ASTROSAT CZTI

Data Quality Report

Orbit 35480

Creation date: 2022-04-21T09:44:45.024735
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_35480cztM0_level2.evt modeM0/AS1T04_095T01_9000005080_35480cztM0_level2_quad_clean.evt
Size (bytes)626,857,92090,434,880
Size597.8 MB 86.2 MB
Events in quadrant A2,774,285704,128
Events in quadrant B3,285,532708,421
Events in quadrant C10,001,622297,493
Events in quadrant D2,591,106683,432

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0111073
B0128252
C0331552
D0107042

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0330
B0330
C0330
D0340

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0980
B0980
C0980
D0980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4904951.937194%
B49042134.343393%
C4904345570.452692%
D4904210.428222%

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 7056 4905 99 99 1.40% 2.02%
B 7056 4905 144 144 2.04% 2.94%
C 7056 4905 3027 3027 42.90% 61.71%
D 7056 4905 19 19 0.27% 0.39%

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 311466 2624.18 601 592 118.5
A 10 83 122731 1031.01 601 592 118.5
A 13 6 14549 117.82 601 592 118.5
B 5 236 500479 4499.68 593 578 111.1
B 5 172 275235 2472.23 593 578 111.1
B 4 232 89974 804.67 593 578 111.1
C 4 254 8360999 127526.04 284 288 65.6
C 0 10 195485 2977.34 284 288 65.6
C 0 207 134974 2054.37 284 288 65.6
D 8 195 61310 418.92 600 586 145.0
D 13 249 58084 396.67 600 586 145.0
D 2 250 42065 286.16 600 586 145.0

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