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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"

15373 results found.

  1. GRB 080328: Swift XRT refined analysis
  2. Swift/UVOT observations of GRB080328
  3. GRB080325 - I and z-band Imaging
  4. GRB080319B, BVRcIc field calibration
  5. GRB 080325: Subaru detection of NIR afterglow candidate
  6. GRB 080325: GROND Observations
  7. GRB 080325: Early observations from OSN
  8. GRB 080319C: Suzaku WAM observation of the prompt emission
  9. GRB 080319B: Second & Third Epoch WSRT Radio Observations
  10. GRB 080319D: GROND Observations
  11. GRB 080319B: optical upper limit
  12. GRB 080319D: optical upper limit
  13. GRB 080319C: UVOT Observations
  14. GRB 080319B: UVOT Observations
  15. GRB 080319A: UVOT Observations
  16. GRB 080320: optical limit
  17. Konus-Wind observation of GRB 080319C
  18. GRB 080319B optical observations
  19. Konus-Wind observation of GRB 080319B
  20. GRB 080320: SDSS source and Gemini-N observations
  21. GRB 080319C: Early RAPTOR Observations
  22. GRB 080319B: second epoch imaging from Canarias (correction to GCN7469)
  23. GRB 080319C: KAIT OA observations
  24. GRB 080320 - SDSS Pre-Burst Observations
  25. GRB 080319B: ROTSE-III Observations of Optical Counterpart
  26. GRB 080319C - SDSS Pre-Burst Observations
  27. GRB 080319A SDSS Pre-Burst Observations
  28. GRB080319B - SDSS Pre-Burst Observations
  29. GRB 080319A: Swift-XRT Team Refined Analysis
  30. GRB 080319B: Swift-XRT Team Refined Analysis
  31. GRB 080319C: AGILE-MCAL observation of the prompt emission
  32. GRB 080319B: Hobby-Eberly Telescope Spectroscopy
  33. VLT/UVES redshift of GRB 080319B from FeII fine-structure lines
  34. GRB 080319A/B/C: INTEGRAL SPI-ACS light curves available
  35. GRB 080319B: REM early data
  36. GRB 080319C: Early Super-LOTIS Observations
  37. GRB 080319B: Change in power law decay index
  38. GRB 080319A: optical observations at the NOT
  39. GRB 080319B: REM observations
  40. Swift trigger 306323: Swift-BAT/XRT refined analysis
  41. GRB080310 : Lulin Optical observations
  42. GRB080310, unusual slow decay in the optical
  43. GRB 080310: GAO 150cm telescope Optical Observation
  44. GRB080310 : Optical observations by LOAO and Lulin
  45. GRB 080310: ROTSE-III Observations of Optical Counterpart
  46. GRB 080307: GAO 150cm telescope Optical Observation
  47. GRB 080229A: GAO 150cm telescope Optical Observation
  48. GRB 080310: PAIRITEL detection and PAIRITEL+KAIT+UVOT SED
  49. GRB 080310, Swift-BAT refined analysis
  50. GRB 080310: Redshift from Keck/DEIMOS Spectra
  51. GRB 080310 - SDSS Pre-Burst Observations
  52. GRB 080310: VLT/UVES spectroscopy
  53. GRB 080310: REM observations
  54. GRB080307, optical upper limit
  55. GRB080307 BOAO optical afterglow observation - detection of a possible OT
  56. GRB080229, optical upper limit
  57. GRB 080307, Swift-BAT refined analysis
  58. GRB080307 - SDSS Pre-Burst Observations
  59. GRB 080307: BOAO imaging - retraction and new limit
  60. GRB 080307: retraction of UVOT candidate
  61. GRB 080307, Preliminary Swift-BAT refined analysis
  62. Swift UVOT observations of GRB080229B
  63. GRB080229: Possible optical afterglow
  64. GRB 080229B: Gamma Ray Burst Localization by SuperAGILE
  65. GRB 071010B : Early optical brightening detected by TAOS
  66. Swift-XRT improved positions, and new redshift limits.
  67. GRB 080204: Suzaku WAM observation of the prompt emission
  68. GRB 080212: Mount Abu NIR observations
  69. GRB 080211: Suzaku WAM observation of the prompt emission
  70. GRB 080212: REM refined analysis
  71. Konus-Wind observation of GRB 080211
  72. Swift/UVOT refined analysis of GRB080212
  73. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  74. IPN localization of GRB 080211
  75. GRB 080210: Swift/UVOT Refined Analysis
  76. GRB 080210: Hobby-Eberly Telescope Absorption Spectroscopy
  77. GRB 080210: Super-LOTIS observations
  78. GRB 080210: VLT redshift
  79. GRB 080210: GOND detection in all bands and redshift upper limit
  80. GRB080210 - SDSS Pre-Burst Observations
  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. Konus-Wind observation of GRB 080204
  86. GRB 080205 optical upper limit
  87. GRB 080205: optical observation
  88. IPN localization of very hard GRB 080204
  89. GRB 080205: Swift/UVOT observations
  90. GRB 080130: further Swift XRT observations confirm fading source
  91. GRB 080130: REM NIR observations
  92. GRB 080130(?): Swift XRT observation
  93. GRB 080130?: Detection of a possible burst by BATSS
  94. GRB 080129: Swift-XRT refined analysis
  95. GRB 080129: KAIT optical limits
  96. GRB 080123: Early afterglow detection with BATSS (BAT Slew Survey)
  97. GRB 080129: Gemini-South photometry
  98. GRB 080129: GROND detection in all bands, and fading
  99. GRB 080129: GROND detection of the optical/NIR afterglow, and fading
  100. GRB 080129: Swift XRT position

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