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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"

45541 results found.

  1. GRB 030329: Additional Mt. Laguna Optical Observations
  2. GRB 030329: SARA Optical Observations
  3. GRB 030329: Observations with ANDICAM
  4. GRB030329: Optical observations
  5. GRB030329: further optical photometry and evidence for a light curve discontinuity
  6. GRB 030329: Correction to GCN 2056
  7. GRB 030329: fitting parameters and re-brightening
  8. GRB 030329: KAIT optical photometry
  9. GRB030329 Further RBO Optical Observations
  10. triangulation of GRB 030331 (single error box)
  11. GRB030329 - OT rebrightens
  12. GRB 030329: SARA Optical Observations
  13. AAVSO V & R observations of GRB030329
  14. IPN triangulation of GRB030331 (annulus)
  15. GRB 030329: optical observations
  16. IPN triangulation of GRB030329b (large error box)
  17. GRB 030329: beginning of the new fading phase in optical band
  18. GRB 030329, optical spectroscopy
  19. GRB 030329: fading X-ray afterglow with RXTE
  20. GRB 030329: optical photometry
  21. GRB030329: Optical observations
  22. Photometry of GRB030329 - Constant OT Magnitude
  23. GRB 030329, R-band observations
  24. GRB 030329, R-band light curve
  25. GRB 030329: further optical observations
  26. GRB030329 - OT brightens
  27. GRB 030329: OT observations at Kanazawa
  28. GRB030329 15 GHz radio observation
  29. GRB 030329 RBO V Optical Observations
  30. GRB 030329, optical photometry
  31. GRB030329: Near Infrared Observations
  32. GRB 030324: Optical and NIR Observations
  33. GRB 030328, optical photometry
  34. GRB030329: R band light curve by MASTER
  35. GRB030329 - Light curve flattening
  36. GRB 030329: SARA Optical Observations
  37. GRB 030324, optical search
  38. GRB030329 - near contemporaneous optical limits from CONCAM
  39. GRB030329: R and B observations
  40. GRB 030329, optical observations
  41. GRB030329: Optical observations
  42. GRB030328: X-ray Fading and Spectrum Measured with Chandra
  43. GRB030329a: detection by Konus-Wind
  44. GRB030329b: detection by Konus-Wind and Helicon-CoronasF
  45. GRB 030329: Light curve observed during the change of its slope.
  46. GRB030329, BVRcIc field photometry
  47. GRB030329, SPM optical observations
  48. GRB 030329: Optical Decay
  49. Redshift of GRB 030329
  50. GRB030329: ROTSE network observes steepening of decay curve
  51. GRB 030329, optical photometry
  52. GRB 030329: Optical decay and synthesis
  53. GRB030329 optical observations
  54. GRB030329: optical spectroscopy with the TNG
  55. GRB 030329: Radio Observations
  56. GRB 030329, optical spectroscopy
  57. GRB 030329: still bright
  58. GRB 030329: Optical pre-Imaging
  59. GRB 030329: visual observations
  60. GRB 030329: Upper limit from 5.6 hours before trigger
  61. GRB030328: R optical observation
  62. GRB030328: X-ray Afterglow Observed with Chandra
  63. GRB 030323: Gemini South VRI obsevations.
  64. GRB030329: Optical observations
  65. GRB030329 optical observations
  66. GRB030329:optical observations by MASTER
  67. GRB 030329: optical observations
  68. GRB 030329, R-band observations
  69. GRB 030329: OT B and R photometry, decline rate
  70. GRB030329: Upper limits from recent and historical observations.
  71. GRB030329 (=H2652): A Long, Extremely Bright GRB Localized by the HETE WXM and SXC
  72. RXTE detection of GRB 030329 afterglow
  73. GRB 030329: Optical Afterglow Observations
  74. GRB 030329: precise position from Kyoto images
  75. GRB 030328 Optical Observations
  76. GRB030328: Decay index
  77. GRB 030328: Optical observations
  78. GRB 030328: optical observations
  79. GRB 030329: Optical afterglow fading
  80. GRB 030329 follow-up
  81. GRB 030329: Optical afterglow candidate
  82. GRB 030329: OT candidate
  83. GRB 030329: Optical afterglow candidate
  84. GRB 030328: OT photometry
  85. GRB030328: optical spectroscopy at TNG
  86. GRB030328: optical photometry at the TNG
  87. VLT spectra of GRB 030328
  88. GRB 030328, optical spectroscopy
  89. GRB 030328, optical observations
  90. GRB030328 (=H2650): A Long, Bright GRB Localized by the HETE WXM and SXC
  91. GRB 030328: Optical observations
  92. GRB 030328: Optical afterglow candidate
  93. GRB030323 optical observations
  94. GRB030324 optical observation
  95. GRB030131, BVRcIc field photometry
  96. Possible GRB030323 localized by INTEGRAL
  97. IPN triangulation of GRB030325 (final analysis)
  98. GRB030323: Detection on 2003/03/24
  99. IPN triangulation of GRB030326 (single small error box)
  100. GRB 030323: SARA Optical Observations

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