PAIRITEL+KAIT+UVOT SED
  13. GRB 080310: early RAPTOR multicolor observations
  14. GRB 080310, Swift-BAT refined analysis
  15. GRB 080310: Swift-XRT refined analysis
  16. GRB 080310: Redshift from Keck/DEIMOS Spectra
  17. GRB 080310 - SDSS Pre-Burst Observations
  18. GRB 080310: Enhanced Swift-XRT position
  19. GRB 080310: VLT/UVES spectroscopy
  20. GRB080310: Super-LOTIS suggestion of brightening
  21. GRB 080310, SMARTS optical/IR afterglow observations
  22. GRB 080310: Swift detection of a burst with optical afterglow
  23. GRB 080307: Swift-XRT Team refined analysis
  24. GRB 080307, Swift-BAT refined analysis
  25. GRB080307 - SDSS Pre-Burst Observations
  26. GRB 080307: TNT optical observation
  27. GRB 080307: retraction of UVOT candidate
  28. GRB 080307: Enhanced Swift-XRT position
  29. GRB 080307, Preliminary Swift-BAT refined analysis
  30. GRB 080307: Swift detection of a burst
  31. VLA possible radio detection of GRB 080229
  32. GRB 080303, Swift-BAT refined analysis
  33. GRB 080303: Enhanced Swift-XRT position
  34. Swift UVOT observations of GRB080229B
  35. GRB080229B: Swift XRT afterglow observation
  36. GRB 080303: Swift detection of a burst with optical afterglow
  37. GRB080229: Swift XRT refined analysis
  38. GRB 080229: Enhanced Swift-XRT position
  39. GRB 080229B: Gamma Ray Burst Localization by SuperAGILE
  40. UVOT analysis for GRB080229
  41. GRB 080229, Swift-BAT refined analysis
  42. GRB 080229A: ROTSE-III Optical Limits
  43. GRB 080229: Swift detection of a bright burst
  44. Early optical shallow decay in GRB 071112C
  45. GRB080205: optical observations
  46. XRF 080109/SN2008D : GMRT upper limit at 1.28 GHz
  47. GRB 071010B : Early optical brightening detected by TAOS
  48. Swift-XRT improved positions, and new redshift limits.
  49. ESO optical and NIR observations of GRB 080218B
  50. GRB 080204: Suzaku WAM observation of the prompt emission
  51. GRB 080218B, Swift-BAT refined analysis
  52. GRB 080212: Mount Abu NIR observations
  53. GRB 080218B: Enhanced Swift-XRT position
  54. GRB 080218A, Swift-BAT refined analysis
  55. GRB 080211: Suzaku WAM observation of the prompt emission
  56. GRB 080218B: Swift detection of a burst
  57. GRB 080218: Swift detection of a burst
  58. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  59. Konus-Wind observation of GRB 080211
  60. VLA radio upper limit on GRB 080212
  61. Swift/UVOT refined analysis of GRB080212
  62. GRB 080212, Swift-BAT refined analysis
  63. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  64. GRB 080212: GROND detects afterglow
  65. GRB 080212: optical observations
  66. GRB 080212: Enhanced Swift-XRT position
  67. GRB 080210: Keck photometry
  68. VLA non-detection of GRB 080210
  69. GRB 080212: Swift detection of a burst
  70. GRB 080210: Swift/UVOT Refined Analysis
  71. GRB 080210: Hobby-Eberly Telescope Absorption Spectroscopy
  72. GRB 080210, Swift-BAT refined analysis
  73. GRB 080210: Super-LOTIS observations
  74. GRB 080210: Swift-XRT Refined Analysis
  75. GRB 080210: VLT redshift
  76. GRB 080210: Enhanced Swift-XRT position
  77. GRB 080210: GOND detection in all bands and redshift upper limit
  78. GRB080210 - SDSS Pre-Burst Observations
  79. GRB 080210: Swift detection of a burst with optical afterglow
  80. GRB 080210: TAROT La Silla observatory optical detection
  81. GRB 080207: GROND upper limits
  82. GRB 080205: GAO 150cm telescope Optical limit
  83. GRB 080207, Swift-BAT refined analysis
  84. GRB 080207, Swift-BAT refined analysis
  85. GRB080207: RTT150 Optical Observations
  86. GRB 080207: TAROT Calern observatory optical observations
  87. GRB 080207: Swift-XRT Refined Analysis
  88. GRB 080207: Enhanced Swift-XRT position
  89. GRB 080207: Swift detection of a burst
  90. Konus-Wind observation of GRB 080204
  91. GRB 080205 optical upper limit
  92. GRB 080205: optical observation
  93. VLA radio upper limit on GRB 080205
  94. INT+WFC R-band observations of GRB 080205
  95. GRB 080205, Swift-BAT refined analysis
  96. IPN localization of very hard GRB 080204
  97. GRB 080205: OA evolution from KAIT observations
  98. GRB 080205: Swift/UVOT observations
  99. GRB 080205: Enhanced Swift-XRT position
  100. GRB 080205: Swift detection of a burst

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