ASTROSAT CZTI

Data Quality Report

Orbit 20200809_A09_008T02_9000003796_level2

Creation date: 2025-12-14T06:03:31.337682
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/AS1A09_008T02_9000003796cztM0_level2.fits modeM0/AS1A09_008T02_9000003796cztM0_level2_quad_clean.evt
Size (bytes)1,914,727,6801,970,913,600
Size1.8 GB 1.8 GB
Events in quadrant A12,087,31812,450,996
Events in quadrant B11,591,33812,601,318
Events in quadrant C11,619,00011,676,979
Events in quadrant D9,281,4829,569,073

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A039860
B039860
C039860
D039860

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04045280
B04094420
C04806510
D06816600

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03230
B03230
C03230
D03230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A19549520201.033275%
B19549426881.374978%
C195492104745.357764%
D1954933307716.919787%

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 236776 195492 0 0 0.00% 0.00%
B 236776 195489 0 0 0.00% 0.00%
C 236776 195473 0 0 0.00% 0.00%
D 236776 191894 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 9965 9.11 3153 2973 767.2
A 7 110 9409 8.39 3153 2973 767.2
A 9 19 9035 7.9 3153 2973 767.2
B 2 9 9315 10.85 3072 2947 587.0
B 2 8 7791 8.25 3072 2947 587.0
B 3 17 7676 8.06 3072 2947 587.0
C 12 241 8276 7.0 3072 2892 768.9
C 3 126 7814 6.4 3072 2892 768.9
C 9 209 7705 6.26 3072 2892 768.9
D 3 14 6849 6.35 2646 2415 698.2
D 10 189 6569 5.95 2646 2415 698.2
D 6 67 6487 5.83 2646 2415 698.2

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