ASTROSAT CZTI

Data Quality Report

Orbit 56704

Creation date: 2026-03-22T14:34:30.514649
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/AS1A14_083T06_9000006558_56704cztM0_level2.fits modeM0/AS1A14_083T06_9000006558_56704cztM0_level2_quad_clean.evt
Size (bytes)1,425,211,200250,940,160
Size1.3 GB 239.3 MB
Events in quadrant A13,812,5541,649,907
Events in quadrant B13,164,6461,732,275
Events in quadrant C14,678,9551,454,384
Events in quadrant D9,648,7241,466,779

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03820
B03820
C03820
D03820

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0543212
B0526042
C0567032
D0427963

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1876611416.080145%
B1876714557.752971%
C18767216511.536207%
D187666713.575615%

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 19561 18767 683 683 3.49% 3.64%
B 19562 18768 704 704 3.60% 3.75%
C 19562 18769 1507 1507 7.70% 8.03%
D 19561 18768 351 351 1.79% 1.87%

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 3 14 3063158 6344.96 1970 1920 482.5
A 3 62 2028434 4200.31 1970 1920 482.5
A 6 179 479653 990.19 1970 1920 482.5
B 5 185 4437562 10714.24 1941 1868 414.0
B 5 172 349010 838.51 1941 1868 414.0
B 10 247 176224 421.15 1941 1868 414.0
C 13 3 3504198 6997.89 1854 1838 500.5
C 15 230 2572492 5136.29 1854 1838 500.5
C 15 164 536913 1069.11 1854 1838 500.5
D 2 249 1278646 2378.7 1924 1837 536.8
D 5 173 171422 315.94 1924 1837 536.8
D 2 236 137492 252.73 1924 1837 536.8

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