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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.

"N/A_MC170616_R1" does not adhere to advanced search syntax. Please refer to the documentation and try again.
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').
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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

10919 results found.

  1. GRB 030329 Optical Observations
  2. GRB030324: Further Observations of the Candidate Optical Afterglow
  3. GRB030519B (=H2716): Peak Fluxes, Fluences, and Energy Spectrum
  4. IPN triangulation of GRB030519B=H2716 (small error box)
  5. GRB 030418: Second Epoch Optical Observations with Magellan
  6. GRB030519B (=H2716): A Long, Bright GRB Localized by the HETE WXM
  7. IPN triangulation of GRB030519 (annulus)
  8. IPN triangulation of GRB030518A (annulus)
  9. GRB030329: RTT150 optical observations
  10. GRB 030329: Optical limit (contemporaneous photography)
  11. GRB030429: RTT150 optical obs., correction to GCN 2208
  12. GRB 030329: High-Resolution Spectroscopy of the Host
  13. GRB030429 (=H2695): A Long GRB Localized by the HETE WXM and SXC
  14. GRB030418 (=H2686): A Long, X-Ray-Rich GRB Localized by the HETE WXM
  15. XRF030416 (=U10897): An X-Ray Flash Localized by the HETE WXM
  16. GRB030429: RTT150 optical observations, a possible host galaxy
  17. GRB030329: RTT150 optical observations and upper limit for a host
  18. GRB030329: RTT150 optical observations and upper limit for a host
  19. GRB 030429: IR photometry with IRSF/SIRIUS
  20. GRB 030329, the review of the sky area in plate archive (1950-1998)
  21. Optical Observations of GRB 030418 with Magellan
  22. GRB 030329: optical spectropolarimetry at VLT
  23. GRB030329: 444 AAVSO Measurements
  24. GRB030418: Upper limits from recent and historical observations.
  25. GRB 030418: Optical afterglow candidate
  26. GRB030329: VR Photometry at TNG
  27. GRB030324: Candidate Optical Afterglow
  28. GRB 030413: Optical Observations
  29. IPN triangulation of GRB030413 (small error box)
  30. IPN triangulation of GRB050403 (small error box)
  31. IPN triangulation of GRB030403 (annulus)
  32. GRB 030329: BVRI photometry at Asiago
  33. GRB 030329: VLT V-band photometry
  34. GRB 030329: Supernova Confirmed
  35. GRB030329: RTT150 optical observations
  36. GRB030329: RTT150 optical observations
  37. GRB 030329: Supernova Spectrum Emerging
  38. GRB030329: RTT150 optical observation
  39. GRB 030329, Optical observations
  40. GRB030329: final R-band light curve by MASTER
  41. GRB030329 Radio 23/43/90 GHz observations at Nobeyama
  42. GRB030329: optical observations at Tokyo Tech
  43. GRB 030329: optical observations
  44. GRB030328: Full Observation, X-ray Fading and Spectrum Measured
  45. GRB030329: Optical observations at Teramo
  46. GRB 030329: beginning of the new fading phase in optical band
  47. GRB 030329, optical spectroscopy
  48. GRB 030329: optical photometry
  49. GRB 030329: further optical observations
  50. GRB030329: R and B observations
  51. GRB030328: X-ray Fading and Spectrum Measured with Chandra
  52. GRB 030329: Light curve observed during the change of its slope.
  53. GRB 030329: Optical Decay
  54. GRB030329: optical spectroscopy with the TNG
  55. GRB030328: X-ray Afterglow Observed with Chandra
  56. GRB 030329: optical observations
  57. GRB030329: Upper limits from recent and historical observations.
  58. GRB030329 (=H2652): A Long, Extremely Bright GRB Localized by the HETE WXM and SXC
  59. GRB 030328: optical observations
  60. GRB030328: optical spectroscopy at TNG
  61. GRB030328: optical photometry at the TNG
  62. GRB030328 (=H2650): A Long, Bright GRB Localized by the HETE WXM and SXC
  63. Re: GRB 030328: Finding chart
  64. GRB030324, optical observations
  65. GRB030323: Upper limits from recent and historical observations.
  66. GRB030323 (=H2640): A Faint, Long GRB Localized by the HETE WXM and SXC
  67. GRB030324 (=H2641): A Long GRB Localized in Real Time by the HETE WXM
  68. GRB030324 (=H2641): A Long GRB Localized in Real Time by the HETE WXM
  69. GRB 030324, optical observations
  70. IPN triangulation of GRB030320B (annulus)
  71. GRB030226, addendum to GCN 1892
  72. IPN upper limit to a GRB associated with SN2003L
  73. IPN triangulation of GRB030317 (annulus)
  74. IPN triangulation of GRB030307 (annulus)
  75. GRB030226: Optical observations at Asiago
  76. GRB 030227: Optical observations
  77. IPN triangulation of GRB030301 (annulus)
  78. 030302: NOT A GRB
  79. 030228: NOT A GRB
  80. GRB 030226: R band polarimetric observations
  81. GRB 20030226: Upper limits from recent and historical observations
  82. GRB030227 - faint tentative OT candidate
  83. XMM-Newton observation of GRB030227
  84. GRB030226: ESI spectroscopy
  85. GRB030226 (=U10893): A Long GRB Localized by the HETE WXM and SXC
  86. GRB030226: optical observations and refined redshift
  87. GRB 030226 Optical Spectra and R,I,z' Imaging
  88. GRB030226: Candidate optical afterglow
  89. IPN triangulation of GRB030220 (annulus)
  90. IPN triangulation of GRB030217 (small error box)
  91. IPN triangulation of GRB030215C (annulus)
  92. IPN triangulation of GRB030217 (annulus)
  93. IPN triangulation of GRB030215A and GRB030215B (annuli)
  94. IPN triangulation of GRB030204 (small error box)
  95. IPN triangulation of GRB030127 (annulus)
  96. GRB 030115: Further IR observations with IRSF/SIRIUS
  97. GRB 030115: IR observations with IRSF/SIRIUS
  98. GRB030115: R-band counterpart of IR candidate
  99. GRB 021211: R-band observations at late-time
  100. IPN triangulation of GRB030115B (small error box)

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