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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"

26684 results found.

  1. GRB030329, optical position
  2. IPN triangulation of GRB030406 (small error box)
  3. IPN triangulation of GRB050403 (small error box)
  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. GRB030329: Kiso B and R band observations
  10. GRB030329: More AAVSO VR obs
  11. GRB 030329: BV photographic observations
  12. SDSS 0.5m PT observations of GRB030329 (correction)
  13. SDSS 0.5m PT observations of GRB030329
  14. GRB 030329, nearby galaxies
  15. GRB030329: final R-band light curve by MASTER
  16. GRB030329, optical observation
  17. GRB030329, new UBVRcIc field photometry
  18. GRB 030329, light curve and SN prediction
  19. GRB030328: Full Observation, X-ray Fading and Spectrum Measured
  20. GRB030329: Optical observations at Teramo
  21. GRB 030329: Radio observations at GMRT
  22. GRB 030329: Additional Mt. Laguna Optical Observations
  23. GRB 030329: Observations with ANDICAM
  24. GRB 030329: fitting parameters and re-brightening
  25. triangulation of GRB 030331 (single error box)
  26. GRB 030329: optical observations
  27. GRB 030329, optical spectroscopy
  28. GRB 030329: fading X-ray afterglow with RXTE
  29. GRB 030329: OT observations at Kanazawa
  30. GRB 030324: Optical and NIR Observations
  31. GRB030329: R band light curve by MASTER
  32. GRB030329 - Light curve flattening
  33. GRB 030324, optical search
  34. GRB 030329, optical observations
  35. GRB030328: X-ray Fading and Spectrum Measured with Chandra
  36. GRB030329a: detection by Konus-Wind
  37. GRB030329b: detection by Konus-Wind and Helicon-CoronasF
  38. GRB 030329: Light curve observed during the change of its slope.
  39. GRB030329, BVRcIc field photometry
  40. GRB030329, SPM optical observations
  41. GRB030329 optical observations
  42. GRB 030329: Optical pre-Imaging
  43. GRB 030329: Upper limit from 5.6 hours before trigger
  44. GRB030328: X-ray Afterglow Observed with Chandra
  45. GRB 030329, R-band observations
  46. GRB030329: Upper limits from recent and historical observations.
  47. GRB030329 (=H2652): A Long, Extremely Bright GRB Localized by the HETE WXM and SXC
  48. RXTE detection of GRB 030329 afterglow
  49. GRB 030329: Optical Afterglow Observations
  50. GRB 030329: precise position from Kyoto images
  51. GRB 030328: optical observations
  52. GRB 030329: Optical afterglow fading
  53. GRB 030328: OT photometry
  54. GRB030328: optical spectroscopy at TNG
  55. GRB030328: optical photometry at the TNG
  56. GRB030328 (=H2650): A Long, Bright GRB Localized by the HETE WXM and SXC
  57. GRB 030328: Optical observations
  58. GRB 030328: Optical afterglow candidate
  59. GRB030324 optical observation
  60. GRB030131, BVRcIc field photometry
  61. Possible GRB030323 localized by INTEGRAL
  62. GRB030323: Detection on 2003/03/24
  63. IPN triangulation of GRB030326 (single small error box)
  64. IPN triangulation of GRB030325 (two small error boxes)
  65. GRB030323: V, R, I photometry
  66. GRB 030324 (HETE #2641): Optical observations
  67. GRB030324, Optical Observations
  68. GRB030323 (=H2640): A Faint, Long GRB Localized by the HETE WXM and SXC
  69. GRB030324 (=H2641): A Long GRB Localized in Real Time by the HETE WXM
  70. VLT/FORS2 spectra of GRB 030323
  71. GRB030323, optical observations
  72. GRB030324, BVRcIc field photometry
  73. GRB030323, BVRcIc field calibration
  74. GRB 030324, optical observations
  75. IPN triangulation of GRB030320 (small error box)
  76. Possible GRB 030320 localized by INTEGRAL
  77. IPN upper limit to a GRB associated with SN2003L
  78. IPN triangulation of GRB030306 (single small error box - REVISED)
  79. IPN triangulation of GRB030306 (single small error box)
  80. IPN triangulation of GRB030306 (two small error boxes)
  81. GRB030226: Analysis of Chandra data
  82. IPN triangulation of GRB030304 (annulus)
  83. GRB030226, BVRc observations
  84. Chandra detection of the X-ray afterglow of GRB 030226
  85. GRB 030226, further optical/NIR imaging
  86. GRB030227: Kiso optical upper limit
  87. GRB030227, BVRcIc field photometry
  88. GRB030226, BVRcIc field calibration
  89. GRB 030228, optical observations
  90. GRB 030227: Confirmed Optical Afterglow (S1-A)
  91. GRB 030227: fading of candidate optical afterglow 'S1-A'
  92. GRB030227:Optical observations
  93. GRB 030227, possible optical counterpart of XMM-Newton source
  94. XMM-Newton observation of GRB030227
  95. GRB030227: Kiso optical observations
  96. GRB 030227: Kyoto optical observation
  97. GRB 030226 spectroscopy
  98. GRB030227: refined INTEGRAL position
  99. GRB030227 localized by INTEGRAL
  100. GRB 030226 : Predicted light curve

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