ASTROSAT CZTI

Data Quality Report

Orbit 20220129_T04_086T01_9000004890_level2

Creation date: 2022-02-01T20:54:32.499508
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_086T01_9000004890cztM0_level2_bc.evt modeM0/AS1T04_086T01_9000004890cztM0_level2_quad_clean.evt
Size (bytes)6,249,490,5601,545,312,960
Size5.8 GB 1.4 GB
Events in quadrant A25,726,6669,801,914
Events in quadrant B42,810,0689,750,175
Events in quadrant C34,723,5879,986,913
Events in quadrant D77,849,9279,030,665

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02453010
B03125840
C02647910
D04176660

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A024520
B024520
C024520
D024520

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04620
B04620
C04620
D04620

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1201922140.178048%
B12019254314.518604%
C12019213171.095747%
D12019289377.435603%

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 173074 120209 24 24 0.01% 0.02%
B 173074 120194 462 462 0.27% 0.38%
C 173074 120186 257 257 0.15% 0.21%
D 173074 120190 3700 3700 2.14% 3.08%

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 9 143 545999 396.46 6234 6140 1361.7
A 10 83 379543 274.22 6234 6140 1361.7
A 13 6 229419 163.97 6234 6140 1361.7
B 5 172 11492035 9483.4 6233 6100 1211.2
B 4 251 2659141 2190.49 6233 6100 1211.2
B 0 229 1106022 908.15 6233 6100 1211.2
C 15 214 4893929 3390.8 6281 6253 1441.5
C 14 254 2776225 1921.65 6281 6253 1441.5
C 0 10 980719 676.03 6281 6253 1441.5
D 8 195 19863447 12631.99 6053 5934 1572.0
D 7 223 12936582 8225.59 6053 5934 1572.0
D 12 235 9178289 5834.82 6053 5934 1572.0

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