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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"

37680 results found.

  1. GRB 030329: Sub-millimeter detection
  2. GRB 030329: SARA Optical Observations
  3. GRB 030329: SARA Optical Observations
  4. OT GRB light curves and SN predictions
  5. GRB030329, optical observation
  6. GRB030329, new UBVRcIc field photometry
  7. GRB 030329, light curve and SN prediction
  8. GRB030329: optical observations at Tokyo Tech
  9. GRB 030329: optical observations
  10. GRB030329: multiple re-brightening phases
  11. GRB 030329, BRI photometry
  12. GRB 030329 , SPM optical observations
  13. GRB 030329: Radio observations at GMRT
  14. Further AAVSO V,B,R observations of GRB030329
  15. GRB 030329: Additional Mt. Laguna Optical Observations
  16. GRB 030329: SARA Optical Observations
  17. GRB 030329: Observations with ANDICAM
  18. GRB030329: further optical photometry and evidence for a light curve discontinuity
  19. GRB 030329: Correction to GCN 2056
  20. GRB 030329: fitting parameters and re-brightening
  21. GRB 030329: KAIT optical photometry
  22. GRB030329 Further RBO Optical Observations
  23. triangulation of GRB 030331 (single error box)
  24. GRB030329 - OT rebrightens
  25. GRB 030329: SARA Optical Observations
  26. AAVSO V & R observations of GRB030329
  27. IPN triangulation of GRB030331 (annulus)
  28. GRB 030329: optical observations
  29. IPN triangulation of GRB030329b (large error box)
  30. GRB 030329: beginning of the new fading phase in optical band
  31. GRB 030329, optical spectroscopy
  32. GRB 030329: fading X-ray afterglow with RXTE
  33. GRB 030329: optical photometry
  34. Photometry of GRB030329 - Constant OT Magnitude
  35. GRB 030329, R-band observations
  36. GRB 030329, R-band light curve
  37. GRB 030329: further optical observations
  38. GRB030329 - OT brightens
  39. GRB 030329: OT observations at Kanazawa
  40. GRB030329 15 GHz radio observation
  41. GRB 030329 RBO V Optical Observations
  42. GRB 030329, optical photometry
  43. GRB030329: Near Infrared Observations
  44. 030331 NOT A GRB
  45. INTEGRAL GRB 030331
  46. GRB 030324: Optical and NIR Observations
  47. GRB 030328, optical photometry
  48. GRB030329: R band light curve by MASTER
  49. GRB030329 - Light curve flattening
  50. GRB 030329: SARA Optical Observations
  51. GRB 030324, optical search
  52. GRB030329 - near contemporaneous optical limits from CONCAM
  53. GRB 030329, optical observations
  54. GRB 030329: Light curve observed during the change of its slope.
  55. GRB030329, BVRcIc field photometry
  56. GRB030329, SPM optical observations
  57. GRB 030329: Optical Decay
  58. Redshift of GRB 030329
  59. GRB030329: ROTSE network observes steepening of decay curve
  60. GRB 030329, optical photometry
  61. GRB 030329: Optical decay and synthesis
  62. GRB 030329: Radio Observations
  63. GRB 030329, optical spectroscopy
  64. GRB 030329: still bright
  65. GRB 030329: Optical pre-Imaging
  66. GRB 030329: visual observations
  67. GRB 030329: Upper limit from 5.6 hours before trigger
  68. GRB030328: R optical observation
  69. GRB 030323: Gemini South VRI obsevations.
  70. GRB030329: Optical observations
  71. GRB 030329, R-band observations, supplement
  72. GRB030329:optical observations by MASTER
  73. GRB 030329: optical observations
  74. GRB 030329, R-band observations
  75. GRB 030329: OT B and R photometry, decline rate
  76. GRB030329: Upper limits from recent and historical observations.
  77. GRB030329 (=H2652): A Long, Extremely Bright GRB Localized by the HETE WXM and SXC
  78. RXTE detection of GRB 030329 afterglow
  79. GRB 030329: Optical Afterglow Observations
  80. GRB 030329: precise position from Kyoto images
  81. GRB 030328 Optical Observations
  82. GRB 030328: Optical observations
  83. GRB 030328: optical observations
  84. GRB 030329: Optical afterglow fading
  85. GRB 030329 follow-up
  86. GRB 030329: Optical afterglow candidate
  87. GRB 030329: OT candidate
  88. GRB 030329: Optical afterglow candidate
  89. GRB 030328: OT photometry
  90. VLT spectra of GRB 030328
  91. GRB 030328, optical spectroscopy
  92. GRB 030328, optical observations
  93. GRB030328 (=H2650): A Long, Bright GRB Localized by the HETE WXM and SXC
  94. GRB 030328: Optical observations
  95. Re: GRB 030328: Finding chart
  96. GRB 030328: Finding chart
  97. GRB 030328: Optical afterglow candidate
  98. GRB030131, BVRcIc field photometry
  99. Possible GRB030323 localized by INTEGRAL
  100. IPN triangulation of GRB030325 (final analysis)

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