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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"

23575 results found.

  1. GRB030528(=H2724): Revised SXC Localization
  2. GRB 030528 Bisei optical observation
  3. GRB 030528 (=H2724) Kyoto optical observation
  4. IPN triangulation of GRB030523B (annulus)
  5. GRB 030416: Optical Observations
  6. IPN triangulation of GRB030523 (annulus)
  7. GRB 030329 Optical Observations
  8. GRB 021004: HST observations
  9. GRB030324: Further Observations of the Candidate Optical Afterglow
  10. GRB030519B (=H2716): Peak Fluxes, Fluences, and Energy Spectrum
  11. IPN triangulation of GRB030519B=H2716 (small error box)
  12. GRB030519B (=H2716): A Long, Bright GRB Localized by the HETE WXM
  13. IPN triangulation of GRB030519 (annulus)
  14. IPN triangulation of GRB030518C (annulus)
  15. IPN triangulation of GRB030518B (annulus)
  16. IPN triangulation of GRB030518A (annulus)
  17. IPN triangulation of GRB030514 (annulus)
  18. HETE GRB030329, correction to Rc Observations in Loiano
  19. IPN triangulation of GRB030513 (annulus)
  20. IPN triangulation of GRB030509B (annulus)
  21. GRB 030329: Optical limit (contemporaneous imaging)
  22. IPN triangulation of GRB030509 (small errror box)
  23. IPN triangulation of GRB030509 - correction
  24. IPN triangulation of GRB030509 (single error box)
  25. GRB030329, BVRI photometry
  26. GRB030429, refiend optical brightness
  27. GRB 030329: Optical limit (contemporaneous photography)
  28. GRB030418, BVRcIc field photometry
  29. GRB030429, BVRcIc field photometry
  30. IPN triangulation of GRB030506 (annulus)
  31. IPN triangulation of GRB030505B (large error box)
  32. IPN triangulation of GRB030505A (annulus)
  33. GRB030329: RTT150 optical observations and upper limit for a host
  34. GRB030501, optical observation
  35. GRB030501C triangulation (annulus)
  36. GRB030501 triangulation (correction to GCN 2194)
  37. GRB030329: RTT150 optical observations and upper limit for a host
  38. GRB 030429: Radio Observations
  39. GRB 030429: redshift from VLT spectroscopy
  40. GRB030501B triangulation (single error box)
  41. GRB030501: TAROT candidate afterglow present in archival images
  42. GRB 030501: TAROT possible candidate counterpart
  43. IPN triangulation of GRB030501 (IBIS event; annulus)
  44. IPN triangulation of GRB030501B (annulus)
  45. GRB 030429: confirmation of afterglow candidate
  46. GRB030501 localized by INTEGRAL
  47. GRB030425: CrAO optical observation
  48. IPN triangulation of GRB030429 (annulus)
  49. IPN triangulation of GRB030428 (two large error boxes)
  50. GRB 030329 Oprical observations in Rozhen observatory
  51. GRB 030324: Radio Observations
  52. IPN triangulation of GRB030426 (annulus)
  53. IPN triangulation of GRB030425 (single error box)
  54. GRB 030329, the review of the sky area in plate archive (1950-1998)
  55. IPN triangulation of GRB030422C (annulus)
  56. IPN triangulation of GRB030422B (annulus)
  57. GRB 030329: wide-field photograph by R. Tamura 1 hr after the burst
  58. GRB030329: optical polarization
  59. IPN triangulation of GRB030422 (two large error boxes)
  60. IPN triangulation of GRB030421 (annulus)
  61. MASTER:optical observations GRB030418
  62. MASTER:optical observations probable GRB030414
  63. IPN triangulation of GRB030419 (annulus)
  64. GRB030418: Upper limits from recent and historical observations.
  65. GRB030418: Kiso near infrared observations
  66. OT GRB 030329: early spectrum
  67. GRB030324: Candidate Optical Afterglow
  68. IPN triangulation of GRB030414 (small error box)
  69. GRB 030413: Optical Observations
  70. IPN triangulation of GRB030413 (small error box)
  71. IPN triangulation of GRB030410 (annulus)
  72. Superluminal motion in GRB 030329 (Correction)
  73. Superluminal motion in GRB 030329
  74. GRB 030329 and SN 2003dh
  75. GRB030329, optical position
  76. IPN triangulation of GRB030406 (small error box)
  77. IPN triangulation of GRB050403 (small error box)
  78. IPN triangulation of GRB030403 (annulus)
  79. GRB 030329: BVRI photometry at Asiago
  80. GRB 030329, light curve flattens
  81. GRB 030329: VLT V-band photometry
  82. Kiso observation of the GRB030329 at April 6
  83. GRB030328, UBVRcIc field photometry
  84. GRB 030329 Optical observations
  85. GRB030329: Kiso B and R band observations
  86. GRB030328: R upper limit after 6 hours by MASTER
  87. GRB 030329, BVRI photometry
  88. SDSS 0.5m PT observations of GRB030329 (correction)
  89. SDSS 0.5m PT observations of GRB030329
  90. GRB 030329, nearby galaxies
  91. GRB030329: final R-band light curve by MASTER
  92. GRB030329 Radio 23/43/90 GHz observations at Nobeyama
  93. GRB030329, optical observation
  94. GRB030329, new UBVRcIc field photometry
  95. GRB 030329, light curve and SN prediction
  96. GRB030328: Full Observation, X-ray Fading and Spectrum Measured
  97. GRB030329: Optical observations at Teramo
  98. GRB 030329: Radio observations at GMRT
  99. GRB 030329: Additional Mt. Laguna Optical Observations
  100. GRB 030329: Observations with ANDICAM

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