ASTROSAT CZTI

Data Quality Report

Orbit 20170602_A03_120T01_9000001266_level2

Creation date: 2025-11-13T23:22:41.774631
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_120T01_9000001266cztM0_level2.fits modeM0/AS1A03_120T01_9000001266cztM0_level2_quad_clean.evt
Size (bytes)786,067,200702,129,600
Size749.7 MB 669.6 MB
Events in quadrant A4,788,9304,094,077
Events in quadrant B4,660,4204,140,824
Events in quadrant C4,702,2423,893,812
Events in quadrant D3,998,2943,480,594

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01530
C01540
D01540

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01849500
B01738800
C01697420
D02007250

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016880
B016880
C016920
D016880

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8237913371.622986%
B8247612131.470731%
C825047520.911471%
D8241130303.676694%

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 144500 83220 0 0 0.00% 0.00%
B 144500 83249 0 0 0.00% 0.00%
C 144500 83244 0 0 0.00% 0.00%
D 144500 83214 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 4508 10.8 1246 1166 309.4
A 7 110 4010 9.19 1246 1166 309.4
A 9 19 3525 7.62 1246 1166 309.4
B 2 9 4018 11.58 1232 1172 245.7
B 12 226 3146 8.04 1232 1172 245.7
B 3 17 3115 7.91 1232 1172 245.7
C 1 80 3421 6.98 1242 1152 325.1
C 1 81 3414 6.96 1242 1152 325.1
C 12 241 3282 6.55 1242 1152 325.1
D 7 5 2942 6.29 1142 1040 302.4
D 6 231 2938 6.28 1142 1040 302.4
D 7 3 2831 5.92 1142 1040 302.4

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