ASTROSAT CZTI

Data Quality Report

Orbit 20170822_A03_072T01_9000001484_level2

Creation date: 2025-11-16T21:27:25.960247
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/AS1A03_072T01_9000001484cztM0_level2.fits modeM0/AS1A03_072T01_9000001484cztM0_level2_quad_clean.evt
Size (bytes)720,714,240713,465,280
Size687.3 MB 680.4 MB
Events in quadrant A4,380,5944,350,583
Events in quadrant B4,142,9404,247,868
Events in quadrant C4,312,7644,102,863
Events in quadrant D3,765,1743,684,288

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01619290
B01721510
C01637980
D01933580

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014650
B014630
C014670
D014660

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7627510551.383153%
B7524113551.800880%
C767768781.143587%
D7766121452.762004%

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 93532 79468 0 0 0.00% 0.00%
B 93532 78627 0 0 0.00% 0.00%
C 93532 79941 0 0 0.00% 0.00%
D 93532 79018 0 0 0.00% 0.00%

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 0 29 4311 11.36 1140 1068 285.4
A 7 110 3601 8.88 1140 1068 285.4
A 0 30 3326 7.91 1140 1068 285.4
B 2 9 3528 11.61 1094 1044 214.0
B 14 254 2791 8.16 1094 1044 214.0
B 3 17 2753 7.99 1094 1044 214.0
C 1 80 3154 7.03 1139 1056 298.4
C 1 81 3101 6.85 1139 1056 298.4
C 12 241 2992 6.49 1139 1056 298.4
D 3 14 2812 6.31 1075 974 291.5
D 6 231 2769 6.16 1075 974 291.5
D 7 5 2683 5.86 1075 974 291.5

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