ASTROSAT CZTI

Data Quality Report

Orbit 20170812_A03_116T01_9000001460_level2

Creation date: 2025-11-16T17:04:08.871082
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_116T01_9000001460cztM0_level2.fits modeM0/AS1A03_116T01_9000001460cztM0_level2_quad_clean.evt
Size (bytes)884,309,760863,850,240
Size843.3 MB 823.8 MB
Events in quadrant A5,450,6345,283,286
Events in quadrant B5,215,4125,257,407
Events in quadrant C5,314,8225,055,556
Events in quadrant D4,342,9164,112,479

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01650
B01650
C01650
D01650

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019200
B019220
C019220
D019220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01989540
B02115230
C01936810
D03088040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9413212521.330047%
B9412113941.481072%
C941446610.702116%
D941211099311.679646%

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 110842 94155 0 0 0.00% 0.00%
B 110842 94155 0 0 0.00% 0.00%
C 110842 94160 0 0 0.00% 0.00%
D 110841 94080 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 5288 11.22 1416 1326 353.1
A 7 110 4472 8.91 1416 1326 353.1
A 0 30 4135 7.95 1416 1326 353.1
B 2 9 4461 11.55 1377 1308 272.9
B 12 226 3560 8.25 1377 1308 272.9
B 14 254 3522 8.11 1377 1308 272.9
C 1 80 4035 7.48 1402 1302 365.3
C 1 81 3974 7.31 1402 1302 365.3
C 12 241 3681 6.51 1402 1302 365.3
D 6 231 3217 6.33 1238 1127 330.0
D 1 19 3139 6.09 1238 1127 330.0
D 7 3 3131 6.07 1238 1127 330.0

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