ASTROSAT CZTI

Data Quality Report

Orbit 20170821_C02_021T01_9000001482_level2

Creation date: 2025-11-16T21:08:12.880376
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/AS1C02_021T01_9000001482cztM0_level2.fits modeM0/AS1C02_021T01_9000001482cztM0_level2_quad_clean.evt
Size (bytes)597,689,280650,263,680
Size570.0 MB 620.1 MB
Events in quadrant A3,626,7984,025,145
Events in quadrant B3,440,5603,949,018
Events in quadrant C3,549,0143,807,028
Events in quadrant D3,069,1783,499,628

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0850
B0850
C0850
D0850

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010980
B010950
C010950
D010980

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01371350
B01432820
C01336000
D01550900

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A650766440.989612%
B6466610071.557233%
C653604070.622705%
D6512012981.993243%

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 102151 67306 0 0 0.00% 0.00%
B 102149 67024 0 0 0.00% 0.00%
C 102151 67534 0 0 0.00% 0.00%
D 102151 66121 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 3580 11.42 944 886 235.9
A 7 110 3007 8.99 944 886 235.9
A 0 30 2744 7.88 944 886 235.9
B 2 9 2985 11.9 909 870 177.7
B 14 254 2339 8.27 909 870 177.7
B 12 226 2337 8.26 909 870 177.7
C 1 81 2724 7.59 936 873 243.7
C 1 80 2690 7.45 936 873 243.7
C 12 241 2477 6.58 936 873 243.7
D 6 231 2322 6.41 876 794 238.4
D 7 3 2237 6.05 876 794 238.4
D 3 14 2230 6.02 876 794 238.4

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