ASTROSAT CZTI

Data Quality Report

Orbit 58642

Creation date: 2026-07-30T21:36:55.586337
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_004T06_9000006594_58642cztM0_level2.fits modeM0/AS1A14_004T06_9000006594_58642cztM0_level2_quad_clean.evt
Size (bytes)497,016,00091,814,400
Size474.0 MB 87.6 MB
Events in quadrant A3,534,009631,368
Events in quadrant B4,516,444644,953
Events in quadrant C3,269,540605,315
Events in quadrant D6,598,239467,627

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01485547
B01779634
C01395840
D02396857

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A61722043.305250%
B61714907.940366%
C61681482.399481%
D6173134321.756034%

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 7268 6175 75 75 1.03% 1.21%
B 7274 6178 264 264 3.63% 4.27%
C 7268 6174 62 62 0.85% 1.00%
D 7268 6176 1101 1101 15.15% 17.83%

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 12 114 454919 2614.32 704 686 173.7
A 4 249 99127 566.57 704 686 173.7
A 13 248 90709 518.12 704 686 173.7
B 2 249 973161 6724.01 676 652 144.6
B 5 185 288474 1990.03 676 652 144.6
B 8 234 158367 1090.45 676 652 144.6
C 15 217 209044 1101.02 685 677 189.2
C 13 3 193071 1016.62 685 677 189.2
C 12 252 92701 486.26 685 677 189.2
D 8 240 1315320 7639.17 610 583 172.1
D 2 249 1271111 7382.3 610 583 172.1
D 8 160 957680 5561.14 610 583 172.1

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