ASTROSAT CZTI

Data Quality Report

Orbit 51818

Creation date: 2025-04-27T16:37:56.955543
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/AS1A13_090T01_9000006464_51818cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51818cztM0_level2_quad_clean.evt
Size (bytes)794,782,08097,246,080
Size758.0 MB 92.7 MB
Events in quadrant A5,157,321672,617
Events in quadrant B4,894,538740,234
Events in quadrant C4,786,459673,214
Events in quadrant D13,981,515319,900

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01560
C01560
D01560

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0205721
B0197421
C0197161
D0469041

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A77375697.354272%
B77385046.513311%
C77384555.880072%
D7738423754.755751%

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 7772 7738 137 137 1.76% 1.77%
B 7773 7739 59 59 0.76% 0.76%
C 7773 7739 197 197 2.53% 2.55%
D 7773 7738 3567 3567 45.89% 46.10%

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 15 174 883436 4244.36 855 834 207.9
A 10 253 270098 1294.87 855 834 207.9
A 5 240 106864 509.89 855 834 207.9
B 10 128 473624 2569.62 852 819 184.0
B 5 32 262458 1421.97 852 819 184.0
B 0 143 153479 829.68 852 819 184.0
C 15 218 500988 2181.96 849 841 229.2
C 12 254 250191 1087.82 849 841 229.2
C 0 192 142639 618.61 849 841 229.2
D 11 129 9655385 57247.79 615 593 168.6
D 0 18 824160 4883.31 615 593 168.6
D 8 48 688909 4081.35 615 593 168.6

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