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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"

36216 results found.

  1. IPN triangulation of GRB030403 (annulus)
  2. GRB 030329: BVRI photometry at Asiago
  3. GRB 030329, light curve flattens
  4. GRB 030329: VLT V-band photometry
  5. If the SN/GRB connection confirmed
  6. GRB 030329: Supernova Confirmed
  7. GRB030329: RTT150 optical observations
  8. GRB030329: Near Infrared Observations at Gunma
  9. GRB030329: HET spectroscopic monitoring
  10. Kiso observation of the GRB030329 at April 6
  11. GRB 030329, color evolution
  12. GRB030328, UBVRcIc field photometry
  13. GRB 030329 Optical observations
  14. GRB 030329, color evolution
  15. GRB 030329: possible color change
  16. GRB030329: RTT150 optical observations
  17. GRB 030329: Supernova Spectrum Emerging
  18. GRB030329: Kiso B and R band observations
  19. GRB030329: RTT150 optical observation
  20. GRB030329: More AAVSO VR obs
  21. GRB030328: R upper limit after 6 hours by MASTER
  22. GRB 030329: BV photographic observations
  23. GRB 030329: SARA Optical Observations
  24. GRB 030329: SARA Optical Observations
  25. GRB030329, fading resumes
  26. GRB 030329, BVRI photometry
  27. SDSS 0.5m PT observations of GRB030329 (correction)
  28. SDSS 0.5m PT observations of GRB030329
  29. GRB 030329, Optical observations
  30. GRB 030329, nearby galaxies
  31. GRB030329, cessation of fading
  32. GRB030329 Radio 23/43/90 GHz observations at Nobeyama
  33. GRB 030329: Sub-millimeter detection
  34. GRB 030329: SARA Optical Observations
  35. GRB 030329: SARA Optical Observations
  36. OT GRB light curves and SN predictions
  37. GRB030329, optical observation
  38. GRB030329, new UBVRcIc field photometry
  39. GRB 030329, light curve and SN prediction
  40. GRB030329: optical observations at Tokyo Tech
  41. GRB 030329: optical observations
  42. GRB030329: multiple re-brightening phases
  43. GRB 030329, BRI photometry
  44. GRB 030329 , SPM optical observations
  45. GRB 030329: Radio observations at GMRT
  46. Further AAVSO V,B,R observations of GRB030329
  47. GRB 030329: Additional Mt. Laguna Optical Observations
  48. GRB 030329: SARA Optical Observations
  49. GRB 030329: Observations with ANDICAM
  50. GRB030329: further optical photometry and evidence for a light curve discontinuity
  51. GRB 030329: Correction to GCN 2056
  52. GRB 030329: fitting parameters and re-brightening
  53. GRB 030329: KAIT optical photometry
  54. GRB030329 Further RBO Optical Observations
  55. triangulation of GRB 030331 (single error box)
  56. GRB030329 - OT rebrightens
  57. GRB 030329: SARA Optical Observations
  58. AAVSO V & R observations of GRB030329
  59. IPN triangulation of GRB030331 (annulus)
  60. GRB 030329: optical observations
  61. IPN triangulation of GRB030329b (large error box)
  62. GRB 030329: beginning of the new fading phase in optical band
  63. GRB 030329, optical spectroscopy
  64. GRB 030329: fading X-ray afterglow with RXTE
  65. GRB 030329: optical photometry
  66. Photometry of GRB030329 - Constant OT Magnitude
  67. GRB 030329, R-band observations
  68. GRB 030329, R-band light curve
  69. GRB 030329: further optical observations
  70. GRB030329 - OT brightens
  71. GRB 030329: OT observations at Kanazawa
  72. GRB030329 15 GHz radio observation
  73. GRB 030329 RBO V Optical Observations
  74. GRB 030329, optical photometry
  75. GRB030329: Near Infrared Observations
  76. 030331 NOT A GRB
  77. INTEGRAL GRB 030331
  78. GRB 030324: Optical and NIR Observations
  79. GRB 030328, optical photometry
  80. GRB030329: R band light curve by MASTER
  81. GRB030329 - Light curve flattening
  82. GRB 030329: SARA Optical Observations
  83. GRB 030324, optical search
  84. GRB030329 - near contemporaneous optical limits from CONCAM
  85. GRB 030329, optical observations
  86. GRB 030329: Light curve observed during the change of its slope.
  87. GRB030329, BVRcIc field photometry
  88. GRB030329, SPM optical observations
  89. GRB 030329: Optical Decay
  90. Redshift of GRB 030329
  91. GRB030329: ROTSE network observes steepening of decay curve
  92. GRB 030329, optical photometry
  93. GRB 030329: Optical decay and synthesis
  94. GRB 030329: Radio Observations
  95. GRB 030329, optical spectroscopy
  96. GRB 030329: still bright
  97. GRB 030329: Optical pre-Imaging
  98. GRB 030329: visual observations
  99. GRB 030329: Upper limit from 5.6 hours before trigger
  100. GRB030328: R optical observation

Advanced

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