ASTROSAT CZTI

Data Quality Report

Orbit 20190911_C04_001T01_9000003156_level2

Creation date: 2025-12-03T14:36:11.189473
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/AS1C04_001T01_9000003156cztM0_level2.fits modeM0/AS1C04_001T01_9000003156cztM0_level2_quad_clean.evt
Size (bytes)850,464,000952,629,120
Size811.1 MB 908.5 MB
Events in quadrant A5,264,2826,079,087
Events in quadrant B5,012,7766,080,719
Events in quadrant C5,006,5085,486,314
Events in quadrant D4,357,3685,093,835

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01924490
B01907360
C02251130
D02500040

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018140
B018140
C018140
D018140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8915612041.350442%
B8915610011.122751%
C8915542144.726600%
D8915557086.402333%

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 110535 89129 0 0 0.00% 0.00%
B 110535 89142 0 0 0.00% 0.00%
C 110535 89143 0 0 0.00% 0.00%
D 110535 89107 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 5054 11.14 1374 1294 337.5
A 7 110 4189 8.58 1374 1294 337.5
A 9 19 4059 8.19 1374 1294 337.5
B 2 9 3969 10.58 1327 1274 254.6
B 2 8 3420 8.43 1327 1274 254.6
B 14 254 3323 8.05 1327 1274 254.6
C 1 81 3817 7.57 1321 1237 341.0
C 1 80 3803 7.53 1321 1237 341.0
C 12 241 3622 6.99 1321 1237 341.0
D 3 14 3284 6.47 1247 1139 331.3
D 7 3 3101 5.92 1247 1139 331.3
D 6 231 3082 5.87 1247 1139 331.3

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