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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"

37149 results found.

  1. GRB030329: RTT150 optical observation
  2. GRB030329: More AAVSO VR obs
  3. GRB030328: R upper limit after 6 hours by MASTER
  4. GRB 030329: BV photographic observations
  5. GRB 030329: SARA Optical Observations
  6. GRB 030329: SARA Optical Observations
  7. GRB030329, fading resumes
  8. GRB 030329, BVRI photometry
  9. SDSS 0.5m PT observations of GRB030329 (correction)
  10. SDSS 0.5m PT observations of GRB030329
  11. GRB 030329, Optical observations
  12. GRB 030329, nearby galaxies
  13. GRB030329, cessation of fading
  14. GRB030329: final R-band light curve by MASTER
  15. GRB030329 Radio 23/43/90 GHz observations at Nobeyama
  16. GRB 030329: Sub-millimeter detection
  17. GRB 030329: SARA Optical Observations
  18. GRB 030329: SARA Optical Observations
  19. OT GRB light curves and SN predictions
  20. GRB030329, optical observation
  21. GRB030329, new UBVRcIc field photometry
  22. GRB 030329, light curve and SN prediction
  23. GRB030329: optical observations at Tokyo Tech
  24. GRB 030329: optical observations
  25. GRB030329: multiple re-brightening phases
  26. GRB 030329, BRI photometry
  27. GRB 030329 , SPM optical observations
  28. GRB 030329: Radio observations at GMRT
  29. Further AAVSO V,B,R observations of GRB030329
  30. GRB 030329: Additional Mt. Laguna Optical Observations
  31. GRB 030329: SARA Optical Observations
  32. GRB 030329: Observations with ANDICAM
  33. GRB030329: further optical photometry and evidence for a light curve discontinuity
  34. GRB 030329: Correction to GCN 2056
  35. GRB 030329: fitting parameters and re-brightening
  36. GRB 030329: KAIT optical photometry
  37. GRB030329 Further RBO Optical Observations
  38. triangulation of GRB 030331 (single error box)
  39. GRB030329 - OT rebrightens
  40. GRB 030329: SARA Optical Observations
  41. AAVSO V & R observations of GRB030329
  42. IPN triangulation of GRB030331 (annulus)
  43. GRB 030329: optical observations
  44. IPN triangulation of GRB030329b (large error box)
  45. GRB 030329: beginning of the new fading phase in optical band
  46. GRB 030329, optical spectroscopy
  47. GRB 030329: fading X-ray afterglow with RXTE
  48. GRB 030329: optical photometry
  49. Photometry of GRB030329 - Constant OT Magnitude
  50. GRB 030329, R-band observations
  51. GRB 030329, R-band light curve
  52. GRB 030329: further optical observations
  53. GRB030329 - OT brightens
  54. GRB 030329: OT observations at Kanazawa
  55. GRB030329 15 GHz radio observation
  56. GRB 030329 RBO V Optical Observations
  57. GRB 030329, optical photometry
  58. GRB030329: Near Infrared Observations
  59. 030331 NOT A GRB
  60. INTEGRAL GRB 030331
  61. GRB 030324: Optical and NIR Observations
  62. GRB 030328, optical photometry
  63. GRB030329: R band light curve by MASTER
  64. GRB030329 - Light curve flattening
  65. GRB 030329: SARA Optical Observations
  66. GRB 030324, optical search
  67. GRB030329 - near contemporaneous optical limits from CONCAM
  68. GRB 030329, optical observations
  69. GRB030328: X-ray Fading and Spectrum Measured with Chandra
  70. GRB 030329: Light curve observed during the change of its slope.
  71. GRB030329, BVRcIc field photometry
  72. GRB030329, SPM optical observations
  73. GRB 030329: Optical Decay
  74. Redshift of GRB 030329
  75. GRB030329: ROTSE network observes steepening of decay curve
  76. GRB 030329, optical photometry
  77. GRB 030329: Optical decay and synthesis
  78. GRB030329: optical spectroscopy with the TNG
  79. GRB 030329: Radio Observations
  80. GRB 030329, optical spectroscopy
  81. GRB 030329: still bright
  82. GRB 030329: Optical pre-Imaging
  83. GRB 030329: visual observations
  84. GRB 030329: Upper limit from 5.6 hours before trigger
  85. GRB030328: R optical observation
  86. GRB030328: X-ray Afterglow Observed with Chandra
  87. GRB 030323: Gemini South VRI obsevations.
  88. GRB030329: Optical observations
  89. GRB 030329, R-band observations, supplement
  90. GRB030329:optical observations by MASTER
  91. GRB 030329: optical observations
  92. GRB 030329, R-band observations
  93. GRB 030329: OT B and R photometry, decline rate
  94. GRB030329: Upper limits from recent and historical observations.
  95. GRB030329 (=H2652): A Long, Extremely Bright GRB Localized by the HETE WXM and SXC
  96. RXTE detection of GRB 030329 afterglow
  97. GRB 030329: Optical Afterglow Observations
  98. GRB 030329: precise position from Kyoto images
  99. GRB 030328 Optical Observations
  100. GRB 030328: Optical observations

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