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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"

37162 results found.

  1. GRB 030329: Supernova Confirmed
  2. GRB030329: RTT150 optical observations
  3. GRB030329: Near Infrared Observations at Gunma
  4. GRB030329: HET spectroscopic monitoring
  5. Kiso observation of the GRB030329 at April 6
  6. GRB 030329, color evolution
  7. GRB030328, UBVRcIc field photometry
  8. GRB 030329 Optical observations
  9. GRB 030329, color evolution
  10. GRB 030329: possible color change
  11. GRB030329: RTT150 optical observations
  12. GRB 030329: Supernova Spectrum Emerging
  13. GRB030329: Kiso B and R band observations
  14. GRB030329: RTT150 optical observation
  15. GRB030329: More AAVSO VR obs
  16. GRB030328: R upper limit after 6 hours by MASTER
  17. GRB 030329: BV photographic observations
  18. GRB 030329: SARA Optical Observations
  19. GRB 030329: SARA Optical Observations
  20. GRB030329, fading resumes
  21. GRB 030329, BVRI photometry
  22. SDSS 0.5m PT observations of GRB030329 (correction)
  23. SDSS 0.5m PT observations of GRB030329
  24. GRB 030329, Optical observations
  25. GRB 030329, nearby galaxies
  26. GRB030329, cessation of fading
  27. GRB030329: final R-band light curve by MASTER
  28. GRB030329 Radio 23/43/90 GHz observations at Nobeyama
  29. GRB 030329: Sub-millimeter detection
  30. GRB 030329: SARA Optical Observations
  31. GRB 030329: SARA Optical Observations
  32. OT GRB light curves and SN predictions
  33. GRB030329, optical observation
  34. GRB030329, new UBVRcIc field photometry
  35. GRB 030329, light curve and SN prediction
  36. GRB030329: optical observations at Tokyo Tech
  37. GRB 030329: optical observations
  38. GRB030329: multiple re-brightening phases
  39. GRB 030329, BRI photometry
  40. GRB 030329 , SPM optical observations
  41. GRB 030329: Radio observations at GMRT
  42. Further AAVSO V,B,R observations of GRB030329
  43. GRB 030329: Additional Mt. Laguna Optical Observations
  44. GRB 030329: SARA Optical Observations
  45. GRB 030329: Observations with ANDICAM
  46. GRB030329: further optical photometry and evidence for a light curve discontinuity
  47. GRB 030329: Correction to GCN 2056
  48. GRB 030329: fitting parameters and re-brightening
  49. GRB 030329: KAIT optical photometry
  50. GRB030329 Further RBO Optical Observations
  51. triangulation of GRB 030331 (single error box)
  52. GRB030329 - OT rebrightens
  53. GRB 030329: SARA Optical Observations
  54. AAVSO V & R observations of GRB030329
  55. IPN triangulation of GRB030331 (annulus)
  56. GRB 030329: optical observations
  57. IPN triangulation of GRB030329b (large error box)
  58. GRB 030329: beginning of the new fading phase in optical band
  59. GRB 030329, optical spectroscopy
  60. GRB 030329: fading X-ray afterglow with RXTE
  61. GRB 030329: optical photometry
  62. Photometry of GRB030329 - Constant OT Magnitude
  63. GRB 030329, R-band observations
  64. GRB 030329, R-band light curve
  65. GRB 030329: further optical observations
  66. GRB030329 - OT brightens
  67. GRB 030329: OT observations at Kanazawa
  68. GRB030329 15 GHz radio observation
  69. GRB 030329 RBO V Optical Observations
  70. GRB 030329, optical photometry
  71. GRB030329: Near Infrared Observations
  72. 030331 NOT A GRB
  73. INTEGRAL GRB 030331
  74. GRB 030324: Optical and NIR Observations
  75. GRB 030328, optical photometry
  76. GRB030329: R band light curve by MASTER
  77. GRB030329 - Light curve flattening
  78. GRB 030329: SARA Optical Observations
  79. GRB 030324, optical search
  80. GRB030329 - near contemporaneous optical limits from CONCAM
  81. GRB 030329, optical observations
  82. GRB030328: X-ray Fading and Spectrum Measured with Chandra
  83. GRB 030329: Light curve observed during the change of its slope.
  84. GRB030329, BVRcIc field photometry
  85. GRB030329, SPM optical observations
  86. GRB 030329: Optical Decay
  87. Redshift of GRB 030329
  88. GRB030329: ROTSE network observes steepening of decay curve
  89. GRB 030329, optical photometry
  90. GRB 030329: Optical decay and synthesis
  91. GRB030329: optical spectroscopy with the TNG
  92. GRB 030329: Radio Observations
  93. GRB 030329, optical spectroscopy
  94. GRB 030329: still bright
  95. GRB 030329: Optical pre-Imaging
  96. GRB 030329: visual observations
  97. GRB 030329: Upper limit from 5.6 hours before trigger
  98. GRB030328: R optical observation
  99. GRB030328: X-ray Afterglow Observed with Chandra
  100. GRB 030323: Gemini South VRI obsevations.

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