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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"

27030 results found.

  1. GRB 990506, HST/STIS Observations of the Host Galaxy
  2. GRB000620, optical observations
  3. GRB000615: H-band observations
  4. GRB990308, HST/STIS observations of the host galaxy
  5. IPN annulus for GRB000620
  6. GRB000620: BeppoSAX WFC and GRBM detection
  7. BeppoSAX ALERT: GRB000620
  8. GRB000620: BeppoSAX Alert
  9. GRB990123, HST/STIS observations of the host galaxy
  10. GRB 990123: Late-time HST/STIS 50CCD observations of the host
  11. GRB000615, further R-band photometry
  12. GRB980425, HST/STIS observations of the host galaxy
  13. GRB000615: BeppoSAX GRB Alert
  14. The Hosts of GRB 980703 and GRB 971214
  15. GRB 000301C: Further Late-Time HST/STIS observations
  16. GRB000528: follow-up X-ray measurements and update of IPN annulus
  17. Optical Follow-up of GRB000529 Error Box
  18. GRB980519, HST/STIS observations of the host galaxy
  19. GRB000607, Radio Observations
  20. BeppoSAX X-ray transient/possible GRB000608
  21. GRB000604 - Optical observations
  22. GRB000604, optical observations
  23. GRB 000604 optical observations
  24. GRB 000418: Detection of the Host Galaxy
  25. GRB000604 [IPN Position]
  26. X-ray Afterglow of GRB 000529
  27. GRB 000528 - WFC measurements
  28. GRB000529: BeppoSAX WFC position
  29. Possible GRB-related phenomenon
  30. RXTE/ASM and IPN localization of GRB 000508B
  31. GRB 000424 Optical Observations
  32. The redshift of GRB 000418
  33. GRB000418, Radio detection
  34. BeppoSAX GRB000424
  35. Correction to IPN error box for GRB000419
  36. GRB000419 [IPN Position]
  37. BATSE observations of FXT/GRB 000416 = 1SAXJ1715.0-7134
  38. GRB000416 BRJK observations
  39. 1SAXJ1715.0-7134 refined position
  40. X-ray burst or X-ray rich GRB 000416 observed by BeppoSAX
  41. GRB 991208, UBVRI field photometry
  42. GRB 000301C: Late-Time HST/STIS CCD Imaging of the field
  43. GRB000326 Optical Observations
  44. GRB000301C - R magnitude lower limit
  45. GRB000326, Further VLA observations
  46. GRB 000323, optical observations
  47. GRB000313, Radio observations
  48. GRB 000313 - optical transient in the BATSE error box
  49. GRB000301C - B and R photometry
  50. GRB000301C - R photometry
  51. GRB 000307, Optical Observations
  52. GRB 000307, BVRI Field Photometry
  53. GRB 000301C: A Precise Redshift Determination
  54. GRB 000301C: HST/STIS-PRISM NUV-MAMA spectroscopy
  55. GRB 000301C: HST/STIS CCD Imaging of the field
  56. GRB 000301c: K' observations
  57. GRB000301C, optical R-band observations
  58. GRB000301c - R photometry and nearby faint source confirmation
  59. GRB 000301c: K' observations
  60. GRB 000301C: K' Observations
  61. GRB000301C - Host galaxy not detected in R (?)
  62. GRB000301C, Radio observations
  63. GRB000301C, Radio observations
  64. GRB000301C optical observations
  65. GRB000301C, near-infrared observations (JHK' imaging)
  66. GRB000301C 250 GHz detection
  67. GRB 000301C, Optical Observation
  68. GRB000301C, near-infrared observations (JHK' photometry)
  69. GRB000301c optical observations
  70. GRB000301c, near-infrared observations
  71. GRB000301C
  72. GRB 000301C : Optical Candidate
  73. GRB000301C: RXTE/ASM and IPN localizations
  74. GRB 000214 ``Valentine's Day Burst'': BeppoSAX NFI Observation
  75. GRB000210, Radio Observations
  76. Correction to GCN 557 (GRB000214: BeppoSAX GRBM and WFC Detection)
  77. GRB000214: BeppoSAX GRBM and WFC Detection
  78. Optical observations of GRB000210
  79. GRB000210 X-ray afterglow
  80. GRB000214: X-ray afterglow candidate
  81. BeppoSAX GRB000214 ("S. Valentine's day GRB")
  82. GRB 000210: BATSE Observations
  83. Correction to Chandra Position of GRB000210 afterglow
  84. Optical observations of the Chandra X-ray source for GRB000210
  85. GRB000210, Radio Observations
  86. Optical candidate for GRB000210
  87. Chandra Observations of GRB000210 X-ray Afterglow
  88. GRB000201, Radio Observations
  89. GRB000210: BeppoSAX GRBM and WFC Detection
  90. Optical observations of GRB000131
  91. GRB000201 Optical Observations
  92. GRB 000201: TAROT optical observations
  93. GRB 000131 Optical Observations
  94. BATSE+IPN location of GRB000131
  95. IPN localization of GRB000131
  96. GRB000126, optical observations
  97. BATSE location of GRB000126
  98. IPN localization of GRB000126
  99. BATSE Observations of GRB000115
  100. Second RXTE Observation of GRB 000115

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