ASTROSAT CZTI

Data Quality Report

Orbit 20220901_A11_027T01_9000005324_level2

Creation date: 2026-01-05T04:29:06.230370
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/AS1A11_027T01_9000005324cztM0_level2.fits modeM0/AS1A11_027T01_9000005324cztM0_level2_quad_clean.evt
Size (bytes)860,633,2801,262,767,680
Size820.8 MB 1.2 GB
Events in quadrant A5,164,1908,265,694
Events in quadrant B5,024,1488,408,081
Events in quadrant C5,155,5388,126,053
Events in quadrant D4,335,5347,066,971

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019020
B019020
C019020
D019020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03590
B03590
C03590
D03590

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02361430
B02081400
C02094850
D02713200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A931105630.604661%
B9311012811.375792%
C9311016451.766728%
D9311060756.524541%

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 127823 93108 0 0 0.00% 0.00%
B 127823 93085 0 0 0.00% 0.00%
C 127823 93073 0 0 0.00% 0.00%
D 127823 92833 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 9 19 4285 9.04 1353 1277 332.9
A 7 110 4226 8.86 1353 1277 332.9
A 0 29 4153 8.64 1353 1277 332.9
B 2 9 4331 12.04 1333 1280 253.3
B 3 80 4053 10.95 1333 1280 253.3
B 5 128 3580 9.08 1333 1280 253.3
C 1 81 4408 9.02 1366 1291 345.4
C 1 80 4231 8.51 1366 1291 345.4
C 3 187 3598 6.68 1366 1291 345.4
D 7 3 3238 6.26 1242 1134 336.3
D 10 189 3193 6.12 1242 1134 336.3
D 6 62 3179 6.08 1242 1134 336.3

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