ASTROSAT CZTI

Data Quality Report

Orbit 20170731_A03_008T02_9000001422_level2

Creation date: 2025-11-15T17:27:11.397229
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_008T02_9000001422cztM0_level2.fits modeM0/AS1A03_008T02_9000001422cztM0_level2_quad_clean.evt
Size (bytes)121,282,56096,986,880
Size115.7 MB 92.5 MB
Events in quadrant A743,036538,832
Events in quadrant B729,706557,518
Events in quadrant C749,116539,143
Events in quadrant D614,360464,162

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02540
B02560
C02460
D02480

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0390
B0390
C0380
D0390

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0257580
B0264100
C0253980
D0376850

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A121041641.354924%
B121411861.531999%
C121421231.013013%
D119425874.915425%

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 16474 12421 0 0 0.00% 0.00%
B 16473 12450 0 0 0.00% 0.00%
C 16474 12460 0 0 0.00% 0.00%
D 16474 12336 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 29 712 10.67 193 183 49.6
A 7 110 644 9.3 193 183 49.6
A 9 19 574 7.89 193 183 49.6
B 2 9 621 11.06 192 185 39.4
B 14 254 499 7.97 192 185 39.4
B 5 128 480 7.48 192 185 39.4
C 1 81 564 7.2 197 185 52.6
C 1 80 537 6.69 197 185 52.6
C 9 188 508 6.14 197 185 52.6
D 6 231 475 6.61 175 160 47.7
D 10 189 447 6.02 175 160 47.7
D 6 67 439 5.85 175 160 47.7

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