ASTROSAT CZTI

Data Quality Report

Orbit 55542

Creation date: 2026-01-04T20:07:06.305784
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A14_021T06_9000006538_55542cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55542cztM0_level2_quad_clean.evt
Size (bytes)1,223,087,040279,325,440
Size1.1 GB 266.4 MB
Events in quadrant A9,916,0271,807,267
Events in quadrant B10,388,9511,937,451
Events in quadrant C10,891,3541,738,014
Events in quadrant D12,541,0331,606,640

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0445565
B0458465
C0470145
D05169513

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04020
B04020
C04020
D04020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A198533651.838513%
B198544142.085222%
C198542781.400222%
D198536793.420138%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 21108 19857 215 215 1.02% 1.08%
B 21109 19859 202 202 0.96% 1.02%
C 21109 19859 229 229 1.08% 1.15%
D 21109 19859 539 539 2.55% 2.71%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 4 159 917038 1795.32 2060 2004 509.7
A 0 8 310327 604.94 2060 2004 509.7
A 4 3 213078 414.13 2060 2004 509.7
B 4 206 921944 2131.69 2036 1961 431.6
B 5 236 632366 1460.71 2036 1961 431.6
B 0 171 314950 725.23 2036 1961 431.6
C 9 38 855482 1561.16 2012 1987 546.7
C 12 250 698418 1273.86 2012 1987 546.7
C 13 3 409021 744.52 2012 1987 546.7
D 11 129 1978817 3495.96 1993 1905 565.5
D 2 249 817453 1442.21 1993 1905 565.5
D 2 172 453440 798.49 1993 1905 565.5

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter