ASTROSAT CZTI

Data Quality Report

Orbit 50308

Creation date: 2025-01-16T13:58:06.718523
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/AS1C09_003T01_9000006442_50308cztM0_level2.fits modeM0/AS1C09_003T01_9000006442_50308cztM0_level2_quad_clean.evt
Size (bytes)1,213,531,20058,507,200
Size1.1 GB 55.8 MB
Events in quadrant A7,688,852511,341
Events in quadrant B6,358,915630,721
Events in quadrant C14,224,49932,321
Events in quadrant D16,113,070113,615

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B010
C010
D010

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0275091
B0236681
C0470141
D0527031

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6935168624.311464%
B6936102314.749135%
C6936661995.429642%
D6936574182.771050%

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 7050 6937 1242 1242 17.62% 17.90%
B 7051 6938 600 600 8.51% 8.65%
C 7051 6937 3910 3910 55.45% 56.36%
D 7051 6936 5418 5418 76.84% 78.11%

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 98 1561697 9344.07 675 659 167.1
A 3 231 1485622 8888.7 675 659 167.1
A 4 249 655486 3919.67 675 659 167.1
B 1 238 1620289 10714.15 707 682 151.2
B 4 206 1451225 9595.74 707 682 151.2
B 5 185 101628 667.79 707 682 151.2
C 15 197 6123036 116785.32 177 175 52.4
C 4 111 4599166 87719.56 177 175 52.4
C 6 143 1562447 29798.23 177 175 52.4
D 7 61 10946176 103570.44 371 359 105.7
D 2 37 1639082 15505.76 371 359 105.7
D 15 108 470940 4452.69 371 359 105.7

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