ASTROSAT CZTI

Data Quality Report

Orbit 20180722_A04_105T01_9000002248_level2

Creation date: 2025-11-23T16:28:58.846030
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/AS1A04_105T01_9000002248cztM0_level2.fits modeM0/AS1A04_105T01_9000002248cztM0_level2_quad_clean.evt
Size (bytes)869,520,960826,652,160
Size829.2 MB 788.4 MB
Events in quadrant A5,142,5224,532,673
Events in quadrant B4,999,4784,782,455
Events in quadrant C5,181,3764,830,788
Events in quadrant D4,605,2424,492,864

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01530
B01530
C01530
D01530

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019060
B019060
C019060
D019060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03254120
B02556500
C02436590
D02069780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A932921173812.582001%
B9329277228.277237%
C9329234063.650903%
D9329216631.782575%

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 108682 93277 0 0 0.00% 0.00%
B 108682 93046 0 0 0.00% 0.00%
C 108682 93243 0 0 0.00% 0.00%
D 108682 93261 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 4898 11.07 1338 1254 329.2
A 7 110 4213 8.99 1338 1254 329.2
A 9 19 3881 7.98 1338 1254 329.2
B 2 9 4298 11.86 1321 1262 256.1
B 14 254 3331 8.08 1321 1262 256.1
B 2 8 3315 8.02 1321 1262 256.1
C 12 241 3743 6.93 1369 1271 356.6
C 2 191 3484 6.21 1369 1271 356.6
C 9 242 3384 5.93 1369 1271 356.6
D 3 14 3461 6.42 1312 1190 353.8
D 6 231 3407 6.27 1312 1190 353.8
D 10 189 3275 5.89 1312 1190 353.8

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