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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"

37581 results found.

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

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