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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"

36194 results found.

  1. GRB 001105, R-band observation
  2. IPN TRIANGULATION OF GRB001105
  3. GRB 001025B, Optical obervations
  4. GRB 991208: HST Imaging of the Host Galaxy
  5. GRB000926: R-image of the host galaxy
  6. GRB 001025B, I-band observations
  7. GRB 001025 Optical Observations
  8. GRB 001025A, optical observation
  9. IPN TRIANGULATION OF GRB001025B (SHORT/HARD)
  10. IPN triangulation of GRB001025
  11. ASM Localization of GRB 001025
  12. GRB001007, Radio observations
  13. IPN TRIANGULATION OF GRB001020
  14. GRB001019, Optical Observations
  15. GRB 001018, Possible Radio Afterglow
  16. GRB001018, Gamma Ray Observations
  17. IPN TRIANGULATION OF GRB001019
  18. IPN TRIANGULATION OF GRB001018
  19. IPN TRIANGULATION OF GRB 001017
  20. GRB 000926: Improved Absorber Redshift
  21. V,R,I band observations of GRB000926
  22. The Likely Optical/Infrared Afterglow of GRB 001011
  23. HETE positions added to GCN
  24. BeppoSAX ALERT: GRB001011
  25. GRB 001007, BVR-band observations
  26. GRB000926 - Amateur Optical Observations
  27. CONCAM null result on GRB001005
  28. IPN triangulation of GRB001007
  29. GRB 000926 : the host galaxy
  30. IPN triangulation of GRB001005
  31. GRB 000926 Chandra Observation
  32. IPN triangulation of GRB 001004
  33. Public availability of BeppoSAX data of GRB000926
  34. GRB000926: X-ray afterglow by BeppoSAX. Refined analysis
  35. GRB 000926, Optical Decay
  36. GRB000926 - Optical observations
  37. GRB000926 - Optical observations
  38. GRB 000926: optical observations
  39. GRB 000926, Optical Observations
  40. GRB000926 K'-band Observation
  41. GRB000926 : increasing optical decay slope
  42. GRB000926 optical observations
  43. GRB000926 - Optical observations
  44. Re: GRB 000926, optical observation by Oksanen (vsnet-grb)
  45. J and K band observations of GRB 000926
  46. GRB 000926: Lightcurve Update and Predictions
  47. GRB 000926, optical observation by Oksanen (vsnet-grb)
  48. GRB000926: X-ray afterglow by BeppoSAX & plan of BSAX & Chandra obs.
  49. CONCAM crude optical limits before and after GRB000926
  50. GRB 000926: Preliminary R-band Lightcurve
  51. GRB 000926 HST/Chandra TOO Status
  52. Spectroscopic Redshift of GRB 000926
  53. GRB 000926, Optical Observation
  54. GRB 000926: Optical candidate
  55. Optical candidate for GRB000926
  56. IPN triangulation of GRB000926
  57. GRB 000911, BVRI field photometry
  58. GRB000911: Sub-millimeter observations
  59. IPN triangulation of GRB000925
  60. IPN triangulation of GRB000911
  61. IPN triangulation of GRB000910
  62. False GRB alarm from RXTE/ASM on 8 Sept 2000
  63. GRB 000830: Optical observations
  64. GRB000830: Optical observations
  65. GRB000830, TNG B-band observations
  66. GRB000830, BVRI field photometry
  67. GRB000830: Optical observations
  68. GRB000210, Optical observations
  69. Chandra Position of GRB000210
  70. "Snapshot" afterglow IDs and GRB 000830
  71. IPN triangulation of GRB000830
  72. HST/STIS observations of the host galaxy of GRB 980329
  73. HST/STIS observations of the chaotic environment of GRB 980613
  74. IPN localization of GRB000820
  75. GRB000801 & GRB000730, Gamma Ray Observations
  76. GRB000730, Gamma Ray Observations
  77. GRB000812, Radio observations
  78. IPN localization of GRB000812
  79. IPN localization of GRB000811
  80. GRB000801, Gamma Ray Observations
  81. GRB000801, VLT-Antu R-band observations
  82. GRB 991208 Host Galaxy Imaging
  83. Updated IPN coordinates for GRB000801
  84. IPN localization of GRB000801
  85. IPN localization of GRB000730B
  86. IPN localization of GRB000730B
  87. IPN localization of GRB000730
  88. GRB 990510: Possible detection of a host galaxy
  89. GRB 990510 Host Galaxy Discovery
  90. GRB 000727, optical observations
  91. IPN localization of GRB000727
  92. GRB 990705, HST/STIS observations of the host galaxy
  93. GRB 990712: Late time HST/STIS Observations
  94. GRB 991216, HST/STIS observations
  95. GRB981226, HST/STIS observations of the host galaxy
  96. GRB 000630: Detection of the Optical Afterglow
  97. GRB000630, Revised BVRI Field Photometry
  98. GRB000630, Optical Observations
  99. GRB000630, optical observations
  100. GRB000630, BVRI Field Photometry

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