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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"
  1. SDSS 0.5m PT observations of GRB030329
  2. GRB 030329, Optical observations
  3. GRB 030329, nearby galaxies
  4. GRB030329, cessation of fading
  5. GRB030329: final R-band light curve by MASTER
  6. GRB030329 - more 15 GHz radio data
  7. GRB030329 Radio 23/43/90 GHz observations at Nobeyama
  8. GRB 030329: Sub-millimeter detection
  9. GRB 030329: SARA Optical Observations
  10. GRB 030329: SARA Optical Observations
  11. OT GRB light curves and SN predictions
  12. GRB030329, optical observation
  13. GRB030329, optical observation
  14. GRB030329, new UBVRcIc field photometry
  15. GRB 030329, light curve and SN prediction
  16. GRB030329: optical observations at Tokyo Tech
  17. GRB 030329: optical observations
  18. GRB030329: multiple re-brightening phases
  19. GRB 030329, BRI photometry
  20. GRB030328: Full Observation, X-ray Fading and Spectrum Measured
  21. GRB 030329 , SPM optical observations
  22. GRB030329: Optical observations at Teramo
  23. GRB 030329: Radio observations at GMRT
  24. GRB030329: more 15GHz observations
  25. Further AAVSO V,B,R observations of GRB030329
  26. GRB 030329: Additional Mt. Laguna Optical Observations
  27. GRB 030329: SARA Optical Observations
  28. GRB 030329: Observations with ANDICAM
  29. GRB030329: Optical observations
  30. GRB030329: further optical photometry and evidence for a light curve discontinuity
  31. GRB 030329: Correction to GCN 2056
  32. GRB 030329: fitting parameters and re-brightening
  33. GRB 030329: KAIT optical photometry
  34. GRB030329 Further RBO Optical Observations
  35. triangulation of GRB 030331 (single error box)
  36. GRB030329 - OT rebrightens
  37. GRB 030329: SARA Optical Observations
  38. AAVSO V & R observations of GRB030329
  39. IPN triangulation of GRB030331 (annulus)
  40. GRB 030329: optical observations
  41. IPN triangulation of GRB030329b (large error box)
  42. GRB 030329: beginning of the new fading phase in optical band
  43. GRB 030329, optical spectroscopy
  44. GRB 030329: fading X-ray afterglow with RXTE
  45. GRB 030329: optical photometry
  46. GRB030329: Optical observations
  47. Photometry of GRB030329 - Constant OT Magnitude
  48. GRB 030329, R-band observations
  49. GRB 030329, R-band light curve
  50. GRB 030329: further optical observations
  51. GRB030329 - OT brightens
  52. GRB 030329: OT observations at Kanazawa
  53. GRB030329 15 GHz radio observation
  54. GRB 030329 RBO V Optical Observations
  55. GRB 030329, optical photometry
  56. GRB030329: Near Infrared Observations
  57. 030331 NOT A GRB
  58. INTEGRAL GRB 030331
  59. GRB 030324: Optical and NIR Observations
  60. GRB 030328, optical photometry
  61. GRB030329: R band light curve by MASTER
  62. GRB030329 - Light curve flattening
  63. GRB 030329: SARA Optical Observations
  64. GRB 030324, optical search
  65. GRB030329 - near contemporaneous optical limits from CONCAM
  66. GRB030329: R and B observations
  67. GRB 030329, optical observations
  68. GRB030329: Optical observations
  69. GRB030328: X-ray Fading and Spectrum Measured with Chandra
  70. GRB030329a: detection by Konus-Wind
  71. GRB030329b: detection by Konus-Wind and Helicon-CoronasF
  72. GRB 030329: Light curve observed during the change of its slope.
  73. GRB030329, BVRcIc field photometry
  74. GRB030329, SPM optical observations
  75. GRB 030329: Optical Decay
  76. Redshift of GRB 030329
  77. GRB030329: ROTSE network observes steepening of decay curve
  78. GRB 030329, optical photometry
  79. GRB 030329: Optical decay and synthesis
  80. GRB030329 optical observations
  81. GRB030329: optical spectroscopy with the TNG
  82. GRB 030329: Radio Observations
  83. GRB 030329, optical spectroscopy
  84. GRB 030329: still bright
  85. GRB 030329: Optical pre-Imaging
  86. GRB 030329: visual observations
  87. GRB 030329: Upper limit from 5.6 hours before trigger
  88. GRB030328: R optical observation
  89. GRB030328: X-ray Afterglow Observed with Chandra
  90. GRB 030323: Gemini South VRI obsevations.
  91. GRB030329: Optical observations
  92. GRB 030329, R-band observations, supplement
  93. GRB030329 optical observations
  94. GRB030329:optical observations by MASTER
  95. GRB 030329: optical observations
  96. GRB 030329, R-band observations
  97. GRB 030329: OT B and R photometry, decline rate
  98. GRB030329: Upper limits from recent and historical observations.
  99. GRB030329 (=H2652): A Long, Extremely Bright GRB Localized by the HETE WXM and SXC
  100. RXTE detection of GRB 030329 afterglow

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