ASTROSAT CZTI

Data Quality Report

Orbit 20210719_T04_026T01_9000004556_level2

Creation date: 2025-12-27T14:19:38.337422
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/AS1T04_026T01_9000004556cztM0_level2.fits modeM0/AS1T04_026T01_9000004556cztM0_level2_quad_clean.evt
Size (bytes)942,675,840808,945,920
Size899.0 MB 771.5 MB
Events in quadrant A5,943,3004,802,444
Events in quadrant B5,517,2844,741,481
Events in quadrant C5,699,2804,539,113
Events in quadrant D4,995,2504,023,178

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01940490
B02847750
C02079490
D02522610

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018140
B018140
C018140
D018140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9352213021.392186%
B9352424952.667764%
C9352531693.388399%
D9352153445.714225%

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 107843 93525 0 0 0.00% 0.00%
B 107843 93520 0 0 0.00% 0.00%
C 107843 93511 0 0 0.00% 0.00%
D 107843 93479 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 5828 11.58 1547 1454 377.6
A 7 110 4664 8.5 1547 1454 377.6
A 0 30 4419 7.85 1547 1454 377.6
B 2 9 4432 10.69 1457 1394 284.1
B 2 8 3719 8.18 1457 1394 284.1
B 3 80 3692 8.09 1457 1394 284.1
C 12 241 4043 6.89 1511 1417 381.0
C 3 187 3916 6.56 1511 1417 381.0
C 9 209 3834 6.34 1511 1417 381.0
D 6 67 3563 6.02 1429 1310 374.0
D 3 14 3513 5.89 1429 1310 374.0
D 10 189 3511 5.88 1429 1310 374.0

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