ASTROSAT CZTI

Data Quality Report

Orbit 50749

Creation date: 2025-02-14T17:56:10.211500
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/AS1C07_001T01_9000006450_50749cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50749cztM0_level2_quad_clean.evt
Size (bytes)2,546,245,440344,306,880
Size2.4 GB 328.4 MB
Events in quadrant A25,910,3332,214,551
Events in quadrant B12,930,3932,588,435
Events in quadrant C28,058,5581,961,122
Events in quadrant D25,387,5301,901,957

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05180
B05180
C05180
D05180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09468223
B0568109
C010076126
D09316924

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A25540290311.366484%
B255414561.785365%
C25540463918.163665%
D25542362414.188396%

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 26944 25544 2523 2523 9.36% 9.88%
B 26944 25544 92 92 0.34% 0.36%
C 26945 25544 4316 4316 16.02% 16.90%
D 26945 25544 3311 3311 12.29% 12.96%

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 4 4 10966972 16326.84 2683 2607 671.6
A 3 130 968708 1438.6 2683 2607 671.6
A 4 3 768774 1140.89 2683 2607 671.6
B 10 247 387914 657.27 2735 2631 586.2
B 8 128 310079 524.49 2735 2631 586.2
B 7 0 250586 422.99 2735 2631 586.2
C 9 38 3597212 5279.72 2486 2464 680.9
C 15 174 2796858 4104.22 2486 2464 680.9
C 15 157 1692939 2482.85 2486 2464 680.9
D 1 47 3825721 5428.67 2498 2415 704.3
D 15 93 1878936 2664.45 2498 2415 704.3
D 2 216 1809948 2566.5 2498 2415 704.3

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