ASTROSAT CZTI

Data Quality Report

Orbit 57823

Creation date: 2026-06-05T20:32:40.811713
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_083T16_9000006580_57823cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57823cztM0_level2_quad_clean.evt
Size (bytes)1,100,566,080174,948,480
Size1.0 GB 166.8 MB
Events in quadrant A6,332,0201,213,288
Events in quadrant B6,445,5431,286,274
Events in quadrant C17,854,279815,590
Events in quadrant D9,092,0501,075,160

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02640
B02640
C02640
D02640

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0285031
B0287101
C0621221
D0359972

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A131143412.600275%
B131153892.966069%
C13115429732.764011%
D131145454.155864%

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 13494 13115 98 98 0.73% 0.75%
B 13495 13116 69 69 0.51% 0.53%
C 13495 13116 3317 3317 24.58% 25.29%
D 13494 13115 448 448 3.32% 3.42%

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 10 251 615374 1780.75 1394 1357 344.8
A 3 14 181682 522.97 1394 1357 344.8
A 3 128 57990 164.25 1394 1357 344.8
B 5 172 171004 581.85 1379 1327 291.6
B 10 247 168987 574.94 1379 1327 291.6
B 6 51 105032 355.62 1379 1327 291.6
C 9 38 8693060 26768.68 1197 1181 324.7
C 15 224 3029283 9325.75 1197 1181 324.7
C 12 2 884976 2721.85 1197 1181 324.7
D 12 110 852660 2240.5 1353 1294 380.0
D 2 249 749086 1967.93 1353 1294 380.0
D 8 160 640494 1682.15 1353 1294 380.0

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