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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"

36114 results found.

  1. IPN triangulation of GRB030406 (small error box)
  2. IPN triangulation of GRB050403 (small error box)
  3. IPN triangulation of GRB030403 (annulus)
  4. GRB 030329: BVRI photometry at Asiago
  5. GRB 030329, light curve flattens
  6. GRB 030329: VLT V-band photometry
  7. If the SN/GRB connection confirmed
  8. GRB 030329: Supernova Confirmed
  9. GRB030329: RTT150 optical observations
  10. GRB030329: Near Infrared Observations at Gunma
  11. GRB030329: HET spectroscopic monitoring
  12. Kiso observation of the GRB030329 at April 6
  13. GRB 030329, color evolution
  14. GRB030328, UBVRcIc field photometry
  15. GRB 030329 Optical observations
  16. GRB 030329, color evolution
  17. GRB 030329: possible color change
  18. GRB030329: RTT150 optical observations
  19. GRB 030329: Supernova Spectrum Emerging
  20. GRB030329: Kiso B and R band observations
  21. GRB030329: RTT150 optical observation
  22. GRB030329: More AAVSO VR obs
  23. GRB030328: R upper limit after 6 hours by MASTER
  24. GRB 030329: BV photographic observations
  25. GRB 030329: SARA Optical Observations
  26. GRB 030329: SARA Optical Observations
  27. GRB030329, fading resumes
  28. GRB 030329, BVRI photometry
  29. SDSS 0.5m PT observations of GRB030329 (correction)
  30. SDSS 0.5m PT observations of GRB030329
  31. GRB 030329, Optical observations
  32. GRB 030329, nearby galaxies
  33. GRB030329, cessation of fading
  34. GRB030329 Radio 23/43/90 GHz observations at Nobeyama
  35. GRB 030329: Sub-millimeter detection
  36. GRB 030329: SARA Optical Observations
  37. GRB 030329: SARA Optical Observations
  38. OT GRB light curves and SN predictions
  39. GRB030329, optical observation
  40. GRB030329, new UBVRcIc field photometry
  41. GRB 030329, light curve and SN prediction
  42. GRB030329: optical observations at Tokyo Tech
  43. GRB 030329: optical observations
  44. GRB030329: multiple re-brightening phases
  45. GRB 030329, BRI photometry
  46. GRB 030329 , SPM optical observations
  47. GRB 030329: Radio observations at GMRT
  48. Further AAVSO V,B,R observations of GRB030329
  49. GRB 030329: Additional Mt. Laguna Optical Observations
  50. GRB 030329: SARA Optical Observations
  51. GRB 030329: Observations with ANDICAM
  52. GRB030329: further optical photometry and evidence for a light curve discontinuity
  53. GRB 030329: Correction to GCN 2056
  54. GRB 030329: fitting parameters and re-brightening
  55. GRB 030329: KAIT optical photometry
  56. GRB030329 Further RBO Optical Observations
  57. triangulation of GRB 030331 (single error box)
  58. GRB030329 - OT rebrightens
  59. GRB 030329: SARA Optical Observations
  60. AAVSO V & R observations of GRB030329
  61. IPN triangulation of GRB030331 (annulus)
  62. GRB 030329: optical observations
  63. IPN triangulation of GRB030329b (large error box)
  64. GRB 030329: beginning of the new fading phase in optical band
  65. GRB 030329, optical spectroscopy
  66. GRB 030329: fading X-ray afterglow with RXTE
  67. GRB 030329: optical photometry
  68. Photometry of GRB030329 - Constant OT Magnitude
  69. GRB 030329, R-band observations
  70. GRB 030329, R-band light curve
  71. GRB 030329: further optical observations
  72. GRB030329 - OT brightens
  73. GRB 030329: OT observations at Kanazawa
  74. GRB030329 15 GHz radio observation
  75. GRB 030329 RBO V Optical Observations
  76. GRB 030329, optical photometry
  77. GRB030329: Near Infrared Observations
  78. 030331 NOT A GRB
  79. INTEGRAL GRB 030331
  80. GRB 030324: Optical and NIR Observations
  81. GRB 030328, optical photometry
  82. GRB030329: R band light curve by MASTER
  83. GRB030329 - Light curve flattening
  84. GRB 030329: SARA Optical Observations
  85. GRB 030324, optical search
  86. GRB030329 - near contemporaneous optical limits from CONCAM
  87. GRB 030329, optical observations
  88. GRB 030329: Light curve observed during the change of its slope.
  89. GRB030329, BVRcIc field photometry
  90. GRB030329, SPM optical observations
  91. GRB 030329: Optical Decay
  92. Redshift of GRB 030329
  93. GRB030329: ROTSE network observes steepening of decay curve
  94. GRB 030329, optical photometry
  95. GRB 030329: Optical decay and synthesis
  96. GRB 030329: Radio Observations
  97. GRB 030329, optical spectroscopy
  98. GRB 030329: still bright
  99. GRB 030329: Optical pre-Imaging
  100. GRB 030329: visual observations

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