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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"

28115 results found.

  1. GRB 030329 RBO V Optical Observations
  2. GRB 030329, optical photometry
  3. GRB030329: Near Infrared Observations
  4. GRB 030328, optical photometry
  5. GRB 030329: SARA Optical Observations
  6. GRB 030329, optical observations
  7. GRB030328: X-ray Fading and Spectrum Measured with Chandra
  8. GRB030329a: detection by Konus-Wind
  9. GRB030329b: detection by Konus-Wind and Helicon-CoronasF
  10. GRB 030329: Light curve observed during the change of its slope.
  11. GRB030329, SPM optical observations
  12. GRB 030329: Optical Decay
  13. Redshift of GRB 030329
  14. GRB 030329, optical photometry
  15. GRB 030329: Optical decay and synthesis
  16. GRB030329: optical spectroscopy with the TNG
  17. GRB 030329: Radio Observations
  18. GRB 030329, optical spectroscopy
  19. GRB 030329: still bright
  20. GRB 030329: Optical pre-Imaging
  21. GRB 030329: visual observations
  22. GRB030328: R optical observation
  23. GRB030328: X-ray Afterglow Observed with Chandra
  24. GRB 030323: Gemini South VRI obsevations.
  25. GRB 030329: optical observations
  26. GRB 030329, R-band observations
  27. RXTE detection of GRB 030329 afterglow
  28. GRB 030329: Optical Afterglow Observations
  29. GRB 030329: precise position from Kyoto images
  30. GRB 030328 Optical Observations
  31. GRB030328: Decay index
  32. GRB 030329: Optical afterglow fading
  33. GRB 030329 follow-up
  34. GRB 030329: Optical afterglow candidate
  35. GRB 030329: Optical afterglow candidate
  36. GRB030328: optical spectroscopy at TNG
  37. GRB030328: optical photometry at the TNG
  38. VLT spectra of GRB 030328
  39. GRB 030328, optical spectroscopy
  40. GRB 030328, optical observations
  41. GRB 030328: Optical observations
  42. GRB 030328: Finding chart
  43. GRB 030328: Optical afterglow candidate
  44. GRB030131, BVRcIc field photometry
  45. Possible GRB030323 localized by INTEGRAL
  46. GRB030323: Detection on 2003/03/24
  47. GRB 030323: SARA Optical Observations
  48. GRB030324, optical observations
  49. GRB030323: V, R, I photometry
  50. GRB 030324 (HETE #2641): Optical observations
  51. VLT/FORS2 spectra of GRB 030323
  52. GRB030323, ROTSE-III detection of possible optical counterpart
  53. Possible GRB 030320 localized by INTEGRAL
  54. GRB 030226 Optical observations
  55. GRB030226: Analysis of Chandra data
  56. Chandra detection of the X-ray afterglow of GRB 030226
  57. GRB 030226, further optical/NIR imaging
  58. GRB 030226: Ic Observations
  59. GRB030227: Kiso optical upper limit
  60. GRB 030227 optical afterglow
  61. GRB 030228, optical observations
  62. GRB 030226: Steep Decline
  63. GRB 030227: Confirmed Optical Afterglow (S1-A)
  64. GRB 030226: R band polarimetric observations
  65. GRB 030227: fading of candidate optical afterglow 'S1-A'
  66. GRB030227:Optical observations
  67. GRB 030227, possible optical counterpart of XMM-Newton source
  68. GRB 030226, optical observations
  69. GRB 030226, optical light curve
  70. GRB 030226 spectroscopy
  71. GRB030227 localized by INTEGRAL
  72. Possible break in the GRB 030226 light curve
  73. GRB 030226 : Predicted light curve
  74. GRB030226: optical observation
  75. GRB 030226: Confirmed decay index
  76. GRB030226: ESI spectroscopy
  77. GRB030226 (=U10893): A Long GRB Localized by the HETE WXM and SXC
  78. Two absorption systems in GRB 030226
  79. GRB 030226, optical observations
  80. GRB030226: optical observations and refined redshift
  81. GRB030226: Optical decay index
  82. GRB 030226 Optical Spectra and R,I,z' Imaging
  83. GRB 030226: Optical afterglow
  84. GRB030226: Candidate optical afterglow
  85. GRB 030217: Optical Observations at 4, 5, and 6 Days
  86. GRB030115, WSRT radio observations - correction to GCN 1864
  87. GRB 030131: marginal optical detection
  88. GRB030115, WSRT radio observations
  89. GRB030204 field photometry
  90. GRB020819: Kiso R and I band observations
  91. GRB030131: Candidate Optical Afterglow
  92. GRB 030131, optical observations
  93. GRB030131: Optical limits for corrected position
  94. GRB 030131: afterglow candidate
  95. GRB 020819: afterglow candidate
  96. A long GRB detected by INTEGRAL
  97. GRB030115: 1.2 mm upper limits with MAMBO @ IRAM 30m
  98. GRB030115 submm upper limit
  99. GRB 030115: Further IR observations with IRSF/SIRIUS
  100. GRB 030115: Radio detection of IR candidate

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