ASTROSAT CZTI

Data Quality Report

Orbit 20180918_T02_110T01_9000002376_level2

Creation date: 2025-11-24T18:55:45.560705
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/AS1T02_110T01_9000002376cztM0_level2.fits modeM0/AS1T02_110T01_9000002376cztM0_level2_quad_clean.evt
Size (bytes)875,232,000791,107,200
Size834.7 MB 754.5 MB
Events in quadrant A5,412,7764,773,640
Events in quadrant B5,119,9844,665,373
Events in quadrant C5,204,9444,412,872
Events in quadrant D4,480,9743,820,490

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018680
B018680
C018680
D018680

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01600
B01600
C01600
D01600

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01949560
B02065720
C01930460
D02364760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9169412781.393766%
B9169415371.676227%
C9169412731.388313%
D9169457656.287216%

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 107618 91662 0 0 0.00% 0.00%
B 107618 91676 0 0 0.00% 0.00%
C 107619 91674 0 0 0.00% 0.00%
D 107618 91597 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 5211 11.17 1408 1322 348.1
A 7 110 4293 8.53 1408 1322 348.1
A 0 30 4157 8.14 1408 1322 348.1
B 2 9 4249 11.05 1359 1299 266.9
B 2 8 3538 8.39 1359 1299 266.9
B 5 128 3443 8.03 1359 1299 266.9
C 12 241 3635 6.7 1375 1279 351.6
C 3 126 3594 6.58 1375 1279 351.6
C 2 191 3558 6.48 1375 1279 351.6
D 3 14 3306 6.33 1279 1166 338.3
D 7 3 3149 5.86 1279 1166 338.3
D 10 189 3133 5.81 1279 1166 338.3

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