ASTROSAT CZTI

Data Quality Report

Orbit 35487

Creation date: 2022-04-21T22:29:51.118401
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/AS1T04_095T01_9000005080_35487cztM0_level2.evt modeM0/AS1T04_095T01_9000005080_35487cztM0_level2_quad_clean.evt
Size (bytes)704,563,200122,880,960
Size671.9 MB 117.2 MB
Events in quadrant A7,061,896767,617
Events in quadrant B4,933,760826,403
Events in quadrant C4,084,802821,219
Events in quadrant D4,755,933790,153

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0259651
B0195251
C0167781
D0186481

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7411132117.824855%
B74112984.021050%
C7411811.092970%
D74111852.496289%

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 8784 7412 1182 1182 13.46% 15.95%
B 8784 7412 177 177 2.02% 2.39%
C 8784 7412 56 56 0.64% 0.76%
D 8784 7412 177 177 2.02% 2.39%

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 15 169 3937615 25300.82 775 759 155.6
A 10 83 120039 766.57 775 759 155.6
A 13 254 11038 66.06 775 759 155.6
B 4 171 612282 3945.74 814 793 155.0
B 5 236 405878 2613.88 814 793 155.0
B 4 81 263790 1697.03 814 793 155.0
C 0 207 462210 2498.46 798 804 184.7
C 15 214 298245 1610.61 798 804 184.7
C 0 10 156244 841.69 798 804 184.7
D 13 249 501727 2604.29 798 776 192.4
D 8 195 422768 2193.81 798 776 192.4
D 7 80 264695 1372.03 798 776 192.4

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