ASTROSAT CZTI

Data Quality Report

Orbit 20170517_A03_036T01_9000001230_level2

Creation date: 2025-11-13T15:35:05.076493
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_036T01_9000001230cztM0_level2.fits modeM0/AS1A03_036T01_9000001230cztM0_level2_quad_clean.evt
Size (bytes)634,965,120636,491,520
Size605.5 MB 607.0 MB
Events in quadrant A3,801,8363,780,095
Events in quadrant B3,676,3263,811,846
Events in quadrant C3,773,6843,636,523
Events in quadrant D3,284,2803,355,790

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013960
B013980
C014080
D013920

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01160
C01160
D01140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01676020
B01505450
C01398270
D01611700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6841318442.695394%
B6845912671.850743%
C684454280.625320%
D683198181.197324%

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 85254 69191 0 0 0.00% 0.00%
B 85254 69255 0 0 0.00% 0.00%
C 85254 69243 0 0 0.00% 0.00%
D 85254 69115 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 3745 11.26 990 925 250.4
A 7 110 3155 8.9 990 925 250.4
A 0 30 2862 7.73 990 925 250.4
B 2 9 3157 11.44 973 925 195.1
B 14 254 2604 8.61 973 925 195.1
B 3 17 2535 8.25 973 925 195.1
C 1 80 2789 7.2 995 923 259.3
C 12 241 2723 6.94 995 923 259.3
C 1 81 2720 6.93 995 923 259.3
D 3 14 2453 6.41 935 850 250.2
D 10 189 2340 5.96 935 850 250.2
D 3 31 2335 5.94 935 850 250.2

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