ASTROSAT CZTI

Data Quality Report

Orbit 02741

Creation date: 2026-02-20T10:53:28.665256
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/AS1T01_112T01_9000000406_02741cztM0_level2.fits modeM0/AS1T01_112T01_9000000406_02741cztM0_level2_quad_clean.evt
Size (bytes)477,264,960134,055,360
Size455.2 MB 127.8 MB
Events in quadrant A3,672,145891,725
Events in quadrant B5,692,530879,620
Events in quadrant C3,666,095908,512
Events in quadrant D4,013,174822,520

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0164621
B0224070
C0164810
D0176000

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01600
B01600
C01600
D01600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A80062052.560580%
B80066948.668499%
C8006841.049213%
D80061331.661254%

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 8006 8006 0 0 0.00% 0.00%
B 8006 8006 213 213 2.66% 2.66%
C 8006 8006 1 1 0.01% 0.01%
D 8006 8006 19 19 0.24% 0.24%

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 8 15 21218 102.32 949 926 198.3
A 12 194 10445 48.0 949 926 198.3
A 0 226 9708 44.28 949 926 198.3
B 14 167 1818622 9937.1 947 924 182.9
B 6 36 158419 861.0 947 924 182.9
B 10 244 36391 193.89 947 924 182.9
C 5 172 9904 41.21 929 934 217.7
C 13 61 8285 33.77 929 934 217.7
C 12 4 6322 24.75 929 934 217.7
D 7 67 260125 1181.69 916 893 219.4
D 9 64 70853 318.91 916 893 219.4
D 5 172 48908 218.87 916 893 219.4

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