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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"

39254 results found.

  1. GRB030324: Candidate Optical Afterglow
  2. IPN triangulation of GRB030414 (small error box)
  3. GRB 030413: Optical Observations
  4. GRB 030329 Rc observations
  5. IPN triangulation of GRB030413 (small error box)
  6. IPN triangulation of GRB030410 (annulus)
  7. Superluminal motion in GRB 030329 (Correction)
  8. Superluminal motion in GRB 030329
  9. GRB 030329 and SN 2003dh
  10. GRB030329, optical position
  11. GRB 030329 VLBA Observations
  12. IPN triangulation of GRB030406 (small error box)
  13. IPN triangulation of GRB050403 (small error box)
  14. IPN triangulation of GRB030403 (annulus)
  15. GRB 030329: BVRI photometry at Asiago
  16. GRB 030329, light curve flattens
  17. GRB 030329: VLT V-band photometry
  18. If the SN/GRB connection confirmed
  19. GRB 030329: Supernova Confirmed
  20. GRB030329: RTT150 optical observations
  21. GRB030329: Near Infrared Observations at Gunma
  22. GRB030329: HET spectroscopic monitoring
  23. Kiso observation of the GRB030329 at April 6
  24. GRB 030329, color evolution
  25. GRB030328, UBVRcIc field photometry
  26. GRB 030329 Optical observations
  27. GRB 030329, color evolution
  28. GRB 030329: possible color change
  29. GRB030329: RTT150 optical observations
  30. GRB 030329: Supernova Spectrum Emerging
  31. GRB030329: Kiso B and R band observations
  32. GRB030329: RTT150 optical observation
  33. GRB030329: More AAVSO VR obs
  34. GRB030328: R upper limit after 6 hours by MASTER
  35. GRB 030329: BV photographic observations
  36. GRB 030329: SARA Optical Observations
  37. GRB 030329: SARA Optical Observations
  38. GRB030329, fading resumes
  39. GRB 030329, BVRI photometry
  40. SDSS 0.5m PT observations of GRB030329 (correction)
  41. SDSS 0.5m PT observations of GRB030329
  42. GRB 030329, Optical observations
  43. GRB 030329, nearby galaxies
  44. GRB030329, cessation of fading
  45. GRB030329 Radio 23/43/90 GHz observations at Nobeyama
  46. GRB 030329: Sub-millimeter detection
  47. GRB 030329: SARA Optical Observations
  48. GRB 030329: SARA Optical Observations
  49. OT GRB light curves and SN predictions
  50. GRB030329, optical observation
  51. GRB030329, new UBVRcIc field photometry
  52. GRB 030329, light curve and SN prediction
  53. GRB030329: optical observations at Tokyo Tech
  54. GRB 030329: optical observations
  55. GRB030329: multiple re-brightening phases
  56. GRB 030329, BRI photometry
  57. GRB 030329 , SPM optical observations
  58. GRB 030329: Radio observations at GMRT
  59. Further AAVSO V,B,R observations of GRB030329
  60. GRB 030329: Additional Mt. Laguna Optical Observations
  61. GRB 030329: SARA Optical Observations
  62. GRB 030329: Observations with ANDICAM
  63. GRB030329: further optical photometry and evidence for a light curve discontinuity
  64. GRB 030329: Correction to GCN 2056
  65. GRB 030329: fitting parameters and re-brightening
  66. GRB 030329: KAIT optical photometry
  67. GRB030329 Further RBO Optical Observations
  68. triangulation of GRB 030331 (single error box)
  69. GRB030329 - OT rebrightens
  70. GRB 030329: SARA Optical Observations
  71. AAVSO V & R observations of GRB030329
  72. IPN triangulation of GRB030331 (annulus)
  73. GRB 030329: optical observations
  74. IPN triangulation of GRB030329b (large error box)
  75. GRB 030329: beginning of the new fading phase in optical band
  76. GRB 030329, optical spectroscopy
  77. GRB 030329: fading X-ray afterglow with RXTE
  78. GRB 030329: optical photometry
  79. Photometry of GRB030329 - Constant OT Magnitude
  80. GRB 030329, R-band observations
  81. GRB 030329, R-band light curve
  82. GRB 030329: further optical observations
  83. GRB030329 - OT brightens
  84. GRB 030329: OT observations at Kanazawa
  85. GRB030329 15 GHz radio observation
  86. GRB 030329 RBO V Optical Observations
  87. GRB 030329, optical photometry
  88. GRB030329: Near Infrared Observations
  89. 030331 NOT A GRB
  90. INTEGRAL GRB 030331
  91. GRB 030324: Optical and NIR Observations
  92. GRB 030328, optical photometry
  93. GRB030329: R band light curve by MASTER
  94. GRB030329 - Light curve flattening
  95. GRB 030329: SARA Optical Observations
  96. GRB 030324, optical search
  97. GRB030329 - near contemporaneous optical limits from CONCAM
  98. GRB 030329, optical observations
  99. GRB 030329: Light curve observed during the change of its slope.
  100. GRB030329, BVRcIc field photometry

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