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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"

45679 results found.

  1. GRB 030329, color evolution
  2. GRB 030329: possible color change
  3. GRB030329: RTT150 optical observations
  4. GRB 030329: Supernova Spectrum Emerging
  5. GRB030329: Kiso B and R band observations
  6. GRB030329: RTT150 optical observation
  7. GRB030329: More AAVSO VR obs
  8. GRB030328: R upper limit after 6 hours by MASTER
  9. GRB 030329: BV photographic observations
  10. GRB 030329: SARA Optical Observations
  11. GRB 030329: SARA Optical Observations
  12. GRB030329, fading resumes
  13. GRB 030329, BVRI photometry
  14. GRB030329: Optical observations
  15. SDSS 0.5m PT observations of GRB030329 (correction)
  16. SDSS 0.5m PT observations of GRB030329
  17. GRB 030329, Optical observations
  18. GRB 030329, nearby galaxies
  19. GRB030329, cessation of fading
  20. GRB030329: final R-band light curve by MASTER
  21. GRB030329 - more 15 GHz radio data
  22. GRB030329 Radio 23/43/90 GHz observations at Nobeyama
  23. GRB 030329: Sub-millimeter detection
  24. GRB 030329: SARA Optical Observations
  25. GRB 030329: SARA Optical Observations
  26. OT GRB light curves and SN predictions
  27. GRB030329, optical observation
  28. GRB030329, optical observation
  29. GRB030329, new UBVRcIc field photometry
  30. GRB 030329, light curve and SN prediction
  31. GRB030329: optical observations at Tokyo Tech
  32. GRB 030329: optical observations
  33. GRB030329: multiple re-brightening phases
  34. GRB 030329, BRI photometry
  35. GRB030328: Full Observation, X-ray Fading and Spectrum Measured
  36. GRB 030329 , SPM optical observations
  37. GRB030329: Optical observations at Teramo
  38. GRB 030329: Radio observations at GMRT
  39. Further AAVSO V,B,R observations of GRB030329
  40. GRB 030329: Additional Mt. Laguna Optical Observations
  41. GRB 030329: SARA Optical Observations
  42. GRB 030329: Observations with ANDICAM
  43. GRB030329: Optical observations
  44. GRB030329: further optical photometry and evidence for a light curve discontinuity
  45. GRB 030329: Correction to GCN 2056
  46. GRB 030329: fitting parameters and re-brightening
  47. GRB 030329: KAIT optical photometry
  48. GRB030329 Further RBO Optical Observations
  49. triangulation of GRB 030331 (single error box)
  50. GRB030329 - OT rebrightens
  51. GRB 030329: SARA Optical Observations
  52. AAVSO V & R observations of GRB030329
  53. IPN triangulation of GRB030331 (annulus)
  54. GRB 030329: optical observations
  55. IPN triangulation of GRB030329b (large error box)
  56. GRB 030329: beginning of the new fading phase in optical band
  57. GRB 030329, optical spectroscopy
  58. GRB 030329: fading X-ray afterglow with RXTE
  59. GRB 030329: optical photometry
  60. GRB030329: Optical observations
  61. Photometry of GRB030329 - Constant OT Magnitude
  62. GRB 030329, R-band observations
  63. GRB 030329, R-band light curve
  64. GRB 030329: further optical observations
  65. GRB030329 - OT brightens
  66. GRB 030329: OT observations at Kanazawa
  67. GRB030329 15 GHz radio observation
  68. GRB 030329 RBO V Optical Observations
  69. GRB 030329, optical photometry
  70. GRB030329: Near Infrared Observations
  71. INTEGRAL GRB 030331
  72. GRB 030324: Optical and NIR Observations
  73. GRB 030328, optical photometry
  74. GRB030329: R band light curve by MASTER
  75. GRB030329 - Light curve flattening
  76. GRB 030329: SARA Optical Observations
  77. GRB 030324, optical search
  78. GRB030329 - near contemporaneous optical limits from CONCAM
  79. GRB030329: R and B observations
  80. GRB 030329, optical observations
  81. GRB030329: Optical observations
  82. GRB030328: X-ray Fading and Spectrum Measured with Chandra
  83. GRB030329a: detection by Konus-Wind
  84. GRB030329b: detection by Konus-Wind and Helicon-CoronasF
  85. GRB 030329: Light curve observed during the change of its slope.
  86. GRB030329, BVRcIc field photometry
  87. GRB030329, SPM optical observations
  88. GRB 030329: Optical Decay
  89. Redshift of GRB 030329
  90. GRB030329: ROTSE network observes steepening of decay curve
  91. GRB 030329, optical photometry
  92. GRB 030329: Optical decay and synthesis
  93. GRB030329 optical observations
  94. GRB030329: optical spectroscopy with the TNG
  95. GRB 030329: Radio Observations
  96. GRB 030329, optical spectroscopy
  97. GRB 030329: still bright
  98. GRB 030329: Optical pre-Imaging
  99. GRB 030329: visual observations
  100. GRB 030329: Upper limit from 5.6 hours before trigger

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