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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"

28124 results found.

  1. XRF 030723, optical observations
  2. XRF030723 (=H2777): An X-ray Flash Localized by the HETE WXM and
  3. Konus-Wind detection of the bursts from SGR1806-20 region
  4. SGR 1806-20, submm observations
  5. RXTE PCA Observations of SGR1806-20 Region
  6. IPN triangulation of GRB030714 (two large error boxes)
  7. IPN triangulation of GRB030715 (two large error boxes)
  8. GRB030706 triangulation (single large error box)
  9. GRB030329, optical observation in May
  10. IPN triangulation of GRB030626 (single large error box)
  11. IPN triangulation of GRB030626 (two large error boxes)
  12. GRB030329: second XMM-Newton observation
  13. GRB030329 -- RATAN-600 data in April-May
  14. GRB030528(=H2724): X-ray Afterglow Identified in Second Epoch
  15. IPN triangulation of GRB030606 (two alternate error boxes)
  16. GRB 030528: Infrared Observations and the Proposed IR Counterpart
  17. GRB 030528: tentative NIR counterpart
  18. GRB030528(=H2724): Observations with the Chandra X-ray Observatory
  19. GRB030528, BVRI field photometry
  20. GRB030329, SPM optical observations
  21. GRB030528: Chandra TOO Planned
  22. GRB030528(=H2724): Revised SXC Localization
  23. GRB 030528 Bisei optical observation
  24. GRB030528 (H2724): A long GRB localized by HETE
  25. GRB 030329: Correction to GCN 2254
  26. GRB 030329: Optical Observations
  27. GRB 030528 (=H2724) Kyoto optical observation
  28. GRB 030416: Optical Observations
  29. GRB 030329 Optical Observations
  30. GRB030329: XMM-Newton observation
  31. GRB 021004: HST observations
  32. GRB030324: Further Observations of the Candidate Optical Afterglow
  33. GRB030519B (=H2716): Peak Fluxes, Fluences, and Energy Spectrum
  34. IPN triangulation of GRB030519B=H2716 (small error box)
  35. HETE GRB030329, correction to Rc Observations in Loiano
  36. GRB 030329: Optical limit (contemporaneous imaging)
  37. IPN triangulation of GRB030509 (small errror box)
  38. GRB030329, BVRI photometry
  39. GRB030429, refiend optical brightness
  40. GRB 030329: Optical limit (contemporaneous photography)
  41. GRB030418, BVRcIc field photometry
  42. GRB030429, BVRcIc field photometry
  43. GRB030429 (=H2695): A Long GRB Localized by the HETE WXM and SXC
  44. XRF030416 (=U10897): An X-Ray Flash Localized by the HETE WXM
  45. GRB030329: RTT150 optical observations and upper limit for a host
  46. GRB030501, optical observation
  47. GRB030501 triangulation (correction to GCN 2194)
  48. GRB030329: RTT150 optical observations and upper limit for a host
  49. GRB 030429: redshift from VLT spectroscopy
  50. GRB030501B triangulation (single error box)
  51. GRB 030329, BVRI photometry
  52. GRB030429: Optical Observations
  53. GRB030501: TAROT candidate afterglow present in archival images
  54. GRB 030429: confirmation of afterglow candidate
  55. GRB 030329 Oprical observations in Rozhen observatory
  56. SNeIa AS THE POSSIBLE PROGENITORS OF SHORT-DURATION GRBs.
  57. IPN triangulation of GRB030425 (single error box)
  58. GRB 030329, the review of the sky area in plate archive (1950-1998)
  59. GRB 030329: optical spectropolarimetry at VLT
  60. GRB 030329: wide-field photograph by R. Tamura 1 hr after the burst
  61. GRB030329: optical polarization
  62. IPN triangulation of GRB030422 (two large error boxes)
  63. GRB030329, optical observation
  64. MASTER:optical observations GRB030418
  65. MASTER:optical observations probable GRB030414
  66. GRB030418: Kiso near infrared observations
  67. GRB 030418: Optical afterglow
  68. OT GRB 030329: early UBVRcIc spectral evolution
  69. OT GRB 030329: early spectrum
  70. IPN triangulation of GRB030414 (small error box)
  71. IPN triangulation of GRB030413 (small error box)
  72. Superluminal motion in GRB 030329 (Correction)
  73. Superluminal motion in GRB 030329
  74. GRB030329, optical position
  75. IPN triangulation of GRB030406 (small error box)
  76. IPN triangulation of GRB050403 (small error box)
  77. GRB 030329: BVRI photometry at Asiago
  78. GRB 030329: VLT V-band photometry
  79. Kiso observation of the GRB030329 at April 6
  80. GRB 030329, color evolution
  81. GRB030328, UBVRcIc field photometry
  82. GRB 030329 Optical observations
  83. GRB030329: Kiso B and R band observations
  84. GRB030328: R upper limit after 6 hours by MASTER
  85. SDSS 0.5m PT observations of GRB030329 (correction)
  86. SDSS 0.5m PT observations of GRB030329
  87. GRB030329: final R-band light curve by MASTER
  88. GRB030329, optical observation
  89. GRB030329, new UBVRcIc field photometry
  90. GRB 030329, light curve and SN prediction
  91. GRB 030329, BRI photometry
  92. GRB030328: Full Observation, X-ray Fading and Spectrum Measured
  93. GRB030329: Optical observations at Teramo
  94. GRB 030329: Radio observations at GMRT
  95. Further AAVSO V,B,R observations of GRB030329
  96. GRB 030329: Additional Mt. Laguna Optical Observations
  97. GRB 030329: Observations with ANDICAM
  98. GRB030329: further optical photometry and evidence for a light curve discontinuity
  99. triangulation of GRB 030331 (single error box)
  100. GRB 030329: optical observations

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