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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"

19210 results found.

  1. GRB 001109: deep JHK upper limits
  2. GRB 001109 X-ray afterglow with BeppoSAX
  3. CORRECTION to XMM-Newton observation of GRB001025
  4. GRB001109, Radio observations
  5. IPN TRIANGULATION OF GRB001105
  6. GRB 991208: HST Imaging of the Host Galaxy
  7. XMM-Newton observation of GRB001025
  8. IPN TRIANGULATION OF GRB001025B (SHORT/HARD)
  9. CORRECTION TO IPN/RXTE ERROR BOX FOR GRB001025
  10. ASM Localization of GRB 001025
  11. GRB 001018, Possible Radio Afterglow
  12. GRB001018, Gamma Ray Observations
  13. IPN TRIANGULATION OF GRB001019
  14. IPN TRIANGULATION OF GRB001018
  15. IPN TRIANGULATION OF GRB 001017
  16. V,R,I band observations of GRB000926
  17. HETE positions added to GCN
  18. GRB 001007, BVR-band observations
  19. IPN triangulation of GRB001005
  20. HETE-2 48 hour Launch Delay
  21. IPN triangulation of GRB 001004
  22. GRB000926: X-ray afterglow by BeppoSAX. Refined analysis
  23. GRB000926 - Optical observations
  24. GRB000926 - Optical observations
  25. GRB 000926, Optical Decay
  26. GRB000911: VLT infrared observation
  27. GRB000926 K'-band Observation
  28. GRB000926: X-ray afterglow by BeppoSAX & plan of BSAX & Chandra obs.
  29. GRB 000926: Preliminary R-band Lightcurve
  30. Spectroscopic Redshift of GRB 000926
  31. GRB000911, Radio and Optical observations
  32. IPN triangulation of GRB000911
  33. IPN triangulation of GRB000910
  34. GRB000210, Optical observations
  35. "Snapshot" afterglow IDs and GRB 000830
  36. SGR 1806-20 burst activity
  37. GRB000730, Gamma Ray Observations
  38. GRB000812, Radio observations
  39. IPN localization of GRB000812
  40. GRB000801, Gamma Ray Observations
  41. GRB 991208 Host Galaxy Imaging
  42. IPN localization of GRB000730B
  43. IPN localization of GRB000730
  44. IPN localization of GRB000727
  45. GRB 990712: Late time HST/STIS Observations
  46. GRB 991216, HST/STIS observations
  47. GRB000620, Radio Observations
  48. GRB000630, Optical Observations
  49. GRB000630, Radio Observations
  50. possible optical counterpart of GRB 000630
  51. IPN triangulation of GRB000630
  52. GRB000623
  53. GRB000615: H-band observations
  54. GRB990308, HST/STIS observations of the host galaxy
  55. GRB000607, optical observations
  56. GRB990123, HST/STIS observations of the host galaxy
  57. GRB 000615, near-infrared observations
  58. GRB 990123: Late-time HST/STIS 50CCD observations of the host
  59. GRB000615B [IPN Position]
  60. The Hosts of GRB 980703 and GRB 971214
  61. GRB000528: follow-up X-ray measurements and update of IPN annulus
  62. GRB980519, HST/STIS observations of the host galaxy
  63. GRB000604 optical non-detection
  64. GRB000607, A SHORT, HARD BURST
  65. GRB000604, optical observations
  66. GRB 000604 optical observations
  67. GRB 000418: Detection of the Host Galaxy
  68. GRB000528, Radio Observations
  69. GRB000528: BeppoSAX NFI follow-up preliminary analysis
  70. IPN triangulation of GRB000519
  71. IPN triangulation of GRB000516
  72. GRB000424, optical observations
  73. IPN localization of GRB000429
  74. GRB000418, near-infrared observations
  75. Correction to IPN error box for GRB000419
  76. BATSE observations of FXT/GRB 000416 = 1SAXJ1715.0-7134
  77. GRB000416 BRJK observations
  78. GRB 000408, optical observations
  79. Refined IPN error box for GRB000408
  80. GRB000408, lotis optical observations
  81. GRB000408 [IPN Position]
  82. GRB 000323, optical observations
  83. GRB 000326: Optical Observations
  84. GRB 000313 - optical transient in the BATSE error box
  85. GRB 000307, Optical Observations
  86. GRB 000301C: A Precise Redshift Determination
  87. GRB 000301C, Optical Observation
  88. IPN error box for GRB000307
  89. GRB000301C, optical R-band observations
  90. GRB000301c - R photometry and nearby faint source confirmation
  91. GRB 000301C Optical Observations
  92. GRB 000301C: K' Observations
  93. GRB000301C OT candidate optical observations
  94. GRB000301C - Host galaxy not detected in R (?)
  95. GRB000301C, near-infrared observations (JHK' imaging)
  96. GRB 000301c near-IR observations
  97. GRB000301C 250 GHz detection
  98. GRB000301C, optical observations
  99. GRB000301C
  100. GRB 000301C : Optical Candidate

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