ASTROSAT CZTI

Data Quality Report

Orbit 20200827_A09_095T02_9000003846_level2

Creation date: 2025-12-14T15:23:16.696914
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_095T02_9000003846cztM0_level2.fits modeM0/AS1A09_095T02_9000003846cztM0_level2_quad_clean.evt
Size (bytes)1,987,600,3201,945,860,480
Size1.9 GB 1.8 GB
Events in quadrant A12,935,98412,580,429
Events in quadrant B12,087,03212,347,400
Events in quadrant C12,194,72411,773,590
Events in quadrant D9,028,8128,310,767

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03510
B03510
C03510
D03510

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04310570
B05234400
C04947540
D09387760

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A041380
B041380
C041380
D041380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A20317120701.018846%
B20317178193.848482%
C20317180393.956765%
D2031716048329.769505%

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 238230 203135 0 0 0.00% 0.00%
B 238230 203026 0 0 0.00% 0.00%
C 238230 203091 0 0 0.00% 0.00%
D 238230 199846 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 10775 9.39 3375 3189 807.5
A 7 110 9995 8.43 3375 3189 807.5
A 9 19 9676 8.03 3375 3189 807.5
B 2 9 9617 10.58 3205 3082 617.4
B 5 128 8121 8.16 3205 3082 617.4
B 2 8 8087 8.11 3205 3082 617.4
C 12 241 8515 6.79 3225 3031 808.0
C 3 187 8341 6.57 3225 3031 808.0
C 9 209 8159 6.35 3225 3031 808.0
D 10 189 6475 6.06 2576 2358 678.9
D 3 14 6441 6.01 2576 2358 678.9
D 15 46 6298 5.8 2576 2358 678.9

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