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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"

23685 results found.

  1. GRB 030413: Optical Observations
  2. IPN triangulation of GRB030413 (small error box)
  3. GRB 030329 and SN 2003dh
  4. IPN triangulation of GRB030406 (small error box)
  5. IPN triangulation of GRB050403 (small error box)
  6. IPN triangulation of GRB030403 (annulus)
  7. GRB 030329: VLT V-band photometry
  8. GRB 030329: Supernova Confirmed
  9. GRB030329: RTT150 optical observations
  10. GRB030329: Near Infrared Observations at Gunma
  11. GRB030329: HET spectroscopic monitoring
  12. Kiso observation of the GRB030329 at April 6
  13. GRB030328, UBVRcIc field photometry
  14. GRB 030329: possible color change
  15. GRB030329: RTT150 optical observations
  16. GRB 030329: Supernova Spectrum Emerging
  17. GRB030329: RTT150 optical observation
  18. GRB030328: R upper limit after 6 hours by MASTER
  19. GRB 030329, Optical observations
  20. GRB 030329, nearby galaxies
  21. GRB030329: final R-band light curve by MASTER
  22. GRB030329 Radio 23/43/90 GHz observations at Nobeyama
  23. GRB 030329: SARA Optical Observations
  24. GRB030329, new UBVRcIc field photometry
  25. GRB030329: optical observations at Tokyo Tech
  26. GRB 030329: optical observations
  27. GRB 030329 , SPM optical observations
  28. GRB030329: Optical observations at Teramo
  29. GRB 030329: SARA Optical Observations
  30. GRB 030329: Observations with ANDICAM
  31. GRB030329 Further RBO Optical Observations
  32. triangulation of GRB 030331 (single error box)
  33. GRB030329 - OT rebrightens
  34. GRB 030329: SARA Optical Observations
  35. IPN triangulation of GRB030329b (large error box)
  36. GRB 030329: beginning of the new fading phase in optical band
  37. GRB 030329, optical spectroscopy
  38. GRB 030329: optical photometry
  39. Photometry of GRB030329 - Constant OT Magnitude
  40. GRB 030329, R-band light curve
  41. GRB 030329: further optical observations
  42. GRB030329 - OT brightens
  43. GRB 030329 RBO V Optical Observations
  44. GRB 030329, optical photometry
  45. GRB030329: Near Infrared Observations
  46. GRB 030324: Optical and NIR Observations
  47. GRB 030328, optical photometry
  48. GRB030329: R band light curve by MASTER
  49. GRB 030329: SARA Optical Observations
  50. GRB 030324, optical search
  51. GRB030329b: detection by Konus-Wind and Helicon-CoronasF
  52. GRB 030329: Light curve observed during the change of its slope.
  53. GRB030329, BVRcIc field photometry
  54. GRB030329, SPM optical observations
  55. GRB 030329: Optical Decay
  56. Redshift of GRB 030329
  57. GRB030329 optical observations
  58. GRB030329: optical spectroscopy with the TNG
  59. GRB 030329: Radio Observations
  60. GRB 030329, optical spectroscopy
  61. GRB 030329: still bright
  62. GRB 030329: Optical pre-Imaging
  63. GRB 030329: visual observations
  64. GRB 030323: Gemini South VRI obsevations.
  65. GRB 030329: optical observations
  66. GRB030329: Upper limits from recent and historical observations.
  67. GRB030329 (=H2652): A Long, Extremely Bright GRB Localized by the HETE WXM and SXC
  68. GRB 030329: precise position from Kyoto images
  69. GRB 030328 Optical Observations
  70. GRB030328: Decay index
  71. GRB 030328: optical observations
  72. GRB 030329: Optical afterglow fading
  73. GRB 030329: OT candidate
  74. GRB030328: optical spectroscopy at TNG
  75. GRB030328: optical photometry at the TNG
  76. GRB 030328, optical spectroscopy
  77. GRB 030328, optical observations
  78. GRB030328 (=H2650): A Long, Bright GRB Localized by the HETE WXM and SXC
  79. GRB030324 optical observation
  80. GRB030131, BVRcIc field photometry
  81. IPN triangulation of GRB030325 (final analysis)
  82. GRB030323: Detection on 2003/03/24
  83. IPN triangulation of GRB030326 (single small error box)
  84. GRB 030323: SARA Optical Observations
  85. IPN triangulation of GRB030325 (single small error box)
  86. IPN triangulation of GRB030325 (two small error boxes)
  87. GRB 030324: TAROT optical observations
  88. GRB030323: Upper limits from recent and historical observations.
  89. GRB030323 (=H2640): A Faint, Long GRB Localized by the HETE WXM and SXC
  90. GRB030324 (=H2641): A Long GRB Localized in Real Time by the HETE WXM
  91. GRB030324 (=H2641): A Long GRB Localized in Real Time by the HETE WXM
  92. GRB030324, BVRcIc field photometry
  93. GRB030323, BVRcIc field calibration
  94. GRB 030324, optical observations
  95. IPN triangulation of GRB030320B (annulus)
  96. IPN triangulation of GRB030320 (small error box)
  97. IPN triangulation of GRB030320
  98. Possible GRB 030320 localized by INTEGRAL
  99. IPN upper limit to a GRB associated with SN2003L
  100. IPN triangulation of GRB030317 (annulus)

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